Microplastic contamination has emerged as a threat in transplantation,with evidence of its presence in human tissues and potential to compromise grafts.Transplant recipients,vulnerable due to immunosuppression and sur...Microplastic contamination has emerged as a threat in transplantation,with evidence of its presence in human tissues and potential to compromise grafts.Transplant recipients,vulnerable due to immunosuppression and surgical exposure,face risk from microplastics via airborne particles,surgical materials,and organ preservation systems.These particles trigger inflammation,oxidative stress,and immune dysregulation—pathways critical in rejection.Microplastics support biofilm formation,potentially facilitating antimicrobial resistance in clinical settings.Despite this risk,transplant-specific research is lacking.We urge action through environmental controls,material substitutions,and procedural modifications,alongside research targeting exposure pathways,biological impact,and mitigation strategies.Transplantation has historically led medical innovation and must do so in confronting this environmental challenge.Leadership from global transplant societies is essential to protect recipients and ensure safe procedures.展开更多
To better understand the migration behavior of plastic fragments in the environment,development of rapid non-destructive methods for in-situ identification and characterization of plastic fragments is necessary.Howeve...To better understand the migration behavior of plastic fragments in the environment,development of rapid non-destructive methods for in-situ identification and characterization of plastic fragments is necessary.However,most of the studies had focused only on colored plastic fragments,ignoring colorless plastic fragments and the effects of different environmental media(backgrounds),thus underestimating their abundance.To address this issue,the present study used near-infrared spectroscopy to compare the identification of colored and colorless plastic fragments based on partial least squares-discriminant analysis(PLS-DA),extreme gradient boost,support vector machine and random forest classifier.The effects of polymer color,type,thickness,and background on the plastic fragments classification were evaluated.PLS-DA presented the best and most stable outcome,with higher robustness and lower misclassification rate.All models frequently misinterpreted colorless plastic fragments and its background when the fragment thickness was less than 0.1mm.A two-stage modeling method,which first distinguishes the plastic types and then identifies colorless plastic fragments that had been misclassified as background,was proposed.The method presented an accuracy higher than 99%in different backgrounds.In summary,this study developed a novel method for rapid and synchronous identification of colored and colorless plastic fragments under complex environmental backgrounds.展开更多
During thewater treatment process,chlorination and ultraviolet(UV)sterilization can modify microplastics(MPs)and alter their physicochemical properties,causing various changes between MPs and other pollutants.In this ...During thewater treatment process,chlorination and ultraviolet(UV)sterilization can modify microplastics(MPs)and alter their physicochemical properties,causing various changes between MPs and other pollutants.In this study,the impact of chlorination and UV modification on the physicochemical properties of polystyrene(PS)and polyvinyl chloride(PVC)were investigated,and the adsorption behavior of pefloxacin(PEF)before and after modificationwas examined.The effect of pH,ionic strength,dissolved organicmatter,heavymetal ions and other water environmental conditions on adsorption behavior was revealed.The results showed that PS had a higher adsorption capacity of PEF than PVC,and the modification increased the presence of O-containing functional groups in the MPs,thereby enhancing the adsorption capacity of both materials.Chlorination had a more significant impact on the physicochemical properties of MPs compared to UV irradiation within the same time period,leading to better adsorption performance of chlorination.The optimal pH for adsorption was found to be 6,and NaCl,sodium alginate and Cu2+would inhibit adsorption to varying degrees,among which the inhibition caused by pH was the strongest.Chlorination and UV modification would weaken the inhibitory effect of environmental factors on the adsorption of PEF by MPs.The main mechanisms of adsorption involved electrostatic interaction and hydrogen bonding.The study clarified the effects of modification on the physicochemical properties of MPs,providing reference for subsequent biotoxicity analysis and environmental protection studies.展开更多
Microplastics(MPs),as a new category of environmental pollutant,have been the hotspot of eco-friendly issues nowadays.Studies based on the aging process,the migration pattern of MPs in runoff rainwater,and the use of ...Microplastics(MPs),as a new category of environmental pollutant,have been the hotspot of eco-friendly issues nowadays.Studies based on the aging process,the migration pattern of MPs in runoff rainwater,and the use of bioretention cells to remove MPs from runoff rainwater are beginning to attract widespread attention.This review analyses the migration patterns of MPs in rainwater runoff through their sources,structure and characteristics.The mechanism of removing MPs from runoff stormwater,the purification efficiency of different fillers and their influencing factors,and the accumulation,fate,and aging of MPs in bioretention cells are described.Furthermore,the hazards of MP accumulation on the performance of bioretention cells are summarised.Future directions for removing MPs in bioretention cells are proposed:(1)research on MPs smaller than 100μm;(2)influence of MPs aging process on bioretention cells;(3)exploration of more effective fillers to enhance their removal efficiency;(4)research on synergistic removal mechanism of MPs and other pollution.展开更多
Global marine ecosystems are signiicantly endangered by microplastic pollution,leading to comprehensive investigations into its distribution and impacts on the health of ecosystem.This research employs the Alseamar Au...Global marine ecosystems are signiicantly endangered by microplastic pollution,leading to comprehensive investigations into its distribution and impacts on the health of ecosystem.This research employs the Alseamar Autonomous Underwater Vehicle(AUV)known as Glider to investigate microplastic concentrations within the Al Hoceima Marine Protected Area(MPA).Our objective is to identify spatial patterns that reveal pollution hotspots and furnish data for targeted conservation efforts and pollution prevention.We aim to identify regions with elevated microplastic concentrations by meticulously analyzing microplastic level graphs,with a speciic focus on temporal variations.The results reveal notable patterns,such as increased densities aroundishing harbors and near urban centers,potentially linked to anthropogenic activities.Additionally,we observe variations in pollution levels throughout different glider operation cycles,underscoring the importance of understanding the spatio‑temporal dynamics of microplastic distribution.Al Hoceima Marine protected areas exhibiting lower microplastic concentrations illustrate the eficacy of such zones in alleviating pollution impacts,thereby underscoring the signiicance of conservation efforts in safeguarding marine biodiversity and ecosystem resilience.Ultimately,our research enhances our comprehension of the pressures exerted by humans on marine environments and underscores the necessity of proactive conservation measures to shield marine ecosystems from the threats posed by microplastic pollution.展开更多
The issue of plastic pollutants has become a growing concern.Both microplastics(MPs)(particle size<5 mm)and nanoplastics(NPs)(particle size<1μm)can cause DNA damage,cytotoxicity,and oxidative stress in various ...The issue of plastic pollutants has become a growing concern.Both microplastics(MPs)(particle size<5 mm)and nanoplastics(NPs)(particle size<1μm)can cause DNA damage,cytotoxicity,and oxidative stress in various organisms.The primary known impacts of microplastic/nanoplastic are observed in the liver and respiratory system,leading to hepatotoxicity and chronic obstructive pulmonary disease.Although research on the effects of MPs and NPs on diabetes is still in its early stages,there are potential concerns.This editorial highlights the risk to diabetics from co-exposure to contaminants and MPs/NPs,supported by evidence from animal studies and the various chemical compositions of MPs/NPs.展开更多
As a new type of pollutant,the harm caused by microplastics(MPs)to organisms has been the research focus.Recently,the proportion of MPs ingested through the digestive tract has gradually increased with the popularity ...As a new type of pollutant,the harm caused by microplastics(MPs)to organisms has been the research focus.Recently,the proportion of MPs ingested through the digestive tract has gradually increased with the popularity of fast-food products,such as takeout.The damage to the digestive system has attracted increasing attention.We reviewed the literature regarding toxicity of MPs and observed that they have different effects on multiple organs of the digestive system.The mechanism may be related to the toxic effects of MPs themselves,interactions with various substances in the biological body,and participation in various signaling pathways to induce adverse reactions as a carrier of toxins to increase the time and amount of body absorption.Based on the toxicity mechanism of MPs,we propose specific suggestions to provide a theoretical reference for the government and relevant departments.展开更多
This paper summarizes the mechanisms and environmental effects of interactions between microplastics and surfactants: surfactants adsorb onto microplastics surfaces through hydrophobic interactions and electrostatic f...This paper summarizes the mechanisms and environmental effects of interactions between microplastics and surfactants: surfactants adsorb onto microplastics surfaces through hydrophobic interactions and electrostatic forces, changing their surface properties and transport behavior. In addition, microplastics act as carriers influencing surfactant distribution. Environmental factors (pH, ionic strength, etc. ) significantly regulate this process. Current research still has limitations in areas such as desorption kinetics and combined pollution effects, necessitating in-depth studies under environmentally relevant conditions to provide a basis for risk assessment.展开更多
As the main component of electronic products,plastics contain complex and diverse metal additives.Recycling process is not conducive to stable existence of metal additives in electronic plastics.Once the e-waste plast...As the main component of electronic products,plastics contain complex and diverse metal additives.Recycling process is not conducive to stable existence of metal additives in electronic plastics.Once the e-waste plastics enter the environment,they will continue to release harmful metals into environment after aging,causing serious hazards.This study delved into the analysis and comparison of metal content of e-waste plastics,elucidating aging process and metal leaching behavior over a 112-day natural light exposure period.The findings underscored that metal content in recycled plastics surpassed that in their new counterparts.Specifically,Ti content in new plastics remained below 100 mg/kg,while recycled plastics exhibited Ti content surpassing 100 mg/kg threshold.Throughout prolonged natural light exposure,metals such as Zn,Ba and Sb demonstrated a heightened likelihood of release from electronic plastics in comparison to other metals.The aging process during light exposure led to fragmentation of electronic plastics,accompanied by a reduction in particle size.Notably,the particle size reduction was more pronounced in poly acrylonitrile butadiene styrene(ABS)and recycled ABS,experiencing reductions of 40µm and 85µm,respectively.This phenomenon was attributed to the presence of polybutadiene structural units,which proved more susceptible to aging.Along with the breaking of plastics,the ABS plastics released metal species such as Pb,Cd,Ni,Al that had not been detected in other plastics solutions.The collective evidence from this study suggested that ABS and recycled ABS electronic plastics might pose a heightened potential environmental risk compared to other electronic plastics.展开更多
Microplastics loaded with phenanthrene and derivatives are widely detected in aquatic environments,and the coating of natural minerals or organic macromolecules may change the environmental behavior of microplastics.I...Microplastics loaded with phenanthrene and derivatives are widely detected in aquatic environments,and the coating of natural minerals or organic macromolecules may change the environmental behavior of microplastics.In this study,three kinds of composites with different coverage were prepared by coating goethite on the surface of polyvinyl chloride microplastics to investigate the adsorption and desorption behavior of phenanthrene(PHE)and 1-hydroxyphenanthrene(1-OHPHE),and the effect of mucin on desorption was inves-tigated.The results showed that goethite promoted the adsorption of PHE and 1-OHPHE by increasing the specific surface area of the composites.With the increase of the cover de-gree,the adsorption of PHE decreased because of the decrease in hydrophobicity;while the adsorption of 1-OHPHE initially increased and then decreased with the contributions of hydrophobic interaction and hydrogen bond.The adsorption of 1-OHPHE could be influenced by the pH and ionic strength primarily through electrostatic interactions and Ca2+bridg-ing.The goethite significantly increased the desorption hysteresis for two chemicals due to the complicated pore structures and increased adsorption affinity.Mucin promoted the desorption of PHE through competitive adsorption,and inhibit the desorption of 1-OHPHE through hydrophobic interaction,hydrogen bonding and Ca2+bridging.This study elucidated the effects of natural minerals on the adsorption and desorption behavior of organic pollutants on microplastics,briefly discussed the effects of organic macromolecules on the desorption behavior of pollutants with different properties,and emphasized the different environmental behaviors of pollutants.展开更多
Microplastics(MPs) are an emerging environmental pollutant and have penetrated the most remote and primitive areas. MPs degradation has received widespread attention. Manganese(Mn) is a highly reactive metal element i...Microplastics(MPs) are an emerging environmental pollutant and have penetrated the most remote and primitive areas. MPs degradation has received widespread attention. Manganese(Mn) is a highly reactive metal element in the environment, yet its contribution to MPs degradation remains unclear. Herein,we simulated the aging of polyethylene MPs with Mn(Ⅱ) under aqueous conditions at pH 5 and 8 for720 days. Mn greatly promoted the MPs degradation, and the average particle sizes of polyethylene MPs were reduced from 9.2 μm to 5.9 μm after aging at pH 5 under light irradiation for 720 days. Plenty of oxygen-containing groups were generated on the MPs surfaces, and the carbonyl index remarkably increased, reaching four times that of the control without adding Mn. Mechanistically, the adsorbed Mn(Ⅱ)on the MPs surfaces were primarily oxidized to high-valence Mn(Ⅲ/Ⅳ) profited from the photoproduced radicals, followed by the MPs oxidation via Mn(Ⅲ/Ⅳ), which were reduced to regenerate Mn(Ⅱ), initiating a new redox cycling. During the degradation, dissolved organic matter was continuously released, mainly including bisphenol A and phthalic acid esters. Mn acts as a catalyst to accelerate the MPs degradation by redox cycling. Our results provide a new insight into the mechanisms of abiotic degradation of MPs in aqueous environments.展开更多
The contamination and accumulation of microplastics(MPs)in mangrove ecosystems have become an increasing concern due to their potential ecological risks.This study investigated and analyzed the abundance of MPs in sed...The contamination and accumulation of microplastics(MPs)in mangrove ecosystems have become an increasing concern due to their potential ecological risks.This study investigated and analyzed the abundance of MPs in sediments,water,and benthos of mangrove areas(MA)and adjacent non-vegetated areas(NA)in Qinglan Bay.Results showed that the abundance of MPs in MA was significantly higher than in adjacent NA[sediment:(4.39±2.20)items/50 g dry weight(dw)vs.(4.10±2.71)items/50 g dw;water:(11.79±7.61)items/L vs.(10.61±5.93)items/L;benthos:(4.94±5.27)items/individual vs.(3.5±0.71)items/individual].The primary components identified in sediments and benthos were rayon and cellulose,while polyethylene(PE)and polypropylene(PP)dominated in water.Smaller MPs(<1000μm)accounted for 44%,43%,and 61%of the MPs in sediments,water,and benthos,respectively,indicating that smaller MPs are more likely to be ingested or captured by benthic organisms.Additionally,MPsenrichment was calculated in benthos[enrichment index(EI)=1.41],water(EI=1.11),and sediments(EI=1.09),confirming that the unique ecological environment of the MA leads to different distribution and accumulation characteristics of MPs compared to the NA.The ecological risk assessment revealed low MPs pollution levels in sediments and water,but higher risks were observed for polychaetes and bivalves.展开更多
Microplastics(MPs),defined as plastic particles with diameters less than 5 mm,have become significant global environmental contaminants.MPs accumulate in human tissues and organs,raising significant concerns about the...Microplastics(MPs),defined as plastic particles with diameters less than 5 mm,have become significant global environmental contaminants.MPs accumulate in human tissues and organs,raising significant concerns about their potential biological toxicity.Evidence indicates that MPs and associated toxins disrupt stem cell self-renewal,proliferation,and differentiation processes essential for tissue regeneration and systemic homeostasis,yet research on MP-induced stem cell damage remains limited.To identify relevant and recent studies,we searched the PubMed database using title and abstract fields.This review synthesizes current evidence across organ systems,including nervous,hematopoietic,skeletal,and urinary systems,to systematically categorize phenotypic disruptions and un-derlying mechanisms in stem cells.We further evaluate the utility of stem-cell-derived organoids in modeling organ-specific MP toxicity.By consolidating fragmented findings,this work provides a critical framework for assessing MP risks to tissue regeneration and informs strategies for regenerative medicine and public health protection.展开更多
Microplastics(MPs)are of particular concern due to their ubiquitous occurrence and propensity to interact and concentrate various waterborne contaminants from aqueous surroundings.Studies on the interaction and joint ...Microplastics(MPs)are of particular concern due to their ubiquitous occurrence and propensity to interact and concentrate various waterborne contaminants from aqueous surroundings.Studies on the interaction and joint toxicity of MPs on engineered nanoparticles(ENPs)are exhaustive,but limited research on the effect of MPs on the properties of ENPs in multisolute systems.Here,the effect of MPs on adsorption ability of ENPs to antibiotics was investigated for the first time.The results demonstrated that MPs enhanced the adsorption affinity of ENPs to antibiotics and MPs before and after aging showed different effects on ENPs.Aged polyamide prevented aggregation of ZnONPs by introducing negative charges,whereas virgin polyamide affected ZnONPs with the help of electrostatic attraction.FT-IR and XPS analyses were used to probe the physicochemical interactions between ENPs and MPs.The results showed no chemical interaction and electrostatic interactionwas the dominant force between them.Furthermore,the adsorption rate of antibiotics positively correlated with pH and humic acid but exhibited a negative correlation with ionic strength.Our study highlights that ENPs are highly capable of accumulating and transporting antibiotics in the presence of MPs,which could result in a widespread distribution of antibiotics and an expansion of their environmental risks and toxic effects on biota.It also improves our understanding of the mutual interaction of various co-existing contaminants in aqueous environments.展开更多
Plastic pollution and microplastics in sediments are a growing concern for marine ecosystems worldwide.We examined the vertical distribution and properties of microplastics in beach sediments of Xuwen Coral Reef Natio...Plastic pollution and microplastics in sediments are a growing concern for marine ecosystems worldwide.We examined the vertical distribution and properties of microplastics in beach sediments of Xuwen Coral Reef National Nature Reserve,in Leizhou Peninsula,Zhanjiang,China.Sediment samples were taken in seven locations at 5-cm intervals from the surface to a depth of 30 cm.The vertical distribution of microplastic particles ranged from 0 to 1340 particles per kg on average of 119.05particles per kg.The most prevalent material was fibers(76%),followed by film(12%),fragments(11.2%),and foam(0.8%).The microplastics in size of 1-2 mm constituted the largest percentage(40%)of the total,followed by those in size of<1 mm(26.4%),2-3 mm(21.2%),3-4 mm(9.6%),and 4-5 mm(2.81%).Site S1 observed maximum sizes between 1 and 2 mm,S2 reported higher availability of microplastics with sizes ranging from 0.3 to 1 mm.Six different types of polymers were identified in the investigation,and mostly were polyethylene(PE)and polypropylene(PP).In general,the observation of microplastics in deeper sediments indicates that they have the ability to last for prolonged periods in the marine environment,which may present long-term hazards to benthic creatures.In conclusion,the discovery of microplastics in deep layers of coastal sediments highlights the necessity of minimizing plastic waste and enhancing management strategies to safeguard marine environments.展开更多
Co-exposure of pharmaceuticals and microplastics(MPs)significantly exacerbates the aquatic environmental pollution issue.While MPs are identified as carriers of pollutants,research on the adsorption behaviors of biode...Co-exposure of pharmaceuticals and microplastics(MPs)significantly exacerbates the aquatic environmental pollution issue.While MPs are identified as carriers of pollutants,research on the adsorption behaviors of biodegradable and conventional MPs to pharmaceuticals limited.The study investigated the adsorption behavior of conventional MPs(polystyrene and polyethylene terephthalate),biodegradable MPs polylactic acid(PLA)and polybutylene succinate(PBS)for sulfamethoxazole(SMX).Meanwhile,changes in physicalchemical properties,including morphology,crystallinity,hydrophobicity and structures of MPs after aging(e.g.,ultraviolet treatment)were investigated.Results exhibited that the oxygen-containing functional groups of MPs surface increased after ultraviolet treatment and enhanced the adsorption capacity for SMX,except for PLA.PLA exhibits the highest adsorption capacity,primarily due to its higher hydrophobicity and larger pore size.In contrast,PBS shows the lowest adsorption affinity for SMX because of its hydrophilicity and small pore size.The adsorption capacity of degradable MPs after aging is greater than that of non-degradable MPs.Electrostatic interaction and hydrophobic interaction are the main mechanisms of adsorption of virgin MPs,while hydrogen bond interaction and electrostatic interaction are the primary adsorption mechanisms for aged MPs.These results contribute to understanding the co-transport and migration of SMX and MPs in the environment,and furnish the necessary data for their ecological risk assessment.展开更多
This communication looks at the photo-oxidation of polythene and polypropylene plastic bottle tops that are placed on soil in a hot arid environment. The degree of oxidation of the plastic is monitored by FT-IR spectr...This communication looks at the photo-oxidation of polythene and polypropylene plastic bottle tops that are placed on soil in a hot arid environment. The degree of oxidation of the plastic is monitored by FT-IR spectroscopy. It is noted that while different bottle top types photo-oxidize at different rates, all show an appreciable level of oxidation after half a year of exposure to the environment. The oxidation leads to brittleness of the plastic, which leads to fissure formation in bottle tops of little thickness. This leads to fragmentation of the material upon impact, making plastic bottle tops an appreciable source of microplastics.展开更多
To explore the relationship of microplastic pollution in different media in marine environment,microplastics in the surface seawater and sediments of Laizhou Bay,Bohai Sea,North China,were studied.Seawater samples wer...To explore the relationship of microplastic pollution in different media in marine environment,microplastics in the surface seawater and sediments of Laizhou Bay,Bohai Sea,North China,were studied.Seawater samples were collected using a pre-concentrator equipped with a 20-μm mesh size sieve,and sediment samples were collected by a box sampler.The shape,color,size,and type of microplastics were obtained by a stereomicroscope and a Fourier transform infrared spectrometer(ATR-μ-FT-IR).Results show that the abundance of microplastics in the surface seawater of Laizhou Bay was 858.3±573.2 items/m~3,and that of microplastics in sediments was 151.0±77.4 items/kg dry weight(d.w.)The microplastics in seawater and sediments were mainly fibrous.Meanwhile,the microplastics in seawater were mainly transparent,and those in sediments were transparent and blue.The highest proportion of microplastics in seawater was rayon(77.48%),followed by polyethylene terephthalate(PET,13.17%).The highest proportion of microplastics in sediments was rayon(73.66%),followed by PET(8.90%).The size of microplastics in 1000-2000μm accounted for the largest proportion of 28.54%in seawater,while that in 500-1000μm took 27.93%in sediment.Microplastics in seawater and sediment showed medium-level pollution.In seawater,microplastic abundance was higher in offshore and nearshore areas of Weifang.In sediment,microplastic abundance was higher in offshore and nearshore areas of Dongying.The results of the principal component analysis(PCA)indicated that microplastics in sediment exhibited greater stability compared to those in seawater.The microplastics in seawater and sediment show a positive correlation in terms of shape and plastic type,while exhibiting a negative correlation in terms of color.Overall,microplastics in sediments were smaller in size,and those in seawater and sediments had consistent size distribution characteristics in space.展开更多
Microplastics(MPs)pollution has become a worldwide environmental problem.The study about the effects of microplastics on fish,especially on the fish immune system is limited.In the present study,the transcriptome of s...Microplastics(MPs)pollution has become a worldwide environmental problem.The study about the effects of microplastics on fish,especially on the fish immune system is limited.In the present study,the transcriptome of soiny mullet(Liza haematocheila)larvae at 7 d and 14 d post 0.5μm MPs exposure were analyzed by DNBSEQ platform.A total number of 96585 unigenes were obtained with average length of 1925 bp.Approximately 72.48%(70004),76.80%(74176),and 62.94%(60787)unigenes were matched with the annotated sequences for non-redundant(NR),NCBI nucleotide(NT)and Swissprot database,respectively.Compared with control group,1336 differently expressed genes(DEGs)were identified at 7 d post MPs exposure.As the MPs exposure time extended to 14 d,the number of DEGs in the MPs exposure group reached to 3561.Further,KEGG enrichment analysis revealed that several immune-related pathways,such as interleukin(IL)-17 signaling pathway,tumor necrosis factor(TNF)signaling pathway,were affected by MPs exposure.In addition,apoptosis signaling pathway was also enriched under MPs exposure.These results demonstrated that MPs can alter the expressions of immune-related genes,providing basis for understanding the immune toxicity of MPs on fish and other vertebrates.展开更多
Due to their resistance to degradation,wide distribution,easy diffusion and potential uptake by organisms,microplastics(MPs)pollution has become a major environmental concern.In this study,PEG-modified Fe_(3)O_(4)magn...Due to their resistance to degradation,wide distribution,easy diffusion and potential uptake by organisms,microplastics(MPs)pollution has become a major environmental concern.In this study,PEG-modified Fe_(3)O_(4)magnetic nanoparticles demonstrated superior adsorption efficiency against polyethylene(PE)microspheres compared to other adsorbents(bare Fe_(3)O_(4),PEI/Fe_(3)O_(4)and CA/Fe_(3)O_(4)).Themaximumadsorption capacity of PEwas found to be 2203 mg/g by adsorption isotherm analysis.PEG/Fe_(3)O_(4)maintained a high adsorption capacity even at low temperature(5℃,2163 mg/g),while neutral pH was favorable for MP adsorption.The presence of anions(Cl^(-),SO_(4)^(2-),HCO_(3)^(-),NO_(3)^(-))and of humic acids inhibited the adsorption of MPs.It is proposed that the adsorption process was mainly driven by intermolecular hydrogen bonding.Overall,the study demonstrated that PEG/Fe_(3)O_(4)can potentially be used as an efficient control against MPs,thus improving the quality of the aquatic environment and of our water resources.展开更多
文摘Microplastic contamination has emerged as a threat in transplantation,with evidence of its presence in human tissues and potential to compromise grafts.Transplant recipients,vulnerable due to immunosuppression and surgical exposure,face risk from microplastics via airborne particles,surgical materials,and organ preservation systems.These particles trigger inflammation,oxidative stress,and immune dysregulation—pathways critical in rejection.Microplastics support biofilm formation,potentially facilitating antimicrobial resistance in clinical settings.Despite this risk,transplant-specific research is lacking.We urge action through environmental controls,material substitutions,and procedural modifications,alongside research targeting exposure pathways,biological impact,and mitigation strategies.Transplantation has historically led medical innovation and must do so in confronting this environmental challenge.Leadership from global transplant societies is essential to protect recipients and ensure safe procedures.
基金supported by the National Natural Science Foundation of China(No.22276139)the Shanghai’s Municipal State-owned Assets Supervision and Administration Commission(No.2022028).
文摘To better understand the migration behavior of plastic fragments in the environment,development of rapid non-destructive methods for in-situ identification and characterization of plastic fragments is necessary.However,most of the studies had focused only on colored plastic fragments,ignoring colorless plastic fragments and the effects of different environmental media(backgrounds),thus underestimating their abundance.To address this issue,the present study used near-infrared spectroscopy to compare the identification of colored and colorless plastic fragments based on partial least squares-discriminant analysis(PLS-DA),extreme gradient boost,support vector machine and random forest classifier.The effects of polymer color,type,thickness,and background on the plastic fragments classification were evaluated.PLS-DA presented the best and most stable outcome,with higher robustness and lower misclassification rate.All models frequently misinterpreted colorless plastic fragments and its background when the fragment thickness was less than 0.1mm.A two-stage modeling method,which first distinguishes the plastic types and then identifies colorless plastic fragments that had been misclassified as background,was proposed.The method presented an accuracy higher than 99%in different backgrounds.In summary,this study developed a novel method for rapid and synchronous identification of colored and colorless plastic fragments under complex environmental backgrounds.
基金supported by the Shanxi Scholarship Council of China(No.2023-054)the Applied Basic Research Project of Shanxi Province,China(No.20210302123121)the National Natural Science Foundation of China(No.52170045).
文摘During thewater treatment process,chlorination and ultraviolet(UV)sterilization can modify microplastics(MPs)and alter their physicochemical properties,causing various changes between MPs and other pollutants.In this study,the impact of chlorination and UV modification on the physicochemical properties of polystyrene(PS)and polyvinyl chloride(PVC)were investigated,and the adsorption behavior of pefloxacin(PEF)before and after modificationwas examined.The effect of pH,ionic strength,dissolved organicmatter,heavymetal ions and other water environmental conditions on adsorption behavior was revealed.The results showed that PS had a higher adsorption capacity of PEF than PVC,and the modification increased the presence of O-containing functional groups in the MPs,thereby enhancing the adsorption capacity of both materials.Chlorination had a more significant impact on the physicochemical properties of MPs compared to UV irradiation within the same time period,leading to better adsorption performance of chlorination.The optimal pH for adsorption was found to be 6,and NaCl,sodium alginate and Cu2+would inhibit adsorption to varying degrees,among which the inhibition caused by pH was the strongest.Chlorination and UV modification would weaken the inhibitory effect of environmental factors on the adsorption of PEF by MPs.The main mechanisms of adsorption involved electrostatic interaction and hydrogen bonding.The study clarified the effects of modification on the physicochemical properties of MPs,providing reference for subsequent biotoxicity analysis and environmental protection studies.
基金supported by the National Natural Science Foundation of China(No.52070152).
文摘Microplastics(MPs),as a new category of environmental pollutant,have been the hotspot of eco-friendly issues nowadays.Studies based on the aging process,the migration pattern of MPs in runoff rainwater,and the use of bioretention cells to remove MPs from runoff rainwater are beginning to attract widespread attention.This review analyses the migration patterns of MPs in rainwater runoff through their sources,structure and characteristics.The mechanism of removing MPs from runoff stormwater,the purification efficiency of different fillers and their influencing factors,and the accumulation,fate,and aging of MPs in bioretention cells are described.Furthermore,the hazards of MP accumulation on the performance of bioretention cells are summarised.Future directions for removing MPs in bioretention cells are proposed:(1)research on MPs smaller than 100μm;(2)influence of MPs aging process on bioretention cells;(3)exploration of more effective fillers to enhance their removal efficiency;(4)research on synergistic removal mechanism of MPs and other pollution.
文摘Global marine ecosystems are signiicantly endangered by microplastic pollution,leading to comprehensive investigations into its distribution and impacts on the health of ecosystem.This research employs the Alseamar Autonomous Underwater Vehicle(AUV)known as Glider to investigate microplastic concentrations within the Al Hoceima Marine Protected Area(MPA).Our objective is to identify spatial patterns that reveal pollution hotspots and furnish data for targeted conservation efforts and pollution prevention.We aim to identify regions with elevated microplastic concentrations by meticulously analyzing microplastic level graphs,with a speciic focus on temporal variations.The results reveal notable patterns,such as increased densities aroundishing harbors and near urban centers,potentially linked to anthropogenic activities.Additionally,we observe variations in pollution levels throughout different glider operation cycles,underscoring the importance of understanding the spatio‑temporal dynamics of microplastic distribution.Al Hoceima Marine protected areas exhibiting lower microplastic concentrations illustrate the eficacy of such zones in alleviating pollution impacts,thereby underscoring the signiicance of conservation efforts in safeguarding marine biodiversity and ecosystem resilience.Ultimately,our research enhances our comprehension of the pressures exerted by humans on marine environments and underscores the necessity of proactive conservation measures to shield marine ecosystems from the threats posed by microplastic pollution.
基金Supported by Research grant from Chang Gung Memorial Hospital,Linkou,Taiwan,No.CMRPG3N0622.
文摘The issue of plastic pollutants has become a growing concern.Both microplastics(MPs)(particle size<5 mm)and nanoplastics(NPs)(particle size<1μm)can cause DNA damage,cytotoxicity,and oxidative stress in various organisms.The primary known impacts of microplastic/nanoplastic are observed in the liver and respiratory system,leading to hepatotoxicity and chronic obstructive pulmonary disease.Although research on the effects of MPs and NPs on diabetes is still in its early stages,there are potential concerns.This editorial highlights the risk to diabetics from co-exposure to contaminants and MPs/NPs,supported by evidence from animal studies and the various chemical compositions of MPs/NPs.
文摘As a new type of pollutant,the harm caused by microplastics(MPs)to organisms has been the research focus.Recently,the proportion of MPs ingested through the digestive tract has gradually increased with the popularity of fast-food products,such as takeout.The damage to the digestive system has attracted increasing attention.We reviewed the literature regarding toxicity of MPs and observed that they have different effects on multiple organs of the digestive system.The mechanism may be related to the toxic effects of MPs themselves,interactions with various substances in the biological body,and participation in various signaling pathways to induce adverse reactions as a carrier of toxins to increase the time and amount of body absorption.Based on the toxicity mechanism of MPs,we propose specific suggestions to provide a theoretical reference for the government and relevant departments.
基金Supported by Zhaoqing University Innovation and Entrepreneurship Training Program for College Students (X202410580130).
文摘This paper summarizes the mechanisms and environmental effects of interactions between microplastics and surfactants: surfactants adsorb onto microplastics surfaces through hydrophobic interactions and electrostatic forces, changing their surface properties and transport behavior. In addition, microplastics act as carriers influencing surfactant distribution. Environmental factors (pH, ionic strength, etc. ) significantly regulate this process. Current research still has limitations in areas such as desorption kinetics and combined pollution effects, necessitating in-depth studies under environmentally relevant conditions to provide a basis for risk assessment.
基金the Natural Science Foundation of Guangdong Province(No.2021B1515020041)the National Natural Science Foundation of China(No.42277403)+4 种基金the Projects of International Cooperation and Exchange of the National Natural Science Foundation of China(NSFC-UNEP)(No:32261143459)the Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control(No.2023B1212060002)the Guangdong Major Project of Basic and Applied Basic Research(No.2023B0303000024)the High-level University Special Fund(No.G03050K001)the Research Projects of the General Administration of Customs(No.2022HK060)for financial support.
文摘As the main component of electronic products,plastics contain complex and diverse metal additives.Recycling process is not conducive to stable existence of metal additives in electronic plastics.Once the e-waste plastics enter the environment,they will continue to release harmful metals into environment after aging,causing serious hazards.This study delved into the analysis and comparison of metal content of e-waste plastics,elucidating aging process and metal leaching behavior over a 112-day natural light exposure period.The findings underscored that metal content in recycled plastics surpassed that in their new counterparts.Specifically,Ti content in new plastics remained below 100 mg/kg,while recycled plastics exhibited Ti content surpassing 100 mg/kg threshold.Throughout prolonged natural light exposure,metals such as Zn,Ba and Sb demonstrated a heightened likelihood of release from electronic plastics in comparison to other metals.The aging process during light exposure led to fragmentation of electronic plastics,accompanied by a reduction in particle size.Notably,the particle size reduction was more pronounced in poly acrylonitrile butadiene styrene(ABS)and recycled ABS,experiencing reductions of 40µm and 85µm,respectively.This phenomenon was attributed to the presence of polybutadiene structural units,which proved more susceptible to aging.Along with the breaking of plastics,the ABS plastics released metal species such as Pb,Cd,Ni,Al that had not been detected in other plastics solutions.The collective evidence from this study suggested that ABS and recycled ABS electronic plastics might pose a heightened potential environmental risk compared to other electronic plastics.
基金supported by the National Natural Science Foundation of China(Nos.42077337 and 42277228)the Guangdong Basic and Applied Basic Research Foundation(No.2020A1515011560)the Science and Technology Planning Project of Guangzhou(Nos.202002030297 and 202002020072).
文摘Microplastics loaded with phenanthrene and derivatives are widely detected in aquatic environments,and the coating of natural minerals or organic macromolecules may change the environmental behavior of microplastics.In this study,three kinds of composites with different coverage were prepared by coating goethite on the surface of polyvinyl chloride microplastics to investigate the adsorption and desorption behavior of phenanthrene(PHE)and 1-hydroxyphenanthrene(1-OHPHE),and the effect of mucin on desorption was inves-tigated.The results showed that goethite promoted the adsorption of PHE and 1-OHPHE by increasing the specific surface area of the composites.With the increase of the cover de-gree,the adsorption of PHE decreased because of the decrease in hydrophobicity;while the adsorption of 1-OHPHE initially increased and then decreased with the contributions of hydrophobic interaction and hydrogen bond.The adsorption of 1-OHPHE could be influenced by the pH and ionic strength primarily through electrostatic interactions and Ca2+bridg-ing.The goethite significantly increased the desorption hysteresis for two chemicals due to the complicated pore structures and increased adsorption affinity.Mucin promoted the desorption of PHE through competitive adsorption,and inhibit the desorption of 1-OHPHE through hydrophobic interaction,hydrogen bonding and Ca2+bridging.This study elucidated the effects of natural minerals on the adsorption and desorption behavior of organic pollutants on microplastics,briefly discussed the effects of organic macromolecules on the desorption behavior of pollutants with different properties,and emphasized the different environmental behaviors of pollutants.
基金supported by the National Natural Science Foundation of China(No.42077120)the Special Foundation for Taishan Scholar of Shandong Province(2023)the Project of Talent Introduction and Education Program of Youth Innovation Teams in Universities of Shandong Province(No.2021-05).
文摘Microplastics(MPs) are an emerging environmental pollutant and have penetrated the most remote and primitive areas. MPs degradation has received widespread attention. Manganese(Mn) is a highly reactive metal element in the environment, yet its contribution to MPs degradation remains unclear. Herein,we simulated the aging of polyethylene MPs with Mn(Ⅱ) under aqueous conditions at pH 5 and 8 for720 days. Mn greatly promoted the MPs degradation, and the average particle sizes of polyethylene MPs were reduced from 9.2 μm to 5.9 μm after aging at pH 5 under light irradiation for 720 days. Plenty of oxygen-containing groups were generated on the MPs surfaces, and the carbonyl index remarkably increased, reaching four times that of the control without adding Mn. Mechanistically, the adsorbed Mn(Ⅱ)on the MPs surfaces were primarily oxidized to high-valence Mn(Ⅲ/Ⅳ) profited from the photoproduced radicals, followed by the MPs oxidation via Mn(Ⅲ/Ⅳ), which were reduced to regenerate Mn(Ⅱ), initiating a new redox cycling. During the degradation, dissolved organic matter was continuously released, mainly including bisphenol A and phthalic acid esters. Mn acts as a catalyst to accelerate the MPs degradation by redox cycling. Our results provide a new insight into the mechanisms of abiotic degradation of MPs in aqueous environments.
基金The Natural Science Foundation of China under contract Nos 41806130 and 42407149the National Science Foundation for Post-doctoral Scientists of China under contract No.2024M750629+2 种基金the Natural Science Foundation of Guangdong Province under contract No.2018A0303130063the Marine Ecological Survey and Evaluation in Guangdong Province under contract No.0877-23GZTP01F179the Project of the Marine Geological Survey Program of China Geological Survey under contract Nos DD20230460,DD20242792,DD20211394,and DD20190308.
文摘The contamination and accumulation of microplastics(MPs)in mangrove ecosystems have become an increasing concern due to their potential ecological risks.This study investigated and analyzed the abundance of MPs in sediments,water,and benthos of mangrove areas(MA)and adjacent non-vegetated areas(NA)in Qinglan Bay.Results showed that the abundance of MPs in MA was significantly higher than in adjacent NA[sediment:(4.39±2.20)items/50 g dry weight(dw)vs.(4.10±2.71)items/50 g dw;water:(11.79±7.61)items/L vs.(10.61±5.93)items/L;benthos:(4.94±5.27)items/individual vs.(3.5±0.71)items/individual].The primary components identified in sediments and benthos were rayon and cellulose,while polyethylene(PE)and polypropylene(PP)dominated in water.Smaller MPs(<1000μm)accounted for 44%,43%,and 61%of the MPs in sediments,water,and benthos,respectively,indicating that smaller MPs are more likely to be ingested or captured by benthic organisms.Additionally,MPsenrichment was calculated in benthos[enrichment index(EI)=1.41],water(EI=1.11),and sediments(EI=1.09),confirming that the unique ecological environment of the MA leads to different distribution and accumulation characteristics of MPs compared to the NA.The ecological risk assessment revealed low MPs pollution levels in sediments and water,but higher risks were observed for polychaetes and bivalves.
基金Supported by National Natural Science Foundation of China,No.82470939 and No.82170921.
文摘Microplastics(MPs),defined as plastic particles with diameters less than 5 mm,have become significant global environmental contaminants.MPs accumulate in human tissues and organs,raising significant concerns about their potential biological toxicity.Evidence indicates that MPs and associated toxins disrupt stem cell self-renewal,proliferation,and differentiation processes essential for tissue regeneration and systemic homeostasis,yet research on MP-induced stem cell damage remains limited.To identify relevant and recent studies,we searched the PubMed database using title and abstract fields.This review synthesizes current evidence across organ systems,including nervous,hematopoietic,skeletal,and urinary systems,to systematically categorize phenotypic disruptions and un-derlying mechanisms in stem cells.We further evaluate the utility of stem-cell-derived organoids in modeling organ-specific MP toxicity.By consolidating fragmented findings,this work provides a critical framework for assessing MP risks to tissue regeneration and informs strategies for regenerative medicine and public health protection.
基金supported by the National Youth Foundation of China(No.52000064)the National Natural Science Foundation of China(No.U20A20323)+5 种基金the Natural Science Foundation of Hunan Province(No.2023JJ0013)the Special Funding for the Construction of Hunan’s Innovative Province(No.2021SK2040)the Science and Technology Innovation Program of Hunan Province(No.2021RC3133)the National Youth Foundation of China(No.52300227)the HunanMunicipal Natural Science Foundation(No.2023JJ41048)the Changsha Municipal Natural Science Foundation(No.kq2208423).
文摘Microplastics(MPs)are of particular concern due to their ubiquitous occurrence and propensity to interact and concentrate various waterborne contaminants from aqueous surroundings.Studies on the interaction and joint toxicity of MPs on engineered nanoparticles(ENPs)are exhaustive,but limited research on the effect of MPs on the properties of ENPs in multisolute systems.Here,the effect of MPs on adsorption ability of ENPs to antibiotics was investigated for the first time.The results demonstrated that MPs enhanced the adsorption affinity of ENPs to antibiotics and MPs before and after aging showed different effects on ENPs.Aged polyamide prevented aggregation of ZnONPs by introducing negative charges,whereas virgin polyamide affected ZnONPs with the help of electrostatic attraction.FT-IR and XPS analyses were used to probe the physicochemical interactions between ENPs and MPs.The results showed no chemical interaction and electrostatic interactionwas the dominant force between them.Furthermore,the adsorption rate of antibiotics positively correlated with pH and humic acid but exhibited a negative correlation with ionic strength.Our study highlights that ENPs are highly capable of accumulating and transporting antibiotics in the presence of MPs,which could result in a widespread distribution of antibiotics and an expansion of their environmental risks and toxic effects on biota.It also improves our understanding of the mutual interaction of various co-existing contaminants in aqueous environments.
基金Supported by the Southern Marine Science and Engineering Guangdong Laboratory、Zhanjiang(No.ZJW-2019-08)APN、CRRP2019-09MYOnodera、Shinichi Onodera、and the SCS Scholar Grant(No.002029002008/2019)。
文摘Plastic pollution and microplastics in sediments are a growing concern for marine ecosystems worldwide.We examined the vertical distribution and properties of microplastics in beach sediments of Xuwen Coral Reef National Nature Reserve,in Leizhou Peninsula,Zhanjiang,China.Sediment samples were taken in seven locations at 5-cm intervals from the surface to a depth of 30 cm.The vertical distribution of microplastic particles ranged from 0 to 1340 particles per kg on average of 119.05particles per kg.The most prevalent material was fibers(76%),followed by film(12%),fragments(11.2%),and foam(0.8%).The microplastics in size of 1-2 mm constituted the largest percentage(40%)of the total,followed by those in size of<1 mm(26.4%),2-3 mm(21.2%),3-4 mm(9.6%),and 4-5 mm(2.81%).Site S1 observed maximum sizes between 1 and 2 mm,S2 reported higher availability of microplastics with sizes ranging from 0.3 to 1 mm.Six different types of polymers were identified in the investigation,and mostly were polyethylene(PE)and polypropylene(PP).In general,the observation of microplastics in deeper sediments indicates that they have the ability to last for prolonged periods in the marine environment,which may present long-term hazards to benthic creatures.In conclusion,the discovery of microplastics in deep layers of coastal sediments highlights the necessity of minimizing plastic waste and enhancing management strategies to safeguard marine environments.
基金supported by the National Natural Science Foundation of China(No.52100039)the Fundamental Research Funds for the Central Universities(No.531118010896).
文摘Co-exposure of pharmaceuticals and microplastics(MPs)significantly exacerbates the aquatic environmental pollution issue.While MPs are identified as carriers of pollutants,research on the adsorption behaviors of biodegradable and conventional MPs to pharmaceuticals limited.The study investigated the adsorption behavior of conventional MPs(polystyrene and polyethylene terephthalate),biodegradable MPs polylactic acid(PLA)and polybutylene succinate(PBS)for sulfamethoxazole(SMX).Meanwhile,changes in physicalchemical properties,including morphology,crystallinity,hydrophobicity and structures of MPs after aging(e.g.,ultraviolet treatment)were investigated.Results exhibited that the oxygen-containing functional groups of MPs surface increased after ultraviolet treatment and enhanced the adsorption capacity for SMX,except for PLA.PLA exhibits the highest adsorption capacity,primarily due to its higher hydrophobicity and larger pore size.In contrast,PBS shows the lowest adsorption affinity for SMX because of its hydrophilicity and small pore size.The adsorption capacity of degradable MPs after aging is greater than that of non-degradable MPs.Electrostatic interaction and hydrophobic interaction are the main mechanisms of adsorption of virgin MPs,while hydrogen bond interaction and electrostatic interaction are the primary adsorption mechanisms for aged MPs.These results contribute to understanding the co-transport and migration of SMX and MPs in the environment,and furnish the necessary data for their ecological risk assessment.
文摘This communication looks at the photo-oxidation of polythene and polypropylene plastic bottle tops that are placed on soil in a hot arid environment. The degree of oxidation of the plastic is monitored by FT-IR spectroscopy. It is noted that while different bottle top types photo-oxidize at different rates, all show an appreciable level of oxidation after half a year of exposure to the environment. The oxidation leads to brittleness of the plastic, which leads to fissure formation in bottle tops of little thickness. This leads to fragmentation of the material upon impact, making plastic bottle tops an appreciable source of microplastics.
基金the Laoshan Laboratory(No.LSKJ202203901)the Natural Science Foundation of Shandong Province,China(No.ZR2021MD079)+1 种基金the APEC Cooperation Fund(No.WJ1323001)the Asian Cooperation Fund(Nos.WJ1223001,WJ0923015)。
文摘To explore the relationship of microplastic pollution in different media in marine environment,microplastics in the surface seawater and sediments of Laizhou Bay,Bohai Sea,North China,were studied.Seawater samples were collected using a pre-concentrator equipped with a 20-μm mesh size sieve,and sediment samples were collected by a box sampler.The shape,color,size,and type of microplastics were obtained by a stereomicroscope and a Fourier transform infrared spectrometer(ATR-μ-FT-IR).Results show that the abundance of microplastics in the surface seawater of Laizhou Bay was 858.3±573.2 items/m~3,and that of microplastics in sediments was 151.0±77.4 items/kg dry weight(d.w.)The microplastics in seawater and sediments were mainly fibrous.Meanwhile,the microplastics in seawater were mainly transparent,and those in sediments were transparent and blue.The highest proportion of microplastics in seawater was rayon(77.48%),followed by polyethylene terephthalate(PET,13.17%).The highest proportion of microplastics in sediments was rayon(73.66%),followed by PET(8.90%).The size of microplastics in 1000-2000μm accounted for the largest proportion of 28.54%in seawater,while that in 500-1000μm took 27.93%in sediment.Microplastics in seawater and sediment showed medium-level pollution.In seawater,microplastic abundance was higher in offshore and nearshore areas of Weifang.In sediment,microplastic abundance was higher in offshore and nearshore areas of Dongying.The results of the principal component analysis(PCA)indicated that microplastics in sediment exhibited greater stability compared to those in seawater.The microplastics in seawater and sediment show a positive correlation in terms of shape and plastic type,while exhibiting a negative correlation in terms of color.Overall,microplastics in sediments were smaller in size,and those in seawater and sediments had consistent size distribution characteristics in space.
基金supported by the Major Projects of Natural Science Research for University and Colleges in Jiangsu Province(No.21KJA240001)the Key Research and Development Program of Jiangsu Province(No.BE2018348)+2 种基金partially by the Jiangsu Agricultural Science and Technology Innovation Fund(No.CX(22)3199)the Projects for the High-Quality Development of Fishery Industry of Yancheng City(No.YCSCYJ20210014)supported financially by the projects for‘Six Talents’of Jiangsu Province(No.NY115)。
文摘Microplastics(MPs)pollution has become a worldwide environmental problem.The study about the effects of microplastics on fish,especially on the fish immune system is limited.In the present study,the transcriptome of soiny mullet(Liza haematocheila)larvae at 7 d and 14 d post 0.5μm MPs exposure were analyzed by DNBSEQ platform.A total number of 96585 unigenes were obtained with average length of 1925 bp.Approximately 72.48%(70004),76.80%(74176),and 62.94%(60787)unigenes were matched with the annotated sequences for non-redundant(NR),NCBI nucleotide(NT)and Swissprot database,respectively.Compared with control group,1336 differently expressed genes(DEGs)were identified at 7 d post MPs exposure.As the MPs exposure time extended to 14 d,the number of DEGs in the MPs exposure group reached to 3561.Further,KEGG enrichment analysis revealed that several immune-related pathways,such as interleukin(IL)-17 signaling pathway,tumor necrosis factor(TNF)signaling pathway,were affected by MPs exposure.In addition,apoptosis signaling pathway was also enriched under MPs exposure.These results demonstrated that MPs can alter the expressions of immune-related genes,providing basis for understanding the immune toxicity of MPs on fish and other vertebrates.
基金supported by the National Key Research and Development Program of China(No.2021YFD1700803)the Province Key Research and Development Program of Jiangsu,China(No.D21YFD17008)the National Natural Science Foundation of China(No.41771295).
文摘Due to their resistance to degradation,wide distribution,easy diffusion and potential uptake by organisms,microplastics(MPs)pollution has become a major environmental concern.In this study,PEG-modified Fe_(3)O_(4)magnetic nanoparticles demonstrated superior adsorption efficiency against polyethylene(PE)microspheres compared to other adsorbents(bare Fe_(3)O_(4),PEI/Fe_(3)O_(4)and CA/Fe_(3)O_(4)).Themaximumadsorption capacity of PEwas found to be 2203 mg/g by adsorption isotherm analysis.PEG/Fe_(3)O_(4)maintained a high adsorption capacity even at low temperature(5℃,2163 mg/g),while neutral pH was favorable for MP adsorption.The presence of anions(Cl^(-),SO_(4)^(2-),HCO_(3)^(-),NO_(3)^(-))and of humic acids inhibited the adsorption of MPs.It is proposed that the adsorption process was mainly driven by intermolecular hydrogen bonding.Overall,the study demonstrated that PEG/Fe_(3)O_(4)can potentially be used as an efficient control against MPs,thus improving the quality of the aquatic environment and of our water resources.
