Pub Date : 2026-02-09DOI: 10.1016/j.envpol.2026.127795
Silvia Royano, Juan Escobar-Arnanz, Irene Navarro, Adrián de la Torre, María Ángeles Martínez
Pharmaceutically active compounds (PhACs) are recognized as important emerging pollutants in aquatic environments. Despite growing concern, an increasing number of new pharmaceuticals are being authorized each year, reaching the environment and compromising the quality and health of ecosystems. However, comprehensive multi-matrix investigations integrating water, sediments, biota, and wastewater systems remain scarce. In this study, a comprehensive HRMS-based suspect screening workflow was implemented using ultra-high performance liquid chromatography coupled with high-resolution mass spectrometry (UPLC-HRMS). Through a multi-compartment approach involving water (n=89), sediments (n=28), fish (n=24), wastewater (n=16), and sewage sludge (n=16) matrices collected during 2020-2022, this study identified 153 PhACs (136 active ingredients and 17 metabolites or transformation products). Cardiovascular, psychotropic, pain management, and other nervous system drugs were the dominant therapeutic families, accounting for 63% of all identifications. Surface water contained the highest number of compounds (122), followed by effluents (85). Although influents presented fewer compounds, they showed significantly higher total input (p < 0.05). Solid matrices such as sediments and sludge accumulated highly hydrophobic substances (e.g., telmisartan, citalopram), whereas aqueous matrices contained more polar compounds (e.g., tramadol) and metabolites. Fish exhibited the lowest number of PhACs (11). Regarding spatial distribution, sites more strongly influenced by human activities displayed higher (p < 0.05) normalized areas and number of compounds. Overall, this study provides one of the most comprehensive multi matrix suspect screening assessments of PhACs to date. The holistic evaluation of the riverine ecosystem highlights the value of HRMS based workflows for identifying and prioritizing emerging contaminants, supporting the development of regulatory strategies to control pharmaceutical pollution and enabling early detection of newly marketed drugs.
{"title":"Pharmaceutical footprint in the river ecosystem: suspect screening approach with high resolution mass spectrometry","authors":"Silvia Royano, Juan Escobar-Arnanz, Irene Navarro, Adrián de la Torre, María Ángeles Martínez","doi":"10.1016/j.envpol.2026.127795","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127795","url":null,"abstract":"Pharmaceutically active compounds (PhACs) are recognized as important emerging pollutants in aquatic environments. Despite growing concern, an increasing number of new pharmaceuticals are being authorized each year, reaching the environment and compromising the quality and health of ecosystems. However, comprehensive multi-matrix investigations integrating water, sediments, biota, and wastewater systems remain scarce. In this study, a comprehensive HRMS-based suspect screening workflow was implemented using ultra-high performance liquid chromatography coupled with high-resolution mass spectrometry (UPLC-HRMS). Through a multi-compartment approach involving water (n=89), sediments (n=28), fish (n=24), wastewater (n=16), and sewage sludge (n=16) matrices collected during 2020-2022, this study identified 153 PhACs (136 active ingredients and 17 metabolites or transformation products). Cardiovascular, psychotropic, pain management, and other nervous system drugs were the dominant therapeutic families, accounting for 63% of all identifications. Surface water contained the highest number of compounds (122), followed by effluents (85). Although influents presented fewer compounds, they showed significantly higher total input (p < 0.05). Solid matrices such as sediments and sludge accumulated highly hydrophobic substances (e.g., telmisartan, citalopram), whereas aqueous matrices contained more polar compounds (e.g., tramadol) and metabolites. Fish exhibited the lowest number of PhACs (11). Regarding spatial distribution, sites more strongly influenced by human activities displayed higher (p < 0.05) normalized areas and number of compounds. Overall, this study provides one of the most comprehensive multi matrix suspect screening assessments of PhACs to date. The holistic evaluation of the riverine ecosystem highlights the value of HRMS based workflows for identifying and prioritizing emerging contaminants, supporting the development of regulatory strategies to control pharmaceutical pollution and enabling early detection of newly marketed drugs.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"31 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146586","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}
The increasing consumption of plastic in our society has led to the dissemination of microplastics in the environment, which, by diffusing into the food chain and across terrestrial compartments, results in human exposure to a wide diversity of particulate plastics. This study aimed to elucidate the impact of a realistic mixture of microplastics on the colon. Environmental samples composed of the four predominant polymers were cryoground. Irregularly shaped micro-fragments of polypropylene, polyethylene terephthalate, polystyrene, and polyethylene (45–100 μm) were mixed and incorporated into the mouse diet at three doses (5, 50, and 500 μg/g) to reproduce the proportions found in human stool. A 30-day exposure to the microplastic mixture induced dose-dependent alterations of the colonic transcriptome, with downregulation of heat-shock proteins. T-cell activation and cytokine-cytokine receptor interaction signaling pathways were dysregulated at all three doses. This was accompanied by immune dysfunction in the mesenteric lymph nodes. A 30-day exposure worsened the development of colonic inflammation in the DSS-induced colitis model, with increases in the colon weight-to-size ratio, myeloperoxidase activity, and cytokines transcript levels at the medium dose. A 75-day exposure exacerbated tumorigenesis in the AOM/DSS-induced colorectal cancer model at the high dose, as evidenced by worse endoscopic, macroscopic, and histologic scores of tumorigenesis, and increased Cyclin D1 and MYC protein expression. In mice, oral exposure to an environmentally sourced microplastic mixture that reproduces the size, shape, polymer types, and relative proportions of microplastics detected in human stool leads to colonic transcriptomic dysregulation and increased susceptibility to inflammation and tumorigenesis.
{"title":"Ingestion of a human-relevant mixture of environmentally sourced microplastics promotes inflammation and tumorigenesis in the mouse colon.","authors":"Madjid DJOUINA, Muriel PICHAVANT, Christophe WAXIN, Alexandre DEHAUT, Suzie LOISON, Emeline DRIENCOURT, Amélie DEBORGHER, Capucine BALESDENT, David LAUNAY, Laurent DUBUQUOY, Guillaume DUFLOS, Mathilde BODY-MALAPEL","doi":"10.1016/j.envpol.2026.127794","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127794","url":null,"abstract":"The increasing consumption of plastic in our society has led to the dissemination of microplastics in the environment, which, by diffusing into the food chain and across terrestrial compartments, results in human exposure to a wide diversity of particulate plastics. This study aimed to elucidate the impact of a realistic mixture of microplastics on the colon. Environmental samples composed of the four predominant polymers were cryoground. Irregularly shaped micro-fragments of polypropylene, polyethylene terephthalate, polystyrene, and polyethylene (45–100 μm) were mixed and incorporated into the mouse diet at three doses (5, 50, and 500 μg/g) to reproduce the proportions found in human stool. A 30-day exposure to the microplastic mixture induced dose-dependent alterations of the colonic transcriptome, with downregulation of heat-shock proteins. T-cell activation and cytokine-cytokine receptor interaction signaling pathways were dysregulated at all three doses. This was accompanied by immune dysfunction in the mesenteric lymph nodes. A 30-day exposure worsened the development of colonic inflammation in the DSS-induced colitis model, with increases in the colon weight-to-size ratio, myeloperoxidase activity, and cytokines transcript levels at the medium dose. A 75-day exposure exacerbated tumorigenesis in the AOM/DSS-induced colorectal cancer model at the high dose, as evidenced by worse endoscopic, macroscopic, and histologic scores of tumorigenesis, and increased Cyclin D1 and MYC protein expression. In mice, oral exposure to an environmentally sourced microplastic mixture that reproduces the size, shape, polymer types, and relative proportions of microplastics detected in human stool leads to colonic transcriptomic dysregulation and increased susceptibility to inflammation and tumorigenesis.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"315 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146634","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 : 2026-02-08DOI: 10.1016/j.envpol.2026.127776
Shuo Zhang, Lijia Qu, Xintong Li, Ye Lu, Yang Cui, Jianwei Dong, Hui Xie
Muddy and sandy coastlines account for approximately 45% of the world's ice-free coastlines, facing significant ecological risks from antibiotic pollution due to overuse. This study elucidates how fundamental differences in sediment composition govern the distinct transport and fate of antibiotics in these contrasting coastal systems. Muddy coasts primarily consisted of fine-grained sediments with higher water contents, whereas sandy coasts are characterized by coarse-grained sand and gravel with better water permeability. Porewater acts as a bridge between overlying water and sediment, playing a crucial role in contaminant transport. This study compared the antibiotic pollution patterns and revealed the regulatory mechanisms of coastal sediment on the antibiotic source - sink processes. Results showed that antibiotic concentrations in the porewater of mangroves (18.4-182 ng/L) were significantly higher than those (13.3-30.4 ng/L) in sandy beaches. However, higher proportions of tetracyclines in sandy sediment than muddy sediment were found. Spatially, the lowest antibiotic concentrations within the mangrove ecosystem occurred in natural areas. Source analysis indicated that antibiotics in mangroves were predominantly derived from localized sewage and wastewater, whereas in sandy beaches, they were primarily attributed to non-point sources via rainfall runoff and tidal forcing. Our findings revealed that sediment properties govern the spatial distribution and ecological risks of antibiotics in coastal zones. The contrasting retention capacities of muddy and sandy coasts dictate divergent ecological risk patterns. An accurate assessment of the environmental risks posed by antibiotics must account for their specific behavior in water-sediment systems. Consequently, management for muddy coasts should emphasize source control, while for sandy coasts, priority should be given to intercepting transport pathways.
{"title":"Contrast antibiotic activities from muddy and sandy coasts and their potential controls","authors":"Shuo Zhang, Lijia Qu, Xintong Li, Ye Lu, Yang Cui, Jianwei Dong, Hui Xie","doi":"10.1016/j.envpol.2026.127776","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127776","url":null,"abstract":"Muddy and sandy coastlines account for approximately 45% of the world's ice-free coastlines, facing significant ecological risks from antibiotic pollution due to overuse. This study elucidates how fundamental differences in sediment composition govern the distinct transport and fate of antibiotics in these contrasting coastal systems. Muddy coasts primarily consisted of fine-grained sediments with higher water contents, whereas sandy coasts are characterized by coarse-grained sand and gravel with better water permeability. Porewater acts as a bridge between overlying water and sediment, playing a crucial role in contaminant transport. This study compared the antibiotic pollution patterns and revealed the regulatory mechanisms of coastal sediment on the antibiotic source - sink processes. Results showed that antibiotic concentrations in the porewater of mangroves (18.4-182 ng/L) were significantly higher than those (13.3-30.4 ng/L) in sandy beaches. However, higher proportions of tetracyclines in sandy sediment than muddy sediment were found. Spatially, the lowest antibiotic concentrations within the mangrove ecosystem occurred in natural areas. Source analysis indicated that antibiotics in mangroves were predominantly derived from localized sewage and wastewater, whereas in sandy beaches, they were primarily attributed to non-point sources via rainfall runoff and tidal forcing. Our findings revealed that sediment properties govern the spatial distribution and ecological risks of antibiotics in coastal zones. The contrasting retention capacities of muddy and sandy coasts dictate divergent ecological risk patterns. An accurate assessment of the environmental risks posed by antibiotics must account for their specific behavior in water-sediment systems. Consequently, management for muddy coasts should emphasize source control, while for sandy coasts, priority should be given to intercepting transport pathways.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"199 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138702","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}
{"title":"Hexafluoropropylene oxide trimer acid is an unsafe substitute to perfluorooctanoic acid: the perspectives of intestinal microflora and hepatotoxicity in frog","authors":"Xindi Ye, Wei Cai, Xin Zheng, Sihan Zhang, Wanze Ouyang, Zhiquan Liu, Hangjun Zhang","doi":"10.1016/j.envpol.2026.127782","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127782","url":null,"abstract":"","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"25 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134214","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 : 2026-02-07DOI: 10.1016/j.envpol.2026.127783
Jodie Buytaert, Marcel Eens, Lieven Bervoets, Oliver Salangad, Adrian Covaci, Thimo Groffen
{"title":"PFAS concentrations and compositional profiles in great tit (Parus major) feathers, faecal samples and blood plasma: Implications for non-invasive monitoring","authors":"Jodie Buytaert, Marcel Eens, Lieven Bervoets, Oliver Salangad, Adrian Covaci, Thimo Groffen","doi":"10.1016/j.envpol.2026.127783","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127783","url":null,"abstract":"","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"9 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134217","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 : 2026-02-07DOI: 10.1016/j.envpol.2026.127780
Lingxu Kong, Xinlu Miao, Xiaoxuan Qiu, Hao Wei, Xiaojie Xu, Bo Tan, Qian Sun, Hui Gao, Tao Xia, Shun Zhang
{"title":"Organic phosphate flame retardants exposure and neuroaxonal injury in adults: a systematic study integrating human data and network toxicology","authors":"Lingxu Kong, Xinlu Miao, Xiaoxuan Qiu, Hao Wei, Xiaojie Xu, Bo Tan, Qian Sun, Hui Gao, Tao Xia, Shun Zhang","doi":"10.1016/j.envpol.2026.127780","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127780","url":null,"abstract":"","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"91 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134213","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 : 2026-02-07DOI: 10.1016/j.envpol.2026.127769
Olga Novillo-Sanjuan, Shannen Thora Lea Sait, Junjie Zhang, Susana V. Gonzalez, Juan Antonio Raga, Jesús Tomás Aguirre, Alexandros G. Asimakopoulos
{"title":"PFAS exposure of juvenile loggerhead turtles (Caretta caretta) from the Western Mediterranean Sea to 36 PFAS and its association with oxidative stress.","authors":"Olga Novillo-Sanjuan, Shannen Thora Lea Sait, Junjie Zhang, Susana V. Gonzalez, Juan Antonio Raga, Jesús Tomás Aguirre, Alexandros G. Asimakopoulos","doi":"10.1016/j.envpol.2026.127769","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127769","url":null,"abstract":"","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"19 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134218","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 : 2026-02-07DOI: 10.1016/j.envpol.2026.127785
S. Devliegere, T. Goessens, S. De Baere, E. Blomme, A. Barbi, E. Meers, L. Vanhaecke, P. Spanoghe, A. Martel, F. Batsleer, D. Bonte, F. Pasmans, S. Croubels
The European common toad (Bufo bufo) is undergoing widespread population declines, potentially influenced by multiple environmental stressors, including chemical pollution. This study aimed to link the toad population status and contaminant levels in 20 breeding ponds in Flanders (Belgium). A multi-contaminant analytical approach was applied, using solid-phase extraction (SPE) combined with advanced instrumental methods: ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC–MS/MS) for pesticides and mycotoxins, UHPLC-Orbitrap-high resolution MS for pharmaceuticals, inductively coupled plasma-optical emission spectrometry (ICP-OES) and ICP-MS for high and low-concentrated metals, respectively, and ion chromatography (IC) for nutrients. Across ponds, 25 pesticides, 11 mycotoxins, 13 antimicrobial drugs, 5 antiparasitic drugs, and 11 metals were detected, reaching concentrations up to 114 ng/L (pesticides), 88.2 ng/L (mycotoxins), 837 ng/L (antimicrobials), 26.8 ng/L (antiparasitic drugs), and 7382 μg/L (metals). Temporal variability was pronounced, with episodic increases in pesticide and metal levels, declining nitrate and sulphate concentrations, and increasing enniatin levels from March to June. Despite frequent co-contamination, no direct relationship was observed between individual contaminant levels and toad population status. These findings suggest that population declines are unlikely to be driven by a single substance, but rather by combined pressures associated with complex contaminant mixtures and other environmental stressors.
{"title":"Characterization of Complex Environmental Contaminant Mixtures in Common Toad Breeding Ponds in Flanders, Belgium","authors":"S. Devliegere, T. Goessens, S. De Baere, E. Blomme, A. Barbi, E. Meers, L. Vanhaecke, P. Spanoghe, A. Martel, F. Batsleer, D. Bonte, F. Pasmans, S. Croubels","doi":"10.1016/j.envpol.2026.127785","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127785","url":null,"abstract":"The European common toad (<em>Bufo bufo</em>) is undergoing widespread population declines, potentially influenced by multiple environmental stressors, including chemical pollution. This study aimed to link the toad population status and contaminant levels in 20 breeding ponds in Flanders (Belgium). A multi-contaminant analytical approach was applied, using solid-phase extraction (SPE) combined with advanced instrumental methods: ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC–MS/MS) for pesticides and mycotoxins, UHPLC-Orbitrap-high resolution MS for pharmaceuticals, inductively coupled plasma-optical emission spectrometry (ICP-OES) and ICP-MS for high and low-concentrated metals, respectively, and ion chromatography (IC) for nutrients. Across ponds, 25 pesticides, 11 mycotoxins, 13 antimicrobial drugs, 5 antiparasitic drugs, and 11 metals were detected, reaching concentrations up to 114 ng/L (pesticides), 88.2 ng/L (mycotoxins), 837 ng/L (antimicrobials), 26.8 ng/L (antiparasitic drugs), and 7382 μg/L (metals). Temporal variability was pronounced, with episodic increases in pesticide and metal levels, declining nitrate and sulphate concentrations, and increasing enniatin levels from March to June. Despite frequent co-contamination, no direct relationship was observed between individual contaminant levels and toad population status. These findings suggest that population declines are unlikely to be driven by a single substance, but rather by combined pressures associated with complex contaminant mixtures and other environmental stressors.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"293 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129677","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 : 2026-02-07DOI: 10.1016/j.envpol.2026.127781
Weiming Feng, Gongwei Xu, Xinru Zhai, Libing Zheng, Helian Li
The coexistence of microplastics (MPs) and heavy metals in agricultural soils leads to complex interactions during their adsorption and migration processes. Understanding their fate under realistic soil conditions is crucial for assessing the associated environmental risks. Therefore, virgin and aged polyethylene (PE) and polylactic acid (PLA) MPs were used to investigate their influence on the adsorption and migration of chromium (Cr) in unsaturated steady-state soils via batch and column experiments. Batch experiments revealed that soil adsorbed less Cr(VI) than Cr(III) (0.44 vs. 1.45 mg/g). The addition of MPs inhibited Cr adsorption (specifically, 0.40 and 1.23 mg/g for Cr(VI) and Cr(III), respectively, at 7% MP addition), with adsorption capacity decreasing as MP dosage increased. Column experiments showed Cr(VI) reached adsorption equilibrium faster than Cr(III) (25 vs. 41 pore volumes); its migration was primarily controlled by soil hydraulic conditions, and MPs exerted an inhibitory effect. In contrast, Cr(III) migration was predominantly governed by adsorption, and MP addition promoted its migration. Regarding the MPs themselves, PE exhibits greater migration capacity, which decreased with aging, whereas PLA showed the opposite trend. Interestingly, the presence of Cr(III) reduces the migration of MPs compared to Cr(VI). These findings clarify the effects and mechanisms of MPs on Cr migration under realistic soil conditions, and enhance the understanding of migration dynamics and environmental fate of coexisting pollutants.
微塑料与重金属在农业土壤中的共存，导致它们在吸附和迁移过程中发生复杂的相互作用。了解它们在现实土壤条件下的命运对于评估相关的环境风险至关重要。因此，采用未加工聚乙烯（PE）和陈化聚乙烯（PLA） MPs，通过批量和柱状实验研究了它们对非饱和稳态土壤中铬（Cr）的吸附和迁移的影响。批量试验结果表明，土壤对Cr（VI）的吸附量小于Cr(III) （0.44 vs. 1.45 mg/g）。MP的加入抑制了Cr的吸附（在MP添加量为7%时，Cr（VI）和Cr（III）的吸附量分别为0.40和1.23 mg/g），吸附量随MP添加量的增加而降低。柱实验表明，Cr（VI）比Cr（III）更快达到吸附平衡（25比41孔体积）；其迁移主要受土壤水力条件控制，MPs具有抑制作用。相反，Cr（III）的迁移主要受吸附控制，MP的加入促进了其迁移。就MPs本身而言，PE表现出更大的迁移能力，随着年龄的增长而下降，而PLA表现出相反的趋势。有趣的是，与Cr（VI）相比，Cr（III）的存在减少了MPs的迁移。这些发现阐明了实际土壤条件下MPs对Cr迁移的影响及其机制，增强了对共存污染物迁移动力学和环境命运的认识。
{"title":"Polyethylene and polylactic acid microplastics affect the migration of Cr(VI) and Cr(III) in acidic clay soil via distinct mechanisms","authors":"Weiming Feng, Gongwei Xu, Xinru Zhai, Libing Zheng, Helian Li","doi":"10.1016/j.envpol.2026.127781","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127781","url":null,"abstract":"The coexistence of microplastics (MPs) and heavy metals in agricultural soils leads to complex interactions during their adsorption and migration processes. Understanding their fate under realistic soil conditions is crucial for assessing the associated environmental risks. Therefore, virgin and aged polyethylene (PE) and polylactic acid (PLA) MPs were used to investigate their influence on the adsorption and migration of chromium (Cr) in unsaturated steady-state soils via batch and column experiments. Batch experiments revealed that soil adsorbed less Cr(VI) than Cr(III) (0.44 vs. 1.45 mg/g). The addition of MPs inhibited Cr adsorption (specifically, 0.40 and 1.23 mg/g for Cr(VI) and Cr(III), respectively, at 7% MP addition), with adsorption capacity decreasing as MP dosage increased. Column experiments showed Cr(VI) reached adsorption equilibrium faster than Cr(III) (25 vs. 41 pore volumes); its migration was primarily controlled by soil hydraulic conditions, and MPs exerted an inhibitory effect. In contrast, Cr(III) migration was predominantly governed by adsorption, and MP addition promoted its migration. Regarding the MPs themselves, PE exhibits greater migration capacity, which decreased with aging, whereas PLA showed the opposite trend. Interestingly, the presence of Cr(III) reduces the migration of MPs compared to Cr(VI). These findings clarify the effects and mechanisms of MPs on Cr migration under realistic soil conditions, and enhance the understanding of migration dynamics and environmental fate of coexisting pollutants.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"235 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129678","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：