This study compares the environmental sustainability of five alternatives for the remediation of marine sediments of one of the most polluted coastal sites in Europe(Bagnoli-Coroglio bay,Mediterranean Sea),using the L...This study compares the environmental sustainability of five alternatives for the remediation of marine sediments of one of the most polluted coastal sites in Europe(Bagnoli-Coroglio bay,Mediterranean Sea),using the Life Cycle Assessment(LCA)methodology.The treatments are either in-situ or exsitu,the latter requiring an initial dredging to transport the contaminated sediments to the management site.More in detail,four ex-situ remediation technologies based on landfilling,bioremediation,electrokinetic technique and soil washing were identified.These technologies are compared to an in-situ strategy currently under validation for enhancing bioremediation of the polluted sediments of the Bagnoli-Coroglio site.Our results indicate that the disposal in landfilling site is the worst option in most categories(e.g.,650 kg CO_(2) eq./t of treated sediment,considering the nearest landfilling site),followed by the bioremediation,mainly due to the high energy demand.Electrokinetic remediation,soil washing,and innovative in-situ technology represent the most sustainable options.In particular,the new in-situ technology appears to be the least impacting in all categories(e.g.,54 kg CO_(2) eq./t of treated sediment),although it is expected to require longer treatment time(estimated up to 12 months based on its potential efficiency).It can reduce the impact on climate change more than 12 times compared to the disposal and 7 times compared to bioremediation in addition to the possibility to avoid/reduce the dredging operations and the consequent dispersion of pollutants.The results open relevant perspectives towards more eco-sustainable and costly effective actions for the reclamation of contaminated marine sediments.展开更多
The effective and environmentally friendly management of oily wastewater,alongside the beneficial conversion of waste biomass,holds paramount importance for environmental conservation,public health,and sustainable soc...The effective and environmentally friendly management of oily wastewater,alongside the beneficial conversion of waste biomass,holds paramount importance for environmental conservation,public health,and sustainable societal progress.In this research,an innovative biomass core-shell bioreactor(CGC@SiO_(2) aerogel) with selective adsorption and degradation properties was developed.The reactor's core is composed of coffee cellulose aerogel,offering a porous framework conducive to microbial colonization while safeguarding microorganisms from adverse external factors.The shell integrates hydrophobic silica enriched with polydimethylsiloxane,which alters the material's hydrophilic properties,enabling it to remain afloat on water for up to 100 days.This superhydrophobic layer maintained a contact angle of 150° even after ten consecutive rubbings.Experimental results indicate that the material performs exceptionally well in oil-water separation,as demonstrated by its success in 9 consecutive oil-water separations.It achieved 99 % selective adsorption,91 % removal,and 46.2 % degradation of a 3 wt.% diesel solution under conditions of 37℃,120 r/min,and pH=7.Additionally,tests assessing environmental tolerance revealed the material's robust adaptability and stability across varying pH levels and temperatures.Compared to traditional hydrophobic and lipophilic materials or free-floating microorganisms,CGC@SiO2 aerogel not only efficiently captures oil pollutants but also degrades them into non-hazardous substances.Combining biodegradation with selective adsorption has shown to be an effective approach for treating oily wastewater,offering significant practical application potential.The low-carbon production of CGC@SiO2aerogel aligns with circular economy principles,underscoring its role in sustainable development.展开更多
The remediation of arsenic(As)-contaminated soil is essential for achieving sustainable environmental and agricultural development.Among various techniques,soil washing has emerged as a promising method due to its rap...The remediation of arsenic(As)-contaminated soil is essential for achieving sustainable environmental and agricultural development.Among various techniques,soil washing has emerged as a promising method due to its rapid,efficient,and thorough decontamination capabilities.This review critically examines the application of soil washing technology in the treatment of As-contaminated soil.Specifically,this paper discusses the mechanisms of four types of washing agents(inorganic detergents,chelating agents,surfactants,and microbial agents),focusing on processes such as acid dissolution,electrostatic interaction,ion exchange,and chelation,and the factors affecting washing efficiency.The concentration of washing agent and the initial p H are the key factors influencing the washing effect.The paper also summarizes the application conditions and the corresponding removal rates for different individual washing agents and compares their effectiveness,biodegradability,and environmental impacts.Among these,natural chelating agents are highlighted for their promising potential in As removal.While individual washing agents show certain effectiveness,the combined use of multiple washing agents and the optimization of washing sequence are necessary to achieve superior remediation outcomes.The synergistic effects of combining natural chelating agents with reducing agents,surfactants,and inorganic washing agents,as well as the integration of nanomaterials with chelating agents and microbial agents are summarized,demonstrating their efficiency and stability in soil remediation.By reviewing the current state of research,this paper provides essential insights for the selection of washing agents and the optimization of washing parameters in the remediation of As-contaminated soil.展开更多
Atrazine,a persistent triazine herbicide,poses environmental and health risks.This study examines the synergis-tic remediation of atrazine-contaminated soil using green manure plant(GMP)hairy vetch(Vicia villosa Roth,...Atrazine,a persistent triazine herbicide,poses environmental and health risks.This study examines the synergis-tic remediation of atrazine-contaminated soil using green manure plant(GMP)hairy vetch(Vicia villosa Roth,VV)and the exogenous atrazine-degrading bacterium Arthrobacter sp.ATR1.Soil samples contaminated with atrazine at 5 and 20 mg/kg were treated with control(CK),ATR1(CKatr),hairy vetch(VV),and combined hairy vetch and ATR1 remediation(VVatr).The results indicated that the VVatr treatment exhibited the most effective atrazine removal,achieving enhancements of 56.12%at 5 mg/kg and 54.51%at 20 mg/kg compared to CK after 28 days.Soil enzyme activities,including urease,sucrase,and alkaline phosphatase,were significantly elevated in the VV and VVatr treatments,contributing to improved soil quality.Additionally,the CKatr,VV,and VVatr treat-ments enhanced bacterial diversity and richness while altering the microbial community structure.The VV and VVatr treatments notably enriched indigenous atrazine-degrading bacteria and nitrogen-fixing bacteria in the rhizosphere.This microbial enrichment upregulated the Atrazine degradation and Nitrogen metabolism pathways,facilitating both atrazine removal and nitrogen cycling in the soil.And VVatr treatment promoted the stability of the microbial network and enhanced the cooperative relationship between key indigenous atrazine-degrading and nitrogen-fixing bacteria.These findings explain the mechanism of plantmicrobe combined remediation of atrazine-contaminated soil from the perspective of rhizosphere microorganisms and offer a theoretical basis for the practical application of this method.展开更多
Immobilized microalgae technologies(IMTs)involve the fixing of free-living microalgae onto specialized carriers through physical adsorption,chemical cross-linking,or biological interactions to enhance cell retention,m...Immobilized microalgae technologies(IMTs)involve the fixing of free-living microalgae onto specialized carriers through physical adsorption,chemical cross-linking,or biological interactions to enhance cell retention,metabolic stability,and stress resistance.These have emerged as multifunctional and sustainable platforms for environmental remediation,extending their applications beyond wastewater treatment to include soil and air purification.This review categorizes advanced IMT carriers into three major types:(1)inorganic engineered materials(e.g.,biochar-nanoparticle hybrids),(2)functionalized organic polymers(e.g.,pH-responsive hydrogels),and(3)bio-derived scaffolds(e.g.,fungal-algal and algal-bacterial consortia).They enhance microalgal retention,metabolic activity,and microalgal stress resistance,enabling the effective removal of nitrogen,phosphorus,heavy metals,organic pollutants,and airborne particulates across diverse environmental matrices.We highlight key cooperative mechanisms—such as extracellular polymeric substance(EPS)-mediated adhesion,quorum sensing,and metabolic synergy—that underpin pollutant removal and biomass stability.Particular emphasis is placed on integrating smart technologies,including magnetic microrobots,3D/4D-printed scaffolds,and AI-guided optimization,which improve the scalability,adaptability,and environmental responsiveness of IMT systems.By synthesizing the advances in materials science,microbial ecology,and environmental engineering,this review defines the future direction of research into IMTs as a next-generation bioengineering strategy for the integrated management of water,soil,and air pollution.展开更多
Soil contaminated with heavy metals is a global health hazard.Nanomaterials,with their unique physical and chemical properties,hold significant potential for the remediation of soil polluted with heavy metals.They eff...Soil contaminated with heavy metals is a global health hazard.Nanomaterials,with their unique physical and chemical properties,hold significant potential for the remediation of soil polluted with heavy metals.They effectively reduce the mobility and bioavailability of heavy metals through various mechanisms such as adsorption,precipitation,and oxidation-reduction.This paper provides an in-depth exploration of the cuttingedge applications of various nanomaterials,including nanometallic,nano non-metallic materials,nanoclay and mineral materials,and nano modified biochar materials,in the remediation of heavy metal-contaminated soils.It specifically focuses on the key factors influencing the remediation efficacy of these nanomaterials,as well as the underlying remediation mechanisms and methods for performance optimization.The aims of this paper are to provide guidance for the further application of nanomaterials in the field of soil heavy metal remediation,and to offer insights that could promote the effective control of soil heavy metal pollution.展开更多
Vulnerabilities are a known problem in modern Open Source Software(OSS).Most developers often rely on third-party libraries to accelerate feature implementation.However,these libraries may contain vulnerabilities that...Vulnerabilities are a known problem in modern Open Source Software(OSS).Most developers often rely on third-party libraries to accelerate feature implementation.However,these libraries may contain vulnerabilities that attackers can exploit to propagate malicious code,posing security risks to dependent projects.Existing research addresses these challenges through Software Composition Analysis(SCA)for vulnerability detection and remediation.Nevertheless,current solutions may introduce additional issues,such as incompatibilities,dependency conflicts,and additional vulnerabilities.To address this,we propose Vulnerability Scan and Protection(VulnScanPro),a robust solution for detection and remediation vulnerabilities in Java projects.Specifically,VulnScanPro builds a finegrained method graph to identify unreachable methods.The method graph is mapped to the project’s dependency tree,constructing a comprehensive vulnerability propagation graph that identifies unreachable vulnerable APIs and dependencies.Based on this analysis,we propose three solutions for vulnerability remediation:(1)Removing unreachable vulnerable dependencies,thereby resolving security risks and reducing maintenance overhead.(2)Upgrading vulnerable dependencies to the closest non-vulnerable versions,while pinning the versions of transitive dependencies introduced by the vulnerable dependency,in order to mitigate compatibility issues and prevent the introduction of new vulnerabilities.(3)Eliminating unreachable vulnerable APIs,particularly when security patches are either incompatible or absent.Experimental results show that these solutions effectively mitigate vulnerabilities and enhance the overall security of the project.展开更多
The accumulation of refractory organics in Bayer liquor(pH 14.4)critically compromises aluminum production efficiency and product quality,necessitating sustainable remediation strategies.Herein,we develop an ultrasoni...The accumulation of refractory organics in Bayer liquor(pH 14.4)critically compromises aluminum production efficiency and product quality,necessitating sustainable remediation strategies.Herein,we develop an ultrasonic-driven catalytic ozonation system with dynamically reconstructed CuO/Cu2O heterointerfaces,achieving unprecedented efficiency in extreme alkaline wastewater treatment.Atomic-scale interface engineering endows the catalyst with hydrophilicity(contact angle:6.1°)and 3.8–4.3 times higher oxygen vacancy density compared to single-phase catalysts.These properties facilitate efficient interfacial interactions with Bayer liquor and enable superior ozone activation through synergistic Cu(I)/Cu(II)redox cycling across the heterointerface.This interfacial synergy reduces ozone adsorption energy from 5.46 eV(Cu_(2)O)to 1.48 eV,driving the generation of reactive oxygen species(ROS)via low-energy pathways.Under optimized conditions,the system achieves 57.82%TOC removal within 1.5 h with 2.3-fold faster kinetics than ozone–alone processes,while improving energy efficiency by 1.82–3.22 times per kWh over conventional thermal oxidation.Remarkable stability is demonstrated through 80.21%activity retention after 6 cycles,attributed to surface energy minimization(0.61 J m^(−2)),alongside 67.91%hydroxyl radical(•OH)-mediated degradation confirmed by quenching tests.In XPS,EEMs analysis,and ECOSAR modeling further elucidate the surface reconstruction mechanism and intermediate toxicity reduction.This work establishes an atomic interface design paradigm that bridges catalytic innovation with green metallurgy applications,offering a sustainable solution for industrial wastewater remediation aligned with circular economy principles.展开更多
Heavy metal contamination of soil is one of the major challenges to sustainable agriculture.This contamination can be transmitted through the soil food chain and poses a serious threat to human health.In this study,we...Heavy metal contamination of soil is one of the major challenges to sustainable agriculture.This contamination can be transmitted through the soil food chain and poses a serious threat to human health.In this study,we found that freeze-thaw leaching(FTL)effectively complements the low removal rate of chemical leaching,and investigated the effects of different numbers of FTL on Cd contamination,soil chemical properties and microbial communities.The results showed that repeated FTL significantly reduced(P<0.05)the total Cd content in the top soil(19.02%-49.35%)and subsoil(0.41%-21.13%)and promoted the transformation of Cd to a more stable form,mainly through various removal mechanisms such as complexation,ion-exchange,and chemical precipitation.This finding was supported by reductions in several soil properties,including pH,available potassium(AK),and available phosphorus(AP).FTL treatment initially increased the bioavailability of Cd compared to chemical leaching,but bioavailability of Cd progressively decreased as the number of freeze-thaw cycles increased.Additionally,FTL reduced the richness and diversity of bacteria communities,destabilized ecological symbiotic networks,while increasing the richness and diversity of fungi in the soil.Various model analyses indicated that FTL treatment,available Cd,soil pH,AP and AK were the key drivers influencing the changes in microbial community structure.This study provides new insights and scientific bases for the effective management of heavy metal pollution in agricultural soils,the restoration of ecosystem health,and the improvement of soil sustainability.展开更多
Rice cultivation,vital to global food security and the United Nations Sustainable Development Goals(SDGs),faces increasing threats from industrial pollution,which contaminates soil and water,endangers human health,and...Rice cultivation,vital to global food security and the United Nations Sustainable Development Goals(SDGs),faces increasing threats from industrial pollution,which contaminates soil and water,endangers human health,and weakens agricultural resilience.Studies indicate that contaminants such as persistent organic pollutants,radioactive elements,dyes,and potentially toxic elements,particularly from mining and industrial activities,significantly degrade soil fertility,impair plant health,and introduce harmful residues into the food chain.This contamination compromises food safety and diminishes agricultural productivity,posing a serious challenge to sustainability.Addressing these impacts requires sustainable industrial practices,advanced technologies,and eco-friendly remediation techniques.Solutions like biochar applications,precision farming,and artificial intelligence(AI)-driven pollution detection provide effective measures for restoring soil health,protecting crop integrity,and ensuring the resilience of rice farming.These approaches align rice cultivation with global sustainability goals by integrating sustainable soil and water management,adaptive crop selection,and AI innovations.Protecting rice cultivation upholds farmer livelihoods and strengthens global commitments to SDGs Zero Hunger and a resilient,safe food supply,underscoring the essential balance between industrial progress and sustainable rice cultivation.展开更多
Heavy metal pollution seriously threatens global rice production and food security.Arbuscular mycorrhizal fungi(AMF)can alleviate heavy metal stress in rice.To summarize existing research and propose new research dire...Heavy metal pollution seriously threatens global rice production and food security.Arbuscular mycorrhizal fungi(AMF)can alleviate heavy metal stress in rice.To summarize existing research and propose new research directions,this review outlines the current status of heavy metal pollution from perspectives including general pollution situation,soil heavy metal pollution,water heavy metal pollution,and paddy field heavy metal pollution.This paper also synthesizes the negative impacts of heavy metal stress on rice growth in terms of morphological indicators,photosynthesis,redox balance,and nutritional metabolism.It also analyzes the mechanisms by which AMF alleviate heavy metal stress in rice,induding physiological as and biochemical regulatory mechanisms,as well as molecular and genetic regulatory mechanisms.Furthermore,this paper provides research perspectives regarding integration with genetic engineering and breeding technologies,applications under combined stress conditions,and technological integration with field application promotion,aiming to establish a theoretical foundation for further research in ecological restoration and safe utilization of heavy metal-contaminated paddy fields.展开更多
Salt-affected soils urgently need to be remediated to achieve the goals of carbon neutrality and food security.Limited reviews are available on biochar performance in remediating salt-affected soils in the context of ...Salt-affected soils urgently need to be remediated to achieve the goals of carbon neutrality and food security.Limited reviews are available on biochar performance in remediating salt-affected soils in the context of carbon neutrality and climate change mitigation.This work summarized the two pathways to achieve carbon neutrality during remediating salt-affected soils using biochars,i.e.,biochar production from sustainable feedstock using thermal technologies,application for promoting plant productivity and mitigating greenhouse gas(GHG)emission.Converting biomass wastes into biochars can reduce GHG emission and promote carbon dioxide removal(CDR),and collection of halophyte biomass as biochar feedstocks,development of biochar poly-generation production systems with carbon neutrality or negativity could be promising strategies.Biochar can effectively improve plant growth in salt-affected soils,showing that the grand mean of plant productivity response was 29.3%,via improving physicochemical characteristics,shifting microbial communities,and enhancing plant halotolerance.Moreover,biochar can mitigate GHG emission via inducing negative priming effect,improving soil properties,changing microbial communities associated with carbon and nitrogen cycle,direct adsorption of GHG.However,biochar also may pose negative effects on plant growth because of stress of toxic compounds and free radicals,and deterioration of soil properties.The promoted GHG emission is mainly ascribed to positive priming effect,and provision of labile carbon and inorganic nitrogen fractions as microbial substrates.Finally,this review pointed out the gaps in the current studies and the future perspectives.Particularly,the development of“carbon neutral”or“carbon negative”biochar production system,balancing the relationship of biochar effectiveness and functionality with its environmental risks and costs,and designing biochar-based GHG adsorbents would be important directions for remediating salt-affected soils to achieve carbon neutrality and abate climate change.展开更多
Biochar has been proposed as a soil amendment to reclaim salt-affected soils.However,the evaluation of the different biochar types in these soils is essential due to the significant variation among biochar feedstocks....Biochar has been proposed as a soil amendment to reclaim salt-affected soils.However,the evaluation of the different biochar types in these soils is essential due to the significant variation among biochar feedstocks.In this study,biochars from sugarcane bagasse(SB),orange bagasse(OB),and corncob(CB)were applied alone and in the presence of gypsum(G)to test their potential to remediate a highly degraded saline-sodic soil in Brazil´s Northeast region.For that,we conducted a laboratory column-leaching experiment and a greenhouse study.After the column-leaching test,we analyzed the sodium adsorption ratio(SAR),the electrical conductivity of the saturation extract(ECe),the concentrations of major ions,and the exchangeable sodium percentage(ESP).Maize plants were grown in the leached soil in a greenhouse.Sugarcane-and corncob-derived biochars were more efficient than gypsum in reducing the soil salinity,bringing the indicators below threshold values,and optimizing soil reclamation time.Soil ECe,SAR,and ESP were reduced to 3.42 dS m−1,1.64(mmolc dm−3)0.5 and 4.86%,respectively,in the SB treatment;and to 3.19 dS m−1,0.88(mmolc dm−3)0.5 and 2.53%,respectively,in the CB treatment.Orange bagasse biochar did not effectively reduce the salinity indicators.All biochar treatments improved seed germination and plant growth.The SB,CB,SBG,and CBG treatments increased plant height(478–558%),shoot mass(783–983%),and root mass(386–500%),respectively.Therefore,the application of SB and CB is an effective alternative to remediate saline-sodic soils and to reduce the impact of soil salinity in the environment.展开更多
Biochar is a promising material for soil remediation.However,most studies testing the roles of biochar in soil remediation have considered the use of single types of biochar,and the role of biochar diversity,as well a...Biochar is a promising material for soil remediation.However,most studies testing the roles of biochar in soil remediation have considered the use of single types of biochar,and the role of biochar diversity,as well as its interaction with species diversity of plant communities,has rarely been considered.We hypothesize that biochar diversity can infuence the impacts of plant diversity on soil remediation.We grew grassland communities consisting of three or six plant species in cadmium(Cd)-contaminated soil mixed with one,two or four types of biochar,with no grassland community and no biochar addition as the controls.Without plant communities or with communities consisting of three species,total Cd was signifcantly lower in the soil mixed with four types of biochar than in the soil without biochar or mixed with one or two types of biochar.With communities consisting of six species,total Cd decreased with the increasing number of biochar types.Without biochar addition,soil total Cd was not infuenced by species richness,but with biochar addition,it was lower in the presence of communities with six species than in the absence of plant communities irrespective of how many types of biochar were added.Also,soil total Cd was lower in the presence of communities with six than with three plant species when two or four types of biochar were added.Our study indicates that increasing biochar diversity can promote the impact of plant diversity on remediating soil contaminated by heavy metals such as Cd.展开更多
S and Co co-doped carbon catalysts were prepared via pyrolysis of MOF-71 and thiourea mixtures at 800℃at a mass ratio of MOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PMS)for methylene blue(MB...S and Co co-doped carbon catalysts were prepared via pyrolysis of MOF-71 and thiourea mixtures at 800℃at a mass ratio of MOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PMS)for methylene blue(MB)degradation.The effects of two different mixing routes were identified on the MB degradation performance.Particularly,the catalyst obtained by the alcohol solvent evaporation(MOF-AEP)mixing route could degrade 95.60%MB(50 mg/L)within 4 min(degradation rate:K=0.78 min^(-1)),which was faster than that derived from the direct grinding method(MOF-DGP,80.97%,K=0.39 min^(-1)).X-ray photoelectron spectroscopy revealed that the Co-S content of MOF-AEP(43.39at%)was less than that of MOF-DGP(54.73at%),and the proportion of C-S-C in MOF-AEP(13.56at%)was higher than that of MOF-DGP(10.67at%).Density functional theory calculations revealed that the adsorption energy of Co for PMS was -2.94 eV when sulfur was doped as C-S-C on the carbon skeleton,which was higher than that when sulfur was doped next to cobalt in the form of Co-S bond(-2.86 eV).Thus,the C-S-C sites might provide more contributions to activate PMS compared with Co-S.Furthermore,the degradation parameters,including pH and MOF-AEP dosage,were investigated.Finally,radical quenching experiments and electron paramagnetic resonance(EPR)measurements revealed that ^(1)O_(2)might be the primary catalytic species,whereas·O~(2-)might be the secondary one in degrading MB.展开更多
Controlling heavy metal pollution in agricultural soil has been a significant challenge.These heavy metals seriously threaten the surrounding ecological environment and human health.The effective assessment and remedi...Controlling heavy metal pollution in agricultural soil has been a significant challenge.These heavy metals seriously threaten the surrounding ecological environment and human health.The effective assessment and remediation of heavy metals in agricultural soils are crucial.These two aspects support each other,forming a close and complete decisionmaking chain.Therefore,this review systematically summarizes the distribution characteristics of soil heavy metal pollution,the correlation between soil and crop heavy metal contents,the presence pattern and migration and transformation mode of heavy metals in the soil-crop system.The advantages and disadvantages of the risk evaluation tools and models of heavy metal pollution in farmland are further outlined,which provides important guidance for an in-depth understanding of the characteristics of heavymetal pollution in farmland soils and the assessment of the environmental risk.Soil remediation strategies involve multiple physical,chemical,biological and even combined technologies,and this paper compares the potential and effect of the above current remediation technologies in heavy metal polluted farmland soils.Finally,the main problems and possible research directions of future heavy metal risk assessment and remediation technologies in agricultural soils are prospected.This review provides new ideas for effective assessment and selection of remediation technologies based on the characterization of soil heavy metals.展开更多
New pollutants have become a significant concern in China's efforts toward ecological and environmental protection.Trichloromethane(TCM,CHCl_3),one of these new pollutants,is primarily released into soil and groun...New pollutants have become a significant concern in China's efforts toward ecological and environmental protection.Trichloromethane(TCM,CHCl_3),one of these new pollutants,is primarily released into soil and groundwater through various industrial activities.Over the past four decades,researchers have consistently focused on the remediation of TCM-contaminated soil and groundwater using microorganisms and iron-based materials,which hold significant potential for practical application.Understanding the remediation process and the factors influencing TCM degradation through these two methods is crucial for advancing both theoretical research and practical implementation.This review focuses on the degradation mechanisms of TCM in soil and groundwater by microorganisms and iron-based materials.It summarizes the active microorganisms and modified iron-based materials with high TCM degradation capabilities,discusses enhancement measures for both methods in the remediation process,and finally,outlines the challenges faced by these methods.The goal is to provide theoretical references for efficient remediation of TCM-contaminated soil and groundwater.展开更多
Pollution accident of nonferrous metallurgy industry often lead to serious heavy metal pollution of the surrounding soil.Phytoremediation of contaminated soil is an environmental and sustainable technology,and soil na...Pollution accident of nonferrous metallurgy industry often lead to serious heavy metal pollution of the surrounding soil.Phytoremediation of contaminated soil is an environmental and sustainable technology,and soil native microorganisms in the process of phytoremediation also participate in the remediation of heavy metals.However,the effects of high concentrations of multiple heavy metals(HCMHMs)on plants and native soil microorganisms remain uncertain.Thus,further clarification of themechanism of phytoremediation of HCMHMs soil by plants and native soil microorganisms is required.Using the plant Sedum alfredii(S.alfredii)to restore HCMHM-contaminated soil,we further explored the mechanism of S.alfredii and native soil microorganisms in the remediation of HCMHM soils.The results showed that(i)S.alfredii can promote heavy metals from non-rhizosphere soil to rhizosphere soil,which is conducive to the effect of plants on heavy metals.In addition,it can also enrich the absorbed heavy metals in its roots and leaves;(ii)native soil bacteria can increase the abundance of signal molecule-synthesizing enzymes,such as trpE,trpG,bjaI,rpfF,ACSL,and yidC,and promote the expression of the pathway that converts serine to cysteine,then synthesize substances to chelate heavy metals.In addition,we speculated that genes such as K19703,K07891,K09711,K19703,K07891,and K09711 in native bacteria may be involved in the stabilization or absorption of heavy metals.The results provide scientific basis for S.alfredii to remediate heavy metals contaminated soils,and confirm the potential of phytoremediation of HCMHM contaminated soil.展开更多
Agricultural soil is related to food security and human health,antibiotics and heavy metals(HMs),as two typical pollutants,possess a high coexistence rate in the environmental medium,which is extremely prone to induci...Agricultural soil is related to food security and human health,antibiotics and heavy metals(HMs),as two typical pollutants,possess a high coexistence rate in the environmental medium,which is extremely prone to inducing antibiotic-HMs combined pollution.Recently,frequent human activities have led to more prominent antibiotics-HMs combined contamination in agricultural soils,especially the production and spread of antibiotic resistance genes(ARGs),heavy metal resistance genes(MRGs),antibiotic resistant bacteria(ARB),and antibiotics-HMs complexes(AMCs),which seriously threaten soil ecology and human health.This review describes the main sources(Intrinsic and manmade sources),composite mechanisms(co-selective resistance,oxidative stress,and Joint toxicity mechanism),environmental fate and the potential risks(soil ecological and human health risks)of antibiotics and HMs in agricultural soils.Finally,the current effective source blocking,transmission control,and attenuation strategies are classified for discussion,such as the application of additives and barrier materials,as well as plant and animal remediation and bioremediation,etc.,pointing out that future research should focus on the whole chain process of“source-processterminal”,intending to provide a theoretical basis and decision-making reference for future research.展开更多
High-altitude pulmonary hypertension(HAPH)occurs when blood pressure in the pulmonary arteries rises due to exposure to high altitudes above 2,500 m.At these elevations,reduced atmospheric pressure leads to lower oxyg...High-altitude pulmonary hypertension(HAPH)occurs when blood pressure in the pulmonary arteries rises due to exposure to high altitudes above 2,500 m.At these elevations,reduced atmospheric pressure leads to lower oxygen levels,triggering a series of physiological responses,including pulmonary artery constriction,which elevates blood pressure.This review explored the complex pathophysiological mechanisms of HAPH and reviewed current pharmaceutical interventions for its management.Meanwhile,this review particularly emphasized on the emerging research concerning Chinese medicinal plants as potential treatments for HAPH.Traditional Chinese medicines are rich in diverse natural ingredients that show significant promise in alleviating HAPH symptoms.We reviewed both in vitro and in vivo studies to assess the efficacy,safety,and mechanisms of these natural medicines,along with their potential adverse effects.Additionally,this review highlighted new alternative natural remedies,underscoring the need for ongoing research to expand available treatment options for HAPH.展开更多
基金support in the literature analysis.This study has been carried out in the framework of the project funded by EU entitled“Bioremediation of contaminated sediments in coastal areas of exindustrial sites-LIFE SEDREMED”(No.LIFE20 ENV/IT/000572).
文摘This study compares the environmental sustainability of five alternatives for the remediation of marine sediments of one of the most polluted coastal sites in Europe(Bagnoli-Coroglio bay,Mediterranean Sea),using the Life Cycle Assessment(LCA)methodology.The treatments are either in-situ or exsitu,the latter requiring an initial dredging to transport the contaminated sediments to the management site.More in detail,four ex-situ remediation technologies based on landfilling,bioremediation,electrokinetic technique and soil washing were identified.These technologies are compared to an in-situ strategy currently under validation for enhancing bioremediation of the polluted sediments of the Bagnoli-Coroglio site.Our results indicate that the disposal in landfilling site is the worst option in most categories(e.g.,650 kg CO_(2) eq./t of treated sediment,considering the nearest landfilling site),followed by the bioremediation,mainly due to the high energy demand.Electrokinetic remediation,soil washing,and innovative in-situ technology represent the most sustainable options.In particular,the new in-situ technology appears to be the least impacting in all categories(e.g.,54 kg CO_(2) eq./t of treated sediment),although it is expected to require longer treatment time(estimated up to 12 months based on its potential efficiency).It can reduce the impact on climate change more than 12 times compared to the disposal and 7 times compared to bioremediation in addition to the possibility to avoid/reduce the dredging operations and the consequent dispersion of pollutants.The results open relevant perspectives towards more eco-sustainable and costly effective actions for the reclamation of contaminated marine sediments.
基金supported by the National Natural Science Foundation of China(Nos.22365026 and 21966028)the Science and Technology Project of Gansu(No.21YF5GA062)+3 种基金the Fundamental Research Funds for the Central Universities(Nos.31920220043,31920240094,and 31920230142)the Education Department of Gansu Province:Excellent Graduate student“Innovation Star”project(No.2023CXZX-202)Gansu Province Science Foundation for Youths(No.24JRRA160)the Funds for Special Projects of the Central Government in Guidance of Local Science and Technology Development(No.24ZY1QA026).
文摘The effective and environmentally friendly management of oily wastewater,alongside the beneficial conversion of waste biomass,holds paramount importance for environmental conservation,public health,and sustainable societal progress.In this research,an innovative biomass core-shell bioreactor(CGC@SiO_(2) aerogel) with selective adsorption and degradation properties was developed.The reactor's core is composed of coffee cellulose aerogel,offering a porous framework conducive to microbial colonization while safeguarding microorganisms from adverse external factors.The shell integrates hydrophobic silica enriched with polydimethylsiloxane,which alters the material's hydrophilic properties,enabling it to remain afloat on water for up to 100 days.This superhydrophobic layer maintained a contact angle of 150° even after ten consecutive rubbings.Experimental results indicate that the material performs exceptionally well in oil-water separation,as demonstrated by its success in 9 consecutive oil-water separations.It achieved 99 % selective adsorption,91 % removal,and 46.2 % degradation of a 3 wt.% diesel solution under conditions of 37℃,120 r/min,and pH=7.Additionally,tests assessing environmental tolerance revealed the material's robust adaptability and stability across varying pH levels and temperatures.Compared to traditional hydrophobic and lipophilic materials or free-floating microorganisms,CGC@SiO2 aerogel not only efficiently captures oil pollutants but also degrades them into non-hazardous substances.Combining biodegradation with selective adsorption has shown to be an effective approach for treating oily wastewater,offering significant practical application potential.The low-carbon production of CGC@SiO2aerogel aligns with circular economy principles,underscoring its role in sustainable development.
基金supported by the National Key R&D Program of China(No.2023YFC3706703)the National Natural Science Foundation of China(No.51874018)。
文摘The remediation of arsenic(As)-contaminated soil is essential for achieving sustainable environmental and agricultural development.Among various techniques,soil washing has emerged as a promising method due to its rapid,efficient,and thorough decontamination capabilities.This review critically examines the application of soil washing technology in the treatment of As-contaminated soil.Specifically,this paper discusses the mechanisms of four types of washing agents(inorganic detergents,chelating agents,surfactants,and microbial agents),focusing on processes such as acid dissolution,electrostatic interaction,ion exchange,and chelation,and the factors affecting washing efficiency.The concentration of washing agent and the initial p H are the key factors influencing the washing effect.The paper also summarizes the application conditions and the corresponding removal rates for different individual washing agents and compares their effectiveness,biodegradability,and environmental impacts.Among these,natural chelating agents are highlighted for their promising potential in As removal.While individual washing agents show certain effectiveness,the combined use of multiple washing agents and the optimization of washing sequence are necessary to achieve superior remediation outcomes.The synergistic effects of combining natural chelating agents with reducing agents,surfactants,and inorganic washing agents,as well as the integration of nanomaterials with chelating agents and microbial agents are summarized,demonstrating their efficiency and stability in soil remediation.By reviewing the current state of research,this paper provides essential insights for the selection of washing agents and the optimization of washing parameters in the remediation of As-contaminated soil.
基金supported by the National Key Research and Development Program of China(No.2024YFD1701101)the Fund for Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA28010503)+2 种基金the National Natural Science Foundation of China(No.31971515)the Fund for National Key Research and Development Plan of China(No.2019YFC1804100)the Fund for Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(No.CAAS-ZDRW202110).
文摘Atrazine,a persistent triazine herbicide,poses environmental and health risks.This study examines the synergis-tic remediation of atrazine-contaminated soil using green manure plant(GMP)hairy vetch(Vicia villosa Roth,VV)and the exogenous atrazine-degrading bacterium Arthrobacter sp.ATR1.Soil samples contaminated with atrazine at 5 and 20 mg/kg were treated with control(CK),ATR1(CKatr),hairy vetch(VV),and combined hairy vetch and ATR1 remediation(VVatr).The results indicated that the VVatr treatment exhibited the most effective atrazine removal,achieving enhancements of 56.12%at 5 mg/kg and 54.51%at 20 mg/kg compared to CK after 28 days.Soil enzyme activities,including urease,sucrase,and alkaline phosphatase,were significantly elevated in the VV and VVatr treatments,contributing to improved soil quality.Additionally,the CKatr,VV,and VVatr treat-ments enhanced bacterial diversity and richness while altering the microbial community structure.The VV and VVatr treatments notably enriched indigenous atrazine-degrading bacteria and nitrogen-fixing bacteria in the rhizosphere.This microbial enrichment upregulated the Atrazine degradation and Nitrogen metabolism pathways,facilitating both atrazine removal and nitrogen cycling in the soil.And VVatr treatment promoted the stability of the microbial network and enhanced the cooperative relationship between key indigenous atrazine-degrading and nitrogen-fixing bacteria.These findings explain the mechanism of plantmicrobe combined remediation of atrazine-contaminated soil from the perspective of rhizosphere microorganisms and offer a theoretical basis for the practical application of this method.
基金supported by the National Natural Science Foundation of China(No.32202158).
文摘Immobilized microalgae technologies(IMTs)involve the fixing of free-living microalgae onto specialized carriers through physical adsorption,chemical cross-linking,or biological interactions to enhance cell retention,metabolic stability,and stress resistance.These have emerged as multifunctional and sustainable platforms for environmental remediation,extending their applications beyond wastewater treatment to include soil and air purification.This review categorizes advanced IMT carriers into three major types:(1)inorganic engineered materials(e.g.,biochar-nanoparticle hybrids),(2)functionalized organic polymers(e.g.,pH-responsive hydrogels),and(3)bio-derived scaffolds(e.g.,fungal-algal and algal-bacterial consortia).They enhance microalgal retention,metabolic activity,and microalgal stress resistance,enabling the effective removal of nitrogen,phosphorus,heavy metals,organic pollutants,and airborne particulates across diverse environmental matrices.We highlight key cooperative mechanisms—such as extracellular polymeric substance(EPS)-mediated adhesion,quorum sensing,and metabolic synergy—that underpin pollutant removal and biomass stability.Particular emphasis is placed on integrating smart technologies,including magnetic microrobots,3D/4D-printed scaffolds,and AI-guided optimization,which improve the scalability,adaptability,and environmental responsiveness of IMT systems.By synthesizing the advances in materials science,microbial ecology,and environmental engineering,this review defines the future direction of research into IMTs as a next-generation bioengineering strategy for the integrated management of water,soil,and air pollution.
基金the Natural Science Research Initiation Fund Project of China West Normal University(No.23KE001)the National Natural Science Foundation of China(Nos.42407186,42277033,and 42171045)+1 种基金the Basic Research Foundation of Yunnan Province(No.202401AT070304)the Central Public-interest Scientific Institution Basal Research Fund(No.Y2024QC28)for their financial support。
文摘Soil contaminated with heavy metals is a global health hazard.Nanomaterials,with their unique physical and chemical properties,hold significant potential for the remediation of soil polluted with heavy metals.They effectively reduce the mobility and bioavailability of heavy metals through various mechanisms such as adsorption,precipitation,and oxidation-reduction.This paper provides an in-depth exploration of the cuttingedge applications of various nanomaterials,including nanometallic,nano non-metallic materials,nanoclay and mineral materials,and nano modified biochar materials,in the remediation of heavy metal-contaminated soils.It specifically focuses on the key factors influencing the remediation efficacy of these nanomaterials,as well as the underlying remediation mechanisms and methods for performance optimization.The aims of this paper are to provide guidance for the further application of nanomaterials in the field of soil heavy metal remediation,and to offer insights that could promote the effective control of soil heavy metal pollution.
基金supported by the National Natural Science Foundation of China(Grant No.62141210)the Fundamental Research Funds for the Central Universities(Grant No.N2217005)+1 种基金Open Fund of State Key Lab.for Novel Software Technology,Nanjing University(KFKT2021B01)111 Project(B16009).
文摘Vulnerabilities are a known problem in modern Open Source Software(OSS).Most developers often rely on third-party libraries to accelerate feature implementation.However,these libraries may contain vulnerabilities that attackers can exploit to propagate malicious code,posing security risks to dependent projects.Existing research addresses these challenges through Software Composition Analysis(SCA)for vulnerability detection and remediation.Nevertheless,current solutions may introduce additional issues,such as incompatibilities,dependency conflicts,and additional vulnerabilities.To address this,we propose Vulnerability Scan and Protection(VulnScanPro),a robust solution for detection and remediation vulnerabilities in Java projects.Specifically,VulnScanPro builds a finegrained method graph to identify unreachable methods.The method graph is mapped to the project’s dependency tree,constructing a comprehensive vulnerability propagation graph that identifies unreachable vulnerable APIs and dependencies.Based on this analysis,we propose three solutions for vulnerability remediation:(1)Removing unreachable vulnerable dependencies,thereby resolving security risks and reducing maintenance overhead.(2)Upgrading vulnerable dependencies to the closest non-vulnerable versions,while pinning the versions of transitive dependencies introduced by the vulnerable dependency,in order to mitigate compatibility issues and prevent the introduction of new vulnerabilities.(3)Eliminating unreachable vulnerable APIs,particularly when security patches are either incompatible or absent.Experimental results show that these solutions effectively mitigate vulnerabilities and enhance the overall security of the project.
基金supported by Yunnan Major Scientific and Technological Projects (Grant No. 202402AB080004)Yunnan Provincial Education Department Universities Serve Key Industry Science and Technology Projects (Grant No: FWCY-BSPY2024043)+1 种基金Top Innovative Talents for Graduate Students of KUST (Grant No: CA24163M116A)Analysis and Testing Fund of KUST (Grant No: 2024P20233102006)
文摘The accumulation of refractory organics in Bayer liquor(pH 14.4)critically compromises aluminum production efficiency and product quality,necessitating sustainable remediation strategies.Herein,we develop an ultrasonic-driven catalytic ozonation system with dynamically reconstructed CuO/Cu2O heterointerfaces,achieving unprecedented efficiency in extreme alkaline wastewater treatment.Atomic-scale interface engineering endows the catalyst with hydrophilicity(contact angle:6.1°)and 3.8–4.3 times higher oxygen vacancy density compared to single-phase catalysts.These properties facilitate efficient interfacial interactions with Bayer liquor and enable superior ozone activation through synergistic Cu(I)/Cu(II)redox cycling across the heterointerface.This interfacial synergy reduces ozone adsorption energy from 5.46 eV(Cu_(2)O)to 1.48 eV,driving the generation of reactive oxygen species(ROS)via low-energy pathways.Under optimized conditions,the system achieves 57.82%TOC removal within 1.5 h with 2.3-fold faster kinetics than ozone–alone processes,while improving energy efficiency by 1.82–3.22 times per kWh over conventional thermal oxidation.Remarkable stability is demonstrated through 80.21%activity retention after 6 cycles,attributed to surface energy minimization(0.61 J m^(−2)),alongside 67.91%hydroxyl radical(•OH)-mediated degradation confirmed by quenching tests.In XPS,EEMs analysis,and ECOSAR modeling further elucidate the surface reconstruction mechanism and intermediate toxicity reduction.This work establishes an atomic interface design paradigm that bridges catalytic innovation with green metallurgy applications,offering a sustainable solution for industrial wastewater remediation aligned with circular economy principles.
基金supported by the National Natural Science Foundation of China(No.42077135).
文摘Heavy metal contamination of soil is one of the major challenges to sustainable agriculture.This contamination can be transmitted through the soil food chain and poses a serious threat to human health.In this study,we found that freeze-thaw leaching(FTL)effectively complements the low removal rate of chemical leaching,and investigated the effects of different numbers of FTL on Cd contamination,soil chemical properties and microbial communities.The results showed that repeated FTL significantly reduced(P<0.05)the total Cd content in the top soil(19.02%-49.35%)and subsoil(0.41%-21.13%)and promoted the transformation of Cd to a more stable form,mainly through various removal mechanisms such as complexation,ion-exchange,and chemical precipitation.This finding was supported by reductions in several soil properties,including pH,available potassium(AK),and available phosphorus(AP).FTL treatment initially increased the bioavailability of Cd compared to chemical leaching,but bioavailability of Cd progressively decreased as the number of freeze-thaw cycles increased.Additionally,FTL reduced the richness and diversity of bacteria communities,destabilized ecological symbiotic networks,while increasing the richness and diversity of fungi in the soil.Various model analyses indicated that FTL treatment,available Cd,soil pH,AP and AK were the key drivers influencing the changes in microbial community structure.This study provides new insights and scientific bases for the effective management of heavy metal pollution in agricultural soils,the restoration of ecosystem health,and the improvement of soil sustainability.
文摘Rice cultivation,vital to global food security and the United Nations Sustainable Development Goals(SDGs),faces increasing threats from industrial pollution,which contaminates soil and water,endangers human health,and weakens agricultural resilience.Studies indicate that contaminants such as persistent organic pollutants,radioactive elements,dyes,and potentially toxic elements,particularly from mining and industrial activities,significantly degrade soil fertility,impair plant health,and introduce harmful residues into the food chain.This contamination compromises food safety and diminishes agricultural productivity,posing a serious challenge to sustainability.Addressing these impacts requires sustainable industrial practices,advanced technologies,and eco-friendly remediation techniques.Solutions like biochar applications,precision farming,and artificial intelligence(AI)-driven pollution detection provide effective measures for restoring soil health,protecting crop integrity,and ensuring the resilience of rice farming.These approaches align rice cultivation with global sustainability goals by integrating sustainable soil and water management,adaptive crop selection,and AI innovations.Protecting rice cultivation upholds farmer livelihoods and strengthens global commitments to SDGs Zero Hunger and a resilient,safe food supply,underscoring the essential balance between industrial progress and sustainable rice cultivation.
文摘Heavy metal pollution seriously threatens global rice production and food security.Arbuscular mycorrhizal fungi(AMF)can alleviate heavy metal stress in rice.To summarize existing research and propose new research directions,this review outlines the current status of heavy metal pollution from perspectives including general pollution situation,soil heavy metal pollution,water heavy metal pollution,and paddy field heavy metal pollution.This paper also synthesizes the negative impacts of heavy metal stress on rice growth in terms of morphological indicators,photosynthesis,redox balance,and nutritional metabolism.It also analyzes the mechanisms by which AMF alleviate heavy metal stress in rice,induding physiological as and biochemical regulatory mechanisms,as well as molecular and genetic regulatory mechanisms.Furthermore,this paper provides research perspectives regarding integration with genetic engineering and breeding technologies,applications under combined stress conditions,and technological integration with field application promotion,aiming to establish a theoretical foundation for further research in ecological restoration and safe utilization of heavy metal-contaminated paddy fields.
基金National Science Fund for Distinguished Young Scholars of Shandong Province(ZR2021JQ13)National Natural Science Foundation of China(42077115)+3 种基金Key R&D Program of Shandong Province,China(2022SFGC0302)Key R&D project of Shaanxi Province(2022NY-054)Fundamental Research Funds for the Central Universities(202261068)USDA Hatch program(MAS 00549).
文摘Salt-affected soils urgently need to be remediated to achieve the goals of carbon neutrality and food security.Limited reviews are available on biochar performance in remediating salt-affected soils in the context of carbon neutrality and climate change mitigation.This work summarized the two pathways to achieve carbon neutrality during remediating salt-affected soils using biochars,i.e.,biochar production from sustainable feedstock using thermal technologies,application for promoting plant productivity and mitigating greenhouse gas(GHG)emission.Converting biomass wastes into biochars can reduce GHG emission and promote carbon dioxide removal(CDR),and collection of halophyte biomass as biochar feedstocks,development of biochar poly-generation production systems with carbon neutrality or negativity could be promising strategies.Biochar can effectively improve plant growth in salt-affected soils,showing that the grand mean of plant productivity response was 29.3%,via improving physicochemical characteristics,shifting microbial communities,and enhancing plant halotolerance.Moreover,biochar can mitigate GHG emission via inducing negative priming effect,improving soil properties,changing microbial communities associated with carbon and nitrogen cycle,direct adsorption of GHG.However,biochar also may pose negative effects on plant growth because of stress of toxic compounds and free radicals,and deterioration of soil properties.The promoted GHG emission is mainly ascribed to positive priming effect,and provision of labile carbon and inorganic nitrogen fractions as microbial substrates.Finally,this review pointed out the gaps in the current studies and the future perspectives.Particularly,the development of“carbon neutral”or“carbon negative”biochar production system,balancing the relationship of biochar effectiveness and functionality with its environmental risks and costs,and designing biochar-based GHG adsorbents would be important directions for remediating salt-affected soils to achieve carbon neutrality and abate climate change.
文摘Biochar has been proposed as a soil amendment to reclaim salt-affected soils.However,the evaluation of the different biochar types in these soils is essential due to the significant variation among biochar feedstocks.In this study,biochars from sugarcane bagasse(SB),orange bagasse(OB),and corncob(CB)were applied alone and in the presence of gypsum(G)to test their potential to remediate a highly degraded saline-sodic soil in Brazil´s Northeast region.For that,we conducted a laboratory column-leaching experiment and a greenhouse study.After the column-leaching test,we analyzed the sodium adsorption ratio(SAR),the electrical conductivity of the saturation extract(ECe),the concentrations of major ions,and the exchangeable sodium percentage(ESP).Maize plants were grown in the leached soil in a greenhouse.Sugarcane-and corncob-derived biochars were more efficient than gypsum in reducing the soil salinity,bringing the indicators below threshold values,and optimizing soil reclamation time.Soil ECe,SAR,and ESP were reduced to 3.42 dS m−1,1.64(mmolc dm−3)0.5 and 4.86%,respectively,in the SB treatment;and to 3.19 dS m−1,0.88(mmolc dm−3)0.5 and 2.53%,respectively,in the CB treatment.Orange bagasse biochar did not effectively reduce the salinity indicators.All biochar treatments improved seed germination and plant growth.The SB,CB,SBG,and CBG treatments increased plant height(478–558%),shoot mass(783–983%),and root mass(386–500%),respectively.Therefore,the application of SB and CB is an effective alternative to remediate saline-sodic soils and to reduce the impact of soil salinity in the environment.
基金supported by“Pioneer”and“Leading Goose”R&D Program of Zhejiang(2022C03051).
文摘Biochar is a promising material for soil remediation.However,most studies testing the roles of biochar in soil remediation have considered the use of single types of biochar,and the role of biochar diversity,as well as its interaction with species diversity of plant communities,has rarely been considered.We hypothesize that biochar diversity can infuence the impacts of plant diversity on soil remediation.We grew grassland communities consisting of three or six plant species in cadmium(Cd)-contaminated soil mixed with one,two or four types of biochar,with no grassland community and no biochar addition as the controls.Without plant communities or with communities consisting of three species,total Cd was signifcantly lower in the soil mixed with four types of biochar than in the soil without biochar or mixed with one or two types of biochar.With communities consisting of six species,total Cd decreased with the increasing number of biochar types.Without biochar addition,soil total Cd was not infuenced by species richness,but with biochar addition,it was lower in the presence of communities with six species than in the absence of plant communities irrespective of how many types of biochar were added.Also,soil total Cd was lower in the presence of communities with six than with three plant species when two or four types of biochar were added.Our study indicates that increasing biochar diversity can promote the impact of plant diversity on remediating soil contaminated by heavy metals such as Cd.
基金financially supported by the National Natural Science Foundation of China(Nos.51602018 and 51902018)the Natural Science Foundation of Beijing Municipality(No.2154052)+3 种基金the China Postdoctoral Science Foundation(No.2014M560044)the Fundamental Research Funds for the Central Universities(No.FRF-MP-20-22)USTB Research Center for International People-to-people Exchange in Science,Technology and Civilization(No.2022KFYB007)Education and Teaching Reform Foundation at University of Science and Technology Beijing(Nos.2023JGC027,KC2022QYW06,and KC2022TS09)。
文摘S and Co co-doped carbon catalysts were prepared via pyrolysis of MOF-71 and thiourea mixtures at 800℃at a mass ratio of MOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PMS)for methylene blue(MB)degradation.The effects of two different mixing routes were identified on the MB degradation performance.Particularly,the catalyst obtained by the alcohol solvent evaporation(MOF-AEP)mixing route could degrade 95.60%MB(50 mg/L)within 4 min(degradation rate:K=0.78 min^(-1)),which was faster than that derived from the direct grinding method(MOF-DGP,80.97%,K=0.39 min^(-1)).X-ray photoelectron spectroscopy revealed that the Co-S content of MOF-AEP(43.39at%)was less than that of MOF-DGP(54.73at%),and the proportion of C-S-C in MOF-AEP(13.56at%)was higher than that of MOF-DGP(10.67at%).Density functional theory calculations revealed that the adsorption energy of Co for PMS was -2.94 eV when sulfur was doped as C-S-C on the carbon skeleton,which was higher than that when sulfur was doped next to cobalt in the form of Co-S bond(-2.86 eV).Thus,the C-S-C sites might provide more contributions to activate PMS compared with Co-S.Furthermore,the degradation parameters,including pH and MOF-AEP dosage,were investigated.Finally,radical quenching experiments and electron paramagnetic resonance(EPR)measurements revealed that ^(1)O_(2)might be the primary catalytic species,whereas·O~(2-)might be the secondary one in degrading MB.
基金supported by the National Natural Science Foundation of China(Nos.52100184,and U22A20617).
文摘Controlling heavy metal pollution in agricultural soil has been a significant challenge.These heavy metals seriously threaten the surrounding ecological environment and human health.The effective assessment and remediation of heavy metals in agricultural soils are crucial.These two aspects support each other,forming a close and complete decisionmaking chain.Therefore,this review systematically summarizes the distribution characteristics of soil heavy metal pollution,the correlation between soil and crop heavy metal contents,the presence pattern and migration and transformation mode of heavy metals in the soil-crop system.The advantages and disadvantages of the risk evaluation tools and models of heavy metal pollution in farmland are further outlined,which provides important guidance for an in-depth understanding of the characteristics of heavymetal pollution in farmland soils and the assessment of the environmental risk.Soil remediation strategies involve multiple physical,chemical,biological and even combined technologies,and this paper compares the potential and effect of the above current remediation technologies in heavy metal polluted farmland soils.Finally,the main problems and possible research directions of future heavy metal risk assessment and remediation technologies in agricultural soils are prospected.This review provides new ideas for effective assessment and selection of remediation technologies based on the characterization of soil heavy metals.
基金financially supported by the National Natural Science Foundation of China(Nos.42177239 and 41991330)the“14th Five Year Plan”of Independent Deployment Project of Nanjing Institute of Soil Research,Chinese Academy of Sciences(No.ISSASIP2213)。
文摘New pollutants have become a significant concern in China's efforts toward ecological and environmental protection.Trichloromethane(TCM,CHCl_3),one of these new pollutants,is primarily released into soil and groundwater through various industrial activities.Over the past four decades,researchers have consistently focused on the remediation of TCM-contaminated soil and groundwater using microorganisms and iron-based materials,which hold significant potential for practical application.Understanding the remediation process and the factors influencing TCM degradation through these two methods is crucial for advancing both theoretical research and practical implementation.This review focuses on the degradation mechanisms of TCM in soil and groundwater by microorganisms and iron-based materials.It summarizes the active microorganisms and modified iron-based materials with high TCM degradation capabilities,discusses enhancement measures for both methods in the remediation process,and finally,outlines the challenges faced by these methods.The goal is to provide theoretical references for efficient remediation of TCM-contaminated soil and groundwater.
基金supported by the Fundamental Research Funds for Central PublicWelfare Scientific Research Institutes of China(No.2021-JY-37)the Yellow River Basin Ecological Protection and High-quality Development Joint Study(Phase I)(No.2022-YRUC-01-0202).
文摘Pollution accident of nonferrous metallurgy industry often lead to serious heavy metal pollution of the surrounding soil.Phytoremediation of contaminated soil is an environmental and sustainable technology,and soil native microorganisms in the process of phytoremediation also participate in the remediation of heavy metals.However,the effects of high concentrations of multiple heavy metals(HCMHMs)on plants and native soil microorganisms remain uncertain.Thus,further clarification of themechanism of phytoremediation of HCMHMs soil by plants and native soil microorganisms is required.Using the plant Sedum alfredii(S.alfredii)to restore HCMHM-contaminated soil,we further explored the mechanism of S.alfredii and native soil microorganisms in the remediation of HCMHM soils.The results showed that(i)S.alfredii can promote heavy metals from non-rhizosphere soil to rhizosphere soil,which is conducive to the effect of plants on heavy metals.In addition,it can also enrich the absorbed heavy metals in its roots and leaves;(ii)native soil bacteria can increase the abundance of signal molecule-synthesizing enzymes,such as trpE,trpG,bjaI,rpfF,ACSL,and yidC,and promote the expression of the pathway that converts serine to cysteine,then synthesize substances to chelate heavy metals.In addition,we speculated that genes such as K19703,K07891,K09711,K19703,K07891,and K09711 in native bacteria may be involved in the stabilization or absorption of heavy metals.The results provide scientific basis for S.alfredii to remediate heavy metals contaminated soils,and confirm the potential of phytoremediation of HCMHM contaminated soil.
基金supported by the National Natural Science Foundation of China(No.32171615)the National Key R&D Program of China(2019YFC1804102)。
文摘Agricultural soil is related to food security and human health,antibiotics and heavy metals(HMs),as two typical pollutants,possess a high coexistence rate in the environmental medium,which is extremely prone to inducing antibiotic-HMs combined pollution.Recently,frequent human activities have led to more prominent antibiotics-HMs combined contamination in agricultural soils,especially the production and spread of antibiotic resistance genes(ARGs),heavy metal resistance genes(MRGs),antibiotic resistant bacteria(ARB),and antibiotics-HMs complexes(AMCs),which seriously threaten soil ecology and human health.This review describes the main sources(Intrinsic and manmade sources),composite mechanisms(co-selective resistance,oxidative stress,and Joint toxicity mechanism),environmental fate and the potential risks(soil ecological and human health risks)of antibiotics and HMs in agricultural soils.Finally,the current effective source blocking,transmission control,and attenuation strategies are classified for discussion,such as the application of additives and barrier materials,as well as plant and animal remediation and bioremediation,etc.,pointing out that future research should focus on the whole chain process of“source-processterminal”,intending to provide a theoretical basis and decision-making reference for future research.
基金supported by the National Natural Science Foundation of China(Grant Nos.:32270690 and 32070671).
文摘High-altitude pulmonary hypertension(HAPH)occurs when blood pressure in the pulmonary arteries rises due to exposure to high altitudes above 2,500 m.At these elevations,reduced atmospheric pressure leads to lower oxygen levels,triggering a series of physiological responses,including pulmonary artery constriction,which elevates blood pressure.This review explored the complex pathophysiological mechanisms of HAPH and reviewed current pharmaceutical interventions for its management.Meanwhile,this review particularly emphasized on the emerging research concerning Chinese medicinal plants as potential treatments for HAPH.Traditional Chinese medicines are rich in diverse natural ingredients that show significant promise in alleviating HAPH symptoms.We reviewed both in vitro and in vivo studies to assess the efficacy,safety,and mechanisms of these natural medicines,along with their potential adverse effects.Additionally,this review highlighted new alternative natural remedies,underscoring the need for ongoing research to expand available treatment options for HAPH.
