Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary health.Despite global efforts to mitigate legacy pollutants,the continuous introduction of new su...Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary health.Despite global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the planet.In response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental Science-Policy Panel on Chemicals,Waste,and Pollution Prevention.This review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health approach.Strategies for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international levels.Urgent actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.展开更多
In this study, we report on the extraction, characterization, and potential applications of colloidal biochar derived from pyrolyzed wood-an untapped source of carbonaceous particles.A series of characterizations was ...In this study, we report on the extraction, characterization, and potential applications of colloidal biochar derived from pyrolyzed wood-an untapped source of carbonaceous particles.A series of characterizations was performed on biochar colloids to unravel their colloidal properties and surface chemistry through which it was found that they have a net negative charge and are stable between pH 3 and 10.Moreover,our initial toxicity tests showed that biochar colloids themselves are not toxic and they can be used in remediation applications,which led us to investigate(1)their copper sorption,a model inorganic contaminant,in a scenario that biochar colloids are released into the environment and(2)their potential use in organic pollutants adsorption and degradation.Copper sorption studies showed that biochar colloids have a copper sorption capacity as high as 22 mg g^(−1) in sub-ppm copper solutions.This increased the acute 48 h lethal concentration(LC50)of copper for Daphnia magna by 21 ppb,which is comparable to the previously reported effect by dissolved organic matter.Adsorption and degradation of methylene blue(MB),an often-used proxy for organic contaminants in water,were studied by coupling the biochar colloids to positively charged TiO_(2) nanoparticles and using it as a photocatalyst.The hybrid MB photodegradation efficiency was 21%higher than that of TiO_(2) nanoparticles alone.Enhancement of demethylation is proposed as the main degradation mechanism of MB,as confirmed by liquid chromatography-mass spectroscopy(LC/MS),and the positive impact of biochar colloids is ascribed to their abundant adsorption sites,which may facilitate MB adsorption and its photocatalytic degradation.展开更多
Despite an abundance of short-term studies focusing on biochar’s effects on annual plants,the long-term effects of biochar on perennial plants and the effects of the biochar on the mobility and speciation changes of ...Despite an abundance of short-term studies focusing on biochar’s effects on annual plants,the long-term effects of biochar on perennial plants and the effects of the biochar on the mobility and speciation changes of metals/metalloids not limited to main plant nutrients in soils are poorly constrained.This study reports on the amelioration a sloped orthic ferralsol by biochar from Tibouchina wood and the resulting effects on perennial crops and microbiota,including a comprehensive analysis of metals/metalloids speciation changes.Fields were amended with biochar and urine-amended biochar(2 kg/m^(2))and were planted with papaya,banana,and manioc.Soil and plant materials were analyzed using acid digestions,sequential extractions,and 16S rRNA gene sequencing.Biochar applications led to decreased soil acidity,shifted the cation exchange capacity from being Al-influenced to being Mg/K/Ca-dominated,and elevated the concentrations of Mg,K,Ca,Zn,and Ba in soils.The exchangeable/acid-soluble fraction of Ca,P,and S notably increased.The soil microbial biome became more species rich and diverse in the biochar-amended fields.Manioc benefited from biochar applications,demonstrating increased growth,which resulted in generally decreased concentrations of trace elements in most plant parts,however,with an increased total elemental uptake.Urine amendment contributed to higher concentrations of P,S,and K in soils,but did not further increase plant growth.Biochar was shown to be a promising soil amendment for agricultural use of orthic ferralsols of the Brazil’s Atlantic forest region,but the accumulation of potentially harmful metals needs to be considered.展开更多
基金funded by the National Key Research and Development Program of China(2020YFC1807000)the Strategic Priority Research Program of the Chinese Academy of Sciences(no.XDA28030501)+9 种基金the National Natural Science Foundation of China(41991333,41977137,42090060)the International Atomic Energy Agency Research Project(D15022)the Youth Innovation Promotion Association of Chinese Academy of Sciences(2011225[Fang Wang],Y201859[H.Wang],2013201[J.Su],2021309[Y.Song],Y2022084[M.Ye])Chinese Academy of Sciences President’s International Fellowship Initiative(2020DC0005,2022DC0001,2024DC0009)the Institute of Soil Science,Chinese Academy of Sciences(ISSAS2419)the Research Group Linkage project from Alexander von Humboldt foundation,the Center for Health Impacts of Agriculture(CHIA)of Michigan State University,and the URI STEEP Superfund Center(grant#P42ES027706)Fang Wang was partly supported by the fellowship of Alexander von Humboldt for experienced researchers,and Shennong Young Talents of the Ministry of Agriculture and Rural Affairs,China(SNYCQN006-2022)J.P.and T.R.S.were supported by the Canada Research Chair program.B.W.B.was supported by a Royal Society of New Zealand Catalyst International Leaders fellowship.K.K.B.was supported by Innovation Fund Denmark and the European Commission Horizon 2020 financed under the ERA-NET Aquatic Pollutants Joint Transnational Call(REWA,GA no.869178)S.A.H.was partly supported by a grant from the National Institute of Environmental Health Sciences,National Institutes of Health grant number P42ES04911-29(Project 4)T.R.S.thanks CESAM by FCT/MCTES(UIDP/50017/2020+UIDB/50017/2020+LA/P/0094/2020)。
文摘Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary health.Despite global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the planet.In response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental Science-Policy Panel on Chemicals,Waste,and Pollution Prevention.This review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health approach.Strategies for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international levels.Urgent actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.
基金This work was supported by a Natural Sciences and Engineering Research Council(NSERC)Discovery grant(RGPIN-04134)to D.S.A.
文摘In this study, we report on the extraction, characterization, and potential applications of colloidal biochar derived from pyrolyzed wood-an untapped source of carbonaceous particles.A series of characterizations was performed on biochar colloids to unravel their colloidal properties and surface chemistry through which it was found that they have a net negative charge and are stable between pH 3 and 10.Moreover,our initial toxicity tests showed that biochar colloids themselves are not toxic and they can be used in remediation applications,which led us to investigate(1)their copper sorption,a model inorganic contaminant,in a scenario that biochar colloids are released into the environment and(2)their potential use in organic pollutants adsorption and degradation.Copper sorption studies showed that biochar colloids have a copper sorption capacity as high as 22 mg g^(−1) in sub-ppm copper solutions.This increased the acute 48 h lethal concentration(LC50)of copper for Daphnia magna by 21 ppb,which is comparable to the previously reported effect by dissolved organic matter.Adsorption and degradation of methylene blue(MB),an often-used proxy for organic contaminants in water,were studied by coupling the biochar colloids to positively charged TiO_(2) nanoparticles and using it as a photocatalyst.The hybrid MB photodegradation efficiency was 21%higher than that of TiO_(2) nanoparticles alone.Enhancement of demethylation is proposed as the main degradation mechanism of MB,as confirmed by liquid chromatography-mass spectroscopy(LC/MS),and the positive impact of biochar colloids is ascribed to their abundant adsorption sites,which may facilitate MB adsorption and its photocatalytic degradation.
基金This study was financially supported by the Natural Sciences and Engineering Research Council of Canada(Discovery Grant RGPIN-04134 to D.S.A.)the Graduate Student Association(travel Grant to K.v.G.)the Faculty of Graduate Studies and Research(travel Grant to M.H.)。
文摘Despite an abundance of short-term studies focusing on biochar’s effects on annual plants,the long-term effects of biochar on perennial plants and the effects of the biochar on the mobility and speciation changes of metals/metalloids not limited to main plant nutrients in soils are poorly constrained.This study reports on the amelioration a sloped orthic ferralsol by biochar from Tibouchina wood and the resulting effects on perennial crops and microbiota,including a comprehensive analysis of metals/metalloids speciation changes.Fields were amended with biochar and urine-amended biochar(2 kg/m^(2))and were planted with papaya,banana,and manioc.Soil and plant materials were analyzed using acid digestions,sequential extractions,and 16S rRNA gene sequencing.Biochar applications led to decreased soil acidity,shifted the cation exchange capacity from being Al-influenced to being Mg/K/Ca-dominated,and elevated the concentrations of Mg,K,Ca,Zn,and Ba in soils.The exchangeable/acid-soluble fraction of Ca,P,and S notably increased.The soil microbial biome became more species rich and diverse in the biochar-amended fields.Manioc benefited from biochar applications,demonstrating increased growth,which resulted in generally decreased concentrations of trace elements in most plant parts,however,with an increased total elemental uptake.Urine amendment contributed to higher concentrations of P,S,and K in soils,but did not further increase plant growth.Biochar was shown to be a promising soil amendment for agricultural use of orthic ferralsols of the Brazil’s Atlantic forest region,but the accumulation of potentially harmful metals needs to be considered.
