Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126226
Bingzheng Tian , Min Zhang , Chao Zhu , Ruifang Yang , Gaofang Yin , Shuanggang Hu , Yihan Chen , Nanjing Zhao
Antibiotics are prevalent in aquatic ecosystems, particularly in critical drinking water sources, posing serious threats to human health and ecosystems. Focusing on rivers, lakes, reservoirs and groundwaters in Anhui Province (China), this study systematically investigated the occurrence, influencing factors and source apportionment of antibiotics and assessed their ecological and health risks. The results indicated that the total antibiotic concentrations ranged from 0.04 to 215.13 ng/L, and lincosamides and sulfonamides were the primary antibiotic groups, with concentrations of nd-167.00 ng/L and nd-47.38 ng/L, respectively. Specifically, lincomycin (nd-159.38 ng/L) and clindamycin (nd-100.45 ng/L) were the concentration of the two highest antibiotics, while sulfamethoxazole had the highest detection frequency (86.16 %). The total concentration of antibiotics in rivers was significantly higher than in lakes, reservoirs, and groundwaters, and the structural composition of antibiotics in groundwaters differed distinctly from that in other water sources. Nitrogen levels showed significant spatial correlation with antibiotic distribution, and anthropogenic activities may exacerbate antibiotic contamination. The study identified farmland drainage and aquaculture as the main sources of antibiotics in rivers and reservoirs, respectively, while livestock was the main source in lakes and groundwaters. The maximum ecological and human health risk quotient (8.83 and 0.32) of rivers was higher than that of other water sources. Antibiotics posing ecological risks included sulfamethoxazole, lincomycin, clindamycin, and clarithromycin, while tylosin and lincomycin exhibited potential threats to human health. Although the risks posed by individual antibiotics and their combined effects were within acceptable limits, the long-term exposure to low-dose antibiotics in drinking-water sources warrants close attention and further investigation.
{"title":"Contrastive cognition into the occurrence, source identification and risk assessment of antibiotics in various drinking water sources","authors":"Bingzheng Tian , Min Zhang , Chao Zhu , Ruifang Yang , Gaofang Yin , Shuanggang Hu , Yihan Chen , Nanjing Zhao","doi":"10.1016/j.envpol.2025.126226","DOIUrl":"10.1016/j.envpol.2025.126226","url":null,"abstract":"<div><div>Antibiotics are prevalent in aquatic ecosystems, particularly in critical drinking water sources, posing serious threats to human health and ecosystems. Focusing on rivers, lakes, reservoirs and groundwaters in Anhui Province (China), this study systematically investigated the occurrence, influencing factors and source apportionment of antibiotics and assessed their ecological and health risks. The results indicated that the total antibiotic concentrations ranged from 0.04 to 215.13 ng/L, and lincosamides and sulfonamides were the primary antibiotic groups, with concentrations of nd-167.00 ng/L and nd-47.38 ng/L, respectively. Specifically, lincomycin (nd-159.38 ng/L) and clindamycin (nd-100.45 ng/L) were the concentration of the two highest antibiotics, while sulfamethoxazole had the highest detection frequency (86.16 %). The total concentration of antibiotics in rivers was significantly higher than in lakes, reservoirs, and groundwaters, and the structural composition of antibiotics in groundwaters differed distinctly from that in other water sources. Nitrogen levels showed significant spatial correlation with antibiotic distribution, and anthropogenic activities may exacerbate antibiotic contamination. The study identified farmland drainage and aquaculture as the main sources of antibiotics in rivers and reservoirs, respectively, while livestock was the main source in lakes and groundwaters. The maximum ecological and human health risk quotient (8.83 and 0.32) of rivers was higher than that of other water sources. Antibiotics posing ecological risks included sulfamethoxazole, lincomycin, clindamycin, and clarithromycin, while tylosin and lincomycin exhibited potential threats to human health. Although the risks posed by individual antibiotics and their combined effects were within acceptable limits, the long-term exposure to low-dose antibiotics in drinking-water sources warrants close attention and further investigation.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126226"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126239
Théo Jamay, Philippe Noirez, Haidar Djemai, Layale Youssef, Justine Massias, Sadia Ouzia, German Cano-Sancho, Patricia Margaritte-Jeannin, Florence Jornod, Etienne Blanc, Xavier Coumoul, Yann Guitton, Bruno Le Bizec, Jean-Philippe Antignac, Philippe Marchand, Covadonga Lucas-Torres, Nicolas Giraud, Gildas Bertho, Min Ji Kim, Karine Audouze
Persistent organic pollutants (POPs) are associated with many adverse health effects in humans, including cancers, immune, reproductive, neurological disorders and metabolic diseases. These chemicals are known to accumulate in fatty tissues, from which they can be released in other tissue compartments of living organisms, in particular, upon weight loss. This dynamic distribution of POPs remains, however poorly investigated. In this study, a xenografted POP-contaminated adipose tissue (AT) model was used to assess 1) their concentrations in the ATs, the liver and the brain and 2) their associated effects by transcriptomics, metabolomics and lipidomics approaches. In the ATs, the liver and the brain of mice grafted with POP-contaminated fat pad, most of POPs were detected 3 days and 21 days after the graft with the highest concentrations in the ATs and the lowest concentrations in the brain. Conversely, per- and polyfluoroalkyl substances presented a distinct profile as they persist in the liver but not in the ATs or in the brain. In the AT of POP-exposed mice, the most dysregulated pathways were related to mitochondrial functions, endobiotic (carbohydrate, lipid, amino acid) and xenobiotic metabolism and inflammatory response. In the liver of grafted mice, many pathways related to mitochondrial functions and metabolism were dysregulated. These results support that realistic mixture of POPs that accumulate in AT and liver induces a systemic metabolic dysfunction which may represent the mechanisms by which the POPs can promote metabolic diseases such as obesity, type 2 diabetes and cardiovascular diseases.
{"title":"Characterization of POP mixture redistribution and identification of their molecular signature in xenografted fat mice.","authors":"Théo Jamay, Philippe Noirez, Haidar Djemai, Layale Youssef, Justine Massias, Sadia Ouzia, German Cano-Sancho, Patricia Margaritte-Jeannin, Florence Jornod, Etienne Blanc, Xavier Coumoul, Yann Guitton, Bruno Le Bizec, Jean-Philippe Antignac, Philippe Marchand, Covadonga Lucas-Torres, Nicolas Giraud, Gildas Bertho, Min Ji Kim, Karine Audouze","doi":"10.1016/j.envpol.2025.126239","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126239","url":null,"abstract":"Persistent organic pollutants (POPs) are associated with many adverse health effects in humans, including cancers, immune, reproductive, neurological disorders and metabolic diseases. These chemicals are known to accumulate in fatty tissues, from which they can be released in other tissue compartments of living organisms, in particular, upon weight loss. This dynamic distribution of POPs remains, however poorly investigated. In this study, a xenografted POP-contaminated adipose tissue (AT) model was used to assess 1) their concentrations in the ATs, the liver and the brain and 2) their associated effects by transcriptomics, metabolomics and lipidomics approaches. In the ATs, the liver and the brain of mice grafted with POP-contaminated fat pad, most of POPs were detected 3 days and 21 days after the graft with the highest concentrations in the ATs and the lowest concentrations in the brain. Conversely, per- and polyfluoroalkyl substances presented a distinct profile as they persist in the liver but not in the ATs or in the brain. In the AT of POP-exposed mice, the most dysregulated pathways were related to mitochondrial functions, endobiotic (carbohydrate, lipid, amino acid) and xenobiotic metabolism and inflammatory response. In the liver of grafted mice, many pathways related to mitochondrial functions and metabolism were dysregulated. These results support that realistic mixture of POPs that accumulate in AT and liver induces a systemic metabolic dysfunction which may represent the mechanisms by which the POPs can promote metabolic diseases such as obesity, type 2 diabetes and cardiovascular diseases.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"108 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126246
Juhee Kim , Heyyeon Lim , Yoojin Jang , Minseok Park , Deok Hyun Moon , Goontaek Lee , Seunghun Hyun
Chemical amendments are frequently applied to immobilize toxic elements in contaminated soils. However, remobilization of elements in amended soils is poorly understood. The elution of metallic elements (Zn, As, Cd, and Pb) from mine soil amended with mine sludge (MS), steel slag (SS), and limestone (LS) was evaluated using batch leaching tests under continuous wetting and intermittent drying. The elements were effectively immobilized by the three amendments, as evidenced by the reductions in the labile fraction (10.6–78.8 %) of SEP (sequential extraction procedure) and cumulative mass (42.0–98.5 %) during 14 leaching runs. Drying events increased the leaching potential by 2.9-fold and 4.4-fold for the eluted mass (μg) and depletion rate (k, h−1), respectively. The depletion rate of cationic elements (e.g., Zn, Cd, and Pb) from the amended samples (MSS, SSS, and LSS) correlated with the leachate pH (r2 > 0.583), while the leaching of anionic element (e.g., As) from MSS and SSS correlated well with the leachate concentration of Fe (r2 = 0.898). The findings indicate that drying events can substantially increase the remobilization of metallic elements from amended soils. Moreover, change in the leachate phase, such as the pH drop (up to 1.5 unit) and/or the Fe concentration rise (up to 62 %), can be an early sign of the increased remobilization potential of metallic elements in amendment-treated remediation sites.
{"title":"Effect of drying treatment on the leachability of metallic elements (Zn, As, Cd, and Pb) from amended mine soils during batch leaching experiments","authors":"Juhee Kim , Heyyeon Lim , Yoojin Jang , Minseok Park , Deok Hyun Moon , Goontaek Lee , Seunghun Hyun","doi":"10.1016/j.envpol.2025.126246","DOIUrl":"10.1016/j.envpol.2025.126246","url":null,"abstract":"<div><div>Chemical amendments are frequently applied to immobilize toxic elements in contaminated soils. However, remobilization of elements in amended soils is poorly understood. The elution of metallic elements (Zn, As, Cd, and Pb) from mine soil amended with mine sludge (MS), steel slag (SS), and limestone (LS) was evaluated using batch leaching tests under continuous wetting and intermittent drying. The elements were effectively immobilized by the three amendments, as evidenced by the reductions in the labile fraction (10.6–78.8 %) of SEP (sequential extraction procedure) and cumulative mass (42.0–98.5 %) during 14 leaching runs. Drying events increased the leaching potential by 2.9-fold and 4.4-fold for the eluted mass (μg) and depletion rate (<em>k</em>, h<sup>−1</sup>), respectively. The depletion rate of cationic elements (e.g., Zn, Cd, and Pb) from the amended samples (MSS, SSS, and LSS) correlated with the leachate pH (<em>r</em><sup>2</sup> > 0.583), while the leaching of anionic element (e.g., As) from MSS and SSS correlated well with the leachate concentration of Fe (<em>r</em><sup>2</sup> = 0.898). The findings indicate that drying events can substantially increase the remobilization of metallic elements from amended soils. Moreover, change in the leachate phase, such as the pH drop (up to 1.5 unit) and/or the Fe concentration rise (up to 62 %), can be an early sign of the increased remobilization potential of metallic elements in amendment-treated remediation sites.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126246"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143822905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126250
Guohao Shao , Jun Dong , Weihong Zhang , Sifan Sun , Chenlu Li , Yan Li
Contamination of the subsurface environment poses a serious hazard to the environment and human health. Recently, the bioelectrochemical system (BES) has drawn great attention in soil and groundwater remediation as it does not necessitate the addition of chemicals and exhibits minimal energy consumption to facilitate microbial degradation of pollutants. However, the complexity of the subsurface environment and the design parameters of the BES significantly affect the remediation performance and the current literature on BES primarily concentrates on its application in wastewater treatment, with a lack of summary of that in the subsurface environment. Therefore, the purpose of this review was to provide the current status, challenges, and outlooks of BES in situ treatment of pollutants from soil and groundwater. Firstly, the principles and efficacies of BES in treating the typical pollutants from the subsurface environment were discussed. Secondly, the factors that impact the BES treatment efficiencies, especially soil properties, the distinctive and pivotal factors for BES in situ application, were discussed specifically. Finally, the challenges and outlooks of BES for the in situ remediation of the contaminated soil and groundwater were addressed. BES is a green and sustainable in situ remediation technology and future advancements may necessitate the integration with complementary technologies and innovative system configurations to advance the practical implementation of BES.
{"title":"In situ bioelectrochemical remediation of contaminated soil and groundwater: A review","authors":"Guohao Shao , Jun Dong , Weihong Zhang , Sifan Sun , Chenlu Li , Yan Li","doi":"10.1016/j.envpol.2025.126250","DOIUrl":"10.1016/j.envpol.2025.126250","url":null,"abstract":"<div><div>Contamination of the subsurface environment poses a serious hazard to the environment and human health. Recently, the bioelectrochemical system (BES) has drawn great attention in soil and groundwater remediation as it does not necessitate the addition of chemicals and exhibits minimal energy consumption to facilitate microbial degradation of pollutants. However, the complexity of the subsurface environment and the design parameters of the BES significantly affect the remediation performance and the current literature on BES primarily concentrates on its application in wastewater treatment, with a lack of summary of that in the subsurface environment. Therefore, the purpose of this review was to provide the current status, challenges, and outlooks of BES <em>in situ</em> treatment of pollutants from soil and groundwater. Firstly, the principles and efficacies of BES in treating the typical pollutants from the subsurface environment were discussed. Secondly, the factors that impact the BES treatment efficiencies, especially soil properties, the distinctive and pivotal factors for BES <em>in situ</em> application, were discussed specifically. Finally, the challenges and outlooks of BES for the <em>in situ</em> remediation of the contaminated soil and groundwater were addressed. BES is a green and sustainable <em>in situ</em> remediation technology and future advancements may necessitate the integration with complementary technologies and innovative system configurations to advance the practical implementation of BES.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126250"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126245
Ranran Zhang , Chenpan Gong , Yuze Gao , Yushui Chen , Liuyuan Zhou , Qian Lou , Yufei Zhao , Haifeng Zhuang , Jin Zhang , Shengdao Shan , Xiaolin Wang , Xun Qian , Liusheng Lei , Ming Hung Wong
Increasing attention has been given to the role of reductive soil disinfestation (RSD) on antibiotic resistance genes (ARGs) in soil. The selection of organic materials in RSD is crucial to the effectiveness of the RSD method. However, the effects of distinct organic materials on ARGs remains unclear. In this study, we selected straw and rapeseed meal as the organic materials in RSD and explored their effects on ARGs. The results showed that using straw significantly reduced the abundance of ARGs, high-risk ARGs, and mobile genetic elements (MGEs) by 31.5 %–65.8 %, while using rapeseed meal led to ARGs enrichment. Structural equation modeling (SEM) analysis identified MGEs and microbial communities as the primary drivers of ARGS changes under different organic materials. The abundance of MGEs was effectively controlled in straw treatments, reducing the potential for horizontal gene transfer of ARGs. Bacterial diversity was significantly lower in the straw treatments compared to the rapeseed meal treatments, potentially leading to a reduced abundance of ARGs host bacteria. Network co-occurrence analysis further revealed that Symbiobacteraceae and Bacillus were potential bacterial hosts of ARGs. In straw treatments, these genera’ abundance decreased by 12 %–100 % compared to the control (CK) and rapeseed meal groups, further inhibiting the spread of ARGs. These findings demonstrate that RSD with straw as the organic material is more effective in mitigating ARGs compared to rapeseed meal, providing insights into controlling soil antibiotic resistance risks and utilizing agricultural waste resources.
{"title":"Reducing antibiotic resistance genes in soil: The role of organic materials in reductive soil disinfestation","authors":"Ranran Zhang , Chenpan Gong , Yuze Gao , Yushui Chen , Liuyuan Zhou , Qian Lou , Yufei Zhao , Haifeng Zhuang , Jin Zhang , Shengdao Shan , Xiaolin Wang , Xun Qian , Liusheng Lei , Ming Hung Wong","doi":"10.1016/j.envpol.2025.126245","DOIUrl":"10.1016/j.envpol.2025.126245","url":null,"abstract":"<div><div>Increasing attention has been given to the role of reductive soil disinfestation (RSD) on antibiotic resistance genes (ARGs) in soil. The selection of organic materials in RSD is crucial to the effectiveness of the RSD method. However, the effects of distinct organic materials on ARGs remains unclear. In this study, we selected straw and rapeseed meal as the organic materials in RSD and explored their effects on ARGs. The results showed that using straw significantly reduced the abundance of ARGs, high-risk ARGs, and mobile genetic elements (MGEs) by 31.5 %–65.8 %, while using rapeseed meal led to ARGs enrichment. Structural equation modeling (SEM) analysis identified MGEs and microbial communities as the primary drivers of ARGS changes under different organic materials. The abundance of MGEs was effectively controlled in straw treatments, reducing the potential for horizontal gene transfer of ARGs. Bacterial diversity was significantly lower in the straw treatments compared to the rapeseed meal treatments, potentially leading to a reduced abundance of ARGs host bacteria. Network co-occurrence analysis further revealed that <em>Symbiobacteraceae</em> and <em>Bacillus</em> were potential bacterial hosts of ARGs. In straw treatments, these genera’ abundance decreased by 12 %–100 % compared to the control (CK) and rapeseed meal groups, further inhibiting the spread of ARGs. These findings demonstrate that RSD with straw as the organic material is more effective in mitigating ARGs compared to rapeseed meal, providing insights into controlling soil antibiotic resistance risks and utilizing agricultural waste resources.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126245"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126249
Zaiju Jiang, Lu Liao, Xuexian Li, Shaozhang Yang, Ling Li, Pan Wu
Antimony(Sb) in soil can be reintroduced into the environment through leaching processes driven by rainfall and surface runoff, raising concerns about secondary pollution. This study examined the release dynamics of Sb in carbonate-rich soils from an Sb smelting area in the karst region of southern China, aiming to elucidate the roles of pH, organic matter (OM), and geological conditions in Sb mobilization. The experiment was conducted under three different pH conditions (4.5, 6, and 7.5) and explores the influence of OM on the release behavior of Sb in the soil. Results indicated a characteristic release pattern for Sb in the soil solution, with an initial rapid increase, followed by a sharp decline, and a subsequent rise.The leaching rate of Sb was higher in weakly alkaline soil compared to acidic and weakly acidic soils.The removal of soil OM enhanced Sb release by 3.21-4.09 times, with a significant inhibition rate reaching 50.01-76.86%.The findings suggested Sb release kinetics followed a triphasic pattern consisting of rapid initial release, mid-term adsorption inhibition, and late-stage secondary release, which elucidated the underlying mechanisms of long-term leaching risks and provided a theoretical foundation for predicting contaminant dispersion. Soil OM effectively reduced Sb mobility through functional group complexation and soil aggregate formation, offering direct evidence for OM-based remediation strategies such as organic amendment applications. Neutral to weakly alkaline conditions (pH 6-7.5) significantly enhanced Sb release rates by promoting mineral desorption, indicating elevated contamination risks of Sb in karst region soils. This study emphasizes that priority should be given to increasing OM concentration and regulating pH buffering capacity to suppress Sb activity in karst areas, providing actionable scientific solutions for the remediation and management of Sb-contaminated sites.
{"title":"The release of antimony from soils surrounding the smelters in Karst Areas and its Environmental Implications","authors":"Zaiju Jiang, Lu Liao, Xuexian Li, Shaozhang Yang, Ling Li, Pan Wu","doi":"10.1016/j.envpol.2025.126249","DOIUrl":"https://doi.org/10.1016/j.envpol.2025.126249","url":null,"abstract":"Antimony(Sb) in soil can be reintroduced into the environment through leaching processes driven by rainfall and surface runoff, raising concerns about secondary pollution. This study examined the release dynamics of Sb in carbonate-rich soils from an Sb smelting area in the karst region of southern China, aiming to elucidate the roles of pH, organic matter (OM), and geological conditions in Sb mobilization. The experiment was conducted under three different pH conditions (4.5, 6, and 7.5) and explores the influence of OM on the release behavior of Sb in the soil. Results indicated a characteristic release pattern for Sb in the soil solution, with an initial rapid increase, followed by a sharp decline, and a subsequent rise.The leaching rate of Sb was higher in weakly alkaline soil compared to acidic and weakly acidic soils.The removal of soil OM enhanced Sb release by 3.21-4.09 times, with a significant inhibition rate reaching 50.01-76.86%.The findings suggested Sb release kinetics followed a triphasic pattern consisting of rapid initial release, mid-term adsorption inhibition, and late-stage secondary release, which elucidated the underlying mechanisms of long-term leaching risks and provided a theoretical foundation for predicting contaminant dispersion. Soil OM effectively reduced Sb mobility through functional group complexation and soil aggregate formation, offering direct evidence for OM-based remediation strategies such as organic amendment applications. Neutral to weakly alkaline conditions (pH 6-7.5) significantly enhanced Sb release rates by promoting mineral desorption, indicating elevated contamination risks of Sb in karst region soils. This study emphasizes that priority should be given to increasing OM concentration and regulating pH buffering capacity to suppress Sb activity in karst areas, providing actionable scientific solutions for the remediation and management of Sb-contaminated sites.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"5 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126248
João P. Santos , Javier Garcia-Calleja , Emmanuel Tessier , Séverine Le Faucheur , Zoyne Pedrero , David Amouroux , Vera I. Slaveykova
Phytoplankton are traditionally viewed as simple bioaccumulators and key entry points for mercury (Hg) into aquatic trophic chain. However the more recent findings suggest that they can function as dynamic biological systems capable of enhancing Hg cycling reactivity and altering its speciation. Nevertheless, the role of phytoplankton species in mercury transformations remains largely overlooked. The present study examined inorganic mercury (Hg(II)) methylation, monomethylmercury (MeHg) demethylation, and the production of dissolved gaseous mercury (Hg(0)) following exposure to sub-nanomolar concentrations Hg(II) or MeHg, representative of contaminated environments. Diatom Cyclotella meneghiniana was selected as a representative phytoplankton species due to its widespread presence in diverse aquatic ecosystems. To track transformation pathways, isotopically labeled Hg species were used to distinguish between methylation and demethylation processes. The results demonstrated rapid accumulation of both Hg(II) and MeHg in the diatom cells. A cellular demethylation of MeHg into Hg(II), primarily occurring within the cell debris fraction, but no detectable Hg(II) methylation was observed. The reduction of Hg(II) to Hg(0) was found to be biologically mediated and independent of the photosynthetic system. No significant production of Hg(0) after MeHg exposure was determined. Overall, these findings imply that phytoplankton species could actively contribute to mercury cycling in aquatic environments through cellular transformation processes, including MeHg demethylation and Hg(II) reduction.
{"title":"Transformations of aquatic mercury species by the diatom Cyclotella meneghiniana","authors":"João P. Santos , Javier Garcia-Calleja , Emmanuel Tessier , Séverine Le Faucheur , Zoyne Pedrero , David Amouroux , Vera I. Slaveykova","doi":"10.1016/j.envpol.2025.126248","DOIUrl":"10.1016/j.envpol.2025.126248","url":null,"abstract":"<div><div>Phytoplankton are traditionally viewed as simple bioaccumulators and key entry points for mercury (Hg) into aquatic trophic chain. However the more recent findings suggest that they can function as dynamic biological systems capable of enhancing Hg cycling reactivity and altering its speciation. Nevertheless, the role of phytoplankton species in mercury transformations remains largely overlooked. The present study examined inorganic mercury (Hg(II)) methylation, monomethylmercury (MeHg) demethylation, and the production of dissolved gaseous mercury (Hg(0)) following exposure to sub-nanomolar concentrations Hg(II) or MeHg, representative of contaminated environments. Diatom <em>Cyclotella meneghiniana</em> was selected as a representative phytoplankton species due to its widespread presence in diverse aquatic ecosystems. To track transformation pathways, isotopically labeled Hg species were used to distinguish between methylation and demethylation processes. The results demonstrated rapid accumulation of both Hg(II) and MeHg in the diatom cells. A cellular demethylation of MeHg into Hg(II), primarily occurring within the cell debris fraction, but no detectable Hg(II) methylation was observed. The reduction of Hg(II) to Hg(0) was found to be biologically mediated and independent of the photosynthetic system. No significant production of Hg(0) after MeHg exposure was determined. Overall, these findings imply that phytoplankton species could actively contribute to mercury cycling in aquatic environments through cellular transformation processes, including MeHg demethylation and Hg(II) reduction.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126248"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126225
Chuanjie Zheng , Xiangshun Zeng , Tianyao Wang , Jingjing Yang , Yini Ma , Xingcai Chen , Kaibo Huang
The pollution of Nandu River, a tropical island river, is causing widespread concern due to the rapid development of agriculture and tourism. This study investigates the occurrence of contaminants of emerging concern (CECs) in the Nandu River at multiple scales, including basin-wide, seasonal, and media-specific variations. Samples were analyzed using a non-targeted screening (NTS) method involving solid phase extraction (SPE), liquid chromatography (LC), and high-resolution mass spectrometry (HRMS). A total of 257 CECs were identified in the flatwater samples. They mainly comprised primarily consisting of pesticides, pharmaceuticals, and industrial materials, indicating the simultaneous development of agriculture, farming, and tourism in river basin. The 75 CECs were quantified, and hierarchical clustering revealed the 20 most frequently detected CECs were strongly correlated with the pollution levels. The 75 CECs were further classified into distinct source clusters based on detection rates, providing insights into pollutant characteristics across different river sections. Comparisons between pollutants in various media showed minimal flux exchange, attributed to the pollutants' nature and the hydrological and water quality characteristics of island rivers. Seasonal variations in pollutant concentrations revealed that 63 CECs were present year-round in the Nandu River, with eight exhibiting high detection frequencies (>60 %) at all sites. Based on the 63 CECs detected year-round, a priority list of 36 control pollutants was developed using Agency's Aquatic Toxicity Profiles (ATP). This study provides valuable information to natural resource and public health agencies on Hainan Island and similar tropical islands, supporting ecosystem conservation, fisheries management, and human health risk assessments.
{"title":"Non-target screening of emerging contaminants in tropical island rivers: A case study of the Nandu River","authors":"Chuanjie Zheng , Xiangshun Zeng , Tianyao Wang , Jingjing Yang , Yini Ma , Xingcai Chen , Kaibo Huang","doi":"10.1016/j.envpol.2025.126225","DOIUrl":"10.1016/j.envpol.2025.126225","url":null,"abstract":"<div><div>The pollution of Nandu River, a tropical island river, is causing widespread concern due to the rapid development of agriculture and tourism. This study investigates the occurrence of contaminants of emerging concern (CECs) in the Nandu River at multiple scales, including basin-wide, seasonal, and media-specific variations. Samples were analyzed using a non-targeted screening (NTS) method involving solid phase extraction (SPE), liquid chromatography (LC), and high-resolution mass spectrometry (HRMS). A total of 257 CECs were identified in the flatwater samples. They mainly comprised primarily consisting of pesticides, pharmaceuticals, and industrial materials, indicating the simultaneous development of agriculture, farming, and tourism in river basin. The 75 CECs were quantified, and hierarchical clustering revealed the 20 most frequently detected CECs were strongly correlated with the pollution levels. The 75 CECs were further classified into distinct source clusters based on detection rates, providing insights into pollutant characteristics across different river sections. Comparisons between pollutants in various media showed minimal flux exchange, attributed to the pollutants' nature and the hydrological and water quality characteristics of island rivers. Seasonal variations in pollutant concentrations revealed that 63 CECs were present year-round in the Nandu River, with eight exhibiting high detection frequencies (>60 %) at all sites. Based on the 63 CECs detected year-round, a priority list of 36 control pollutants was developed using Agency's Aquatic Toxicity Profiles (ATP). This study provides valuable information to natural resource and public health agencies on Hainan Island and similar tropical islands, supporting ecosystem conservation, fisheries management, and human health risk assessments.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126225"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-12DOI: 10.1016/j.envpol.2025.126247
Yu Yao , Peiyang Yang , Bin Wang , Qiao Xu , Fanhao Song , Yabo Wang , Yingdong Zhao , Lei Guo , Xiaozhi Wang , Meiling Xu
Biochar, produced from agricultural waste, provides a sustainable solution for effective waste management and soil remediation. The potential and mechanisms of biochar derived from primary agricultural sources (plant residues and animal manure) to mitigate the antibiotic resistance genes (ARGs) pollution in agricultural soil remain unexplored. To address this, a 60-day microcosm experiment was conducted, applying biochar derived from either corn straw (B1) or chicken manure (B2) to sulfamethazine and tetracycline-contaminated soil. The results demonstrated that B1 had richer functional groups than B2. B1 increased soil pH (+1.63 %) and total carbon (+24.56 %), but it decreased the abundance of norank_Vicinamibacteraceae (−35.71 %) and Haliangium (−42.11 %), and inhibited the dissemination of tetM and tetW by 57.76 % and 39.17 %, respectively. Comparatively, B2 significantly increased soil dissolved organic carbon (+161.66 %) and decreased the abundance of potential ARGs hosts (Acidibacter, −40.32 %), leading to reduced sul2 abundance (−33.47 %). Besides, B2 enhanced soil total nitrogen and bacterial diversity, and further reduced tetW abundance (−33.76 %). Overall, this study revealed divergent mechanisms and potential for mitigating soil ARGs transmission by biochar derived from corn straw and chicken manure. This study contributes to developing more effective strategies for managing ARGs in contaminated soil and mitigating their environmental risks.
{"title":"Divergent mitigation mechanisms of soil antibiotic resistance genes by biochar from different agricultural wastes","authors":"Yu Yao , Peiyang Yang , Bin Wang , Qiao Xu , Fanhao Song , Yabo Wang , Yingdong Zhao , Lei Guo , Xiaozhi Wang , Meiling Xu","doi":"10.1016/j.envpol.2025.126247","DOIUrl":"10.1016/j.envpol.2025.126247","url":null,"abstract":"<div><div>Biochar, produced from agricultural waste, provides a sustainable solution for effective waste management and soil remediation. The potential and mechanisms of biochar derived from primary agricultural sources (plant residues and animal manure) to mitigate the antibiotic resistance genes (ARGs) pollution in agricultural soil remain unexplored. To address this, a 60-day microcosm experiment was conducted, applying biochar derived from either corn straw (B1) or chicken manure (B2) to sulfamethazine and tetracycline-contaminated soil. The results demonstrated that B1 had richer functional groups than B2. B1 increased soil pH (+1.63 %) and total carbon (+24.56 %), but it decreased the abundance of <em>norank_Vicinamibacteraceae</em> (−35.71 %) and <em>Haliangium</em> (−42.11 %), and inhibited the dissemination of <em>tetM</em> and <em>tetW</em> by 57.76 % and 39.17 %, respectively. Comparatively, B2 significantly increased soil dissolved organic carbon (+161.66 %) and decreased the abundance of potential ARGs hosts (<em>Acidibacter</em>, −40.32 %), leading to reduced <em>sul2</em> abundance (−33.47 %). Besides, B2 enhanced soil total nitrogen and bacterial diversity, and further reduced <em>tetW</em> abundance (−33.76 %). Overall, this study revealed divergent mechanisms and potential for mitigating soil ARGs transmission by biochar derived from corn straw and chicken manure. This study contributes to developing more effective strategies for managing ARGs in contaminated soil and mitigating their environmental risks.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126247"},"PeriodicalIF":7.6,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-11DOI: 10.1016/j.envpol.2025.126242
Ping Ding , Jiayi Zhang , Xin Li , Pengcheng Ma , Guocheng Hu , Lijuan Zhang , Yunjiang Yu
The use of triclosan (TCS)-containing disinfectants has become increasingly prevalent in response to the COVID-19 pandemic, leading to a heightened presence of TCS in aquatic ecosystems. Thyroid hormones (THs), which are essential for numerous developmental and metabolic processes, are structurally similar to TCS, rendering it prone to exert endocrine-disrupting effects. In this study, we demonstrate that TCS can induce thyroid hormone disruption in zebrafish, with transgenerational consequences. Zebrafish embryos were exposed to environmentally relevant concentrations of TCS (0, 1, 3, and 10 μg/L) for 30, 60, and 180 days. TCS accumulated in zebrafish over an extended period, causing significant, dose-dependent alterations in TH levels. Furthermore, TCS significantly thereby interfered with the expression of thyroid axis-related genes in the P0-F1 generations. Molecular docking further confirmed that TCS induces transgenerational thyroid effects through potentially strong interactions with thyroglobulin (TG), interfering with the normal physiological function of THs. These findings suggest that TCS at environmentally relevant concentrations can exert ecologically harmful effects by disrupting THs. A rigorous ecological assessment of TCS is recommended before promoting or substituting antimicrobial agents in future disinfection products.
{"title":"Transgenerational thyroid hormone disruption in zebrafish induced by environmentally relevant concentrations of triclosan","authors":"Ping Ding , Jiayi Zhang , Xin Li , Pengcheng Ma , Guocheng Hu , Lijuan Zhang , Yunjiang Yu","doi":"10.1016/j.envpol.2025.126242","DOIUrl":"10.1016/j.envpol.2025.126242","url":null,"abstract":"<div><div>The use of triclosan (TCS)-containing disinfectants has become increasingly prevalent in response to the COVID-19 pandemic, leading to a heightened presence of TCS in aquatic ecosystems. Thyroid hormones (THs), which are essential for numerous developmental and metabolic processes, are structurally similar to TCS, rendering it prone to exert endocrine-disrupting effects. In this study, we demonstrate that TCS can induce thyroid hormone disruption in zebrafish, with transgenerational consequences. Zebrafish embryos were exposed to environmentally relevant concentrations of TCS (0, 1, 3, and 10 μg/L) for 30, 60, and 180 days. TCS accumulated in zebrafish over an extended period, causing significant, dose-dependent alterations in TH levels. Furthermore, TCS significantly thereby interfered with the expression of thyroid axis-related genes in the P0-F1 generations. Molecular docking further confirmed that TCS induces transgenerational thyroid effects through potentially strong interactions with thyroglobulin (TG), interfering with the normal physiological function of THs. These findings suggest that TCS at environmentally relevant concentrations can exert ecologically harmful effects by disrupting THs. A rigorous ecological assessment of TCS is recommended before promoting or substituting antimicrobial agents in future disinfection products.</div></div>","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"374 ","pages":"Article 126242"},"PeriodicalIF":7.6,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143819617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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