{"title":"微塑料对河流沉积物中菲的吸附和迁移影响的研究。","authors":"Simin Feng, Runfang Yao, Yuyun Chen, Hongli Zhang","doi":"10.1007/s10653-025-02584-9","DOIUrl":null,"url":null,"abstract":"<p><p>Microplastics (MPs) in ecosystems have garnered attention, yet their effects on the environmental behavior of organic pollutants in river sediments remain poorly understood. This study investigated how polyethylene (PE) and polyvinyl chloride (PVC) MPs influence the adsorption and migration of Phenanthrene (Phe) in sediments via batch and column experiments. Results revealed that sediment adsorption capacity for Phe followed: sediment containing 2% PE (120.27 μg g<sup>-1</sup>) > sediment without MPs (111.93 μg g<sup>-1</sup>) > sediment containing 2% PVC (104.79 μg g<sup>-1</sup>), attributed to PE's looser, more elastic structure with larger free volume compared to glassy PVC. Humic acid (HA) inhibited Phe adsorption by occupying sites and solubilizing all sediments. pH effects showed a non-linear trend due to MPs' zero-charge points, with adsorption increasing and decreasing as pH rose. Migration was influenced by Phe's initial concentration, MP type/proportion, and HA levels: higher initial Phe increased maximum penetration rate from 0.36 to 0.44, enhancing mobility, while migration ability ranked: sediment without MPs > sediment containing PE > sediment containing PVC. These findings highlight that PE increased phenanthrene adsorption by 26% compared to PVC, enhancing pollutant retention in sediments and posing risks to downstream ecosystems. Our study provides critical insights into the role of polymer properties and environmental factors in regulating contaminant behavior, advancing the understanding of MPs as vectors for hydrophobic organic pollutants in aquatic environments, and bridging the knowledge gap between microplastic interactions and organic pollutant behavior in river sediments.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 7","pages":"275"},"PeriodicalIF":3.2000,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Studies on the effect of microplastics on the adsorption and migration of Phenanthrene in river sediment.\",\"authors\":\"Simin Feng, Runfang Yao, Yuyun Chen, Hongli Zhang\",\"doi\":\"10.1007/s10653-025-02584-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Microplastics (MPs) in ecosystems have garnered attention, yet their effects on the environmental behavior of organic pollutants in river sediments remain poorly understood. This study investigated how polyethylene (PE) and polyvinyl chloride (PVC) MPs influence the adsorption and migration of Phenanthrene (Phe) in sediments via batch and column experiments. Results revealed that sediment adsorption capacity for Phe followed: sediment containing 2% PE (120.27 μg g<sup>-1</sup>) > sediment without MPs (111.93 μg g<sup>-1</sup>) > sediment containing 2% PVC (104.79 μg g<sup>-1</sup>), attributed to PE's looser, more elastic structure with larger free volume compared to glassy PVC. Humic acid (HA) inhibited Phe adsorption by occupying sites and solubilizing all sediments. pH effects showed a non-linear trend due to MPs' zero-charge points, with adsorption increasing and decreasing as pH rose. Migration was influenced by Phe's initial concentration, MP type/proportion, and HA levels: higher initial Phe increased maximum penetration rate from 0.36 to 0.44, enhancing mobility, while migration ability ranked: sediment without MPs > sediment containing PE > sediment containing PVC. These findings highlight that PE increased phenanthrene adsorption by 26% compared to PVC, enhancing pollutant retention in sediments and posing risks to downstream ecosystems. Our study provides critical insights into the role of polymer properties and environmental factors in regulating contaminant behavior, advancing the understanding of MPs as vectors for hydrophobic organic pollutants in aquatic environments, and bridging the knowledge gap between microplastic interactions and organic pollutant behavior in river sediments.</p>\",\"PeriodicalId\":11759,\"journal\":{\"name\":\"Environmental Geochemistry and Health\",\"volume\":\"47 7\",\"pages\":\"275\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-06-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Geochemistry and Health\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1007/s10653-025-02584-9\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Geochemistry and Health","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s10653-025-02584-9","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Studies on the effect of microplastics on the adsorption and migration of Phenanthrene in river sediment.
Microplastics (MPs) in ecosystems have garnered attention, yet their effects on the environmental behavior of organic pollutants in river sediments remain poorly understood. This study investigated how polyethylene (PE) and polyvinyl chloride (PVC) MPs influence the adsorption and migration of Phenanthrene (Phe) in sediments via batch and column experiments. Results revealed that sediment adsorption capacity for Phe followed: sediment containing 2% PE (120.27 μg g-1) > sediment without MPs (111.93 μg g-1) > sediment containing 2% PVC (104.79 μg g-1), attributed to PE's looser, more elastic structure with larger free volume compared to glassy PVC. Humic acid (HA) inhibited Phe adsorption by occupying sites and solubilizing all sediments. pH effects showed a non-linear trend due to MPs' zero-charge points, with adsorption increasing and decreasing as pH rose. Migration was influenced by Phe's initial concentration, MP type/proportion, and HA levels: higher initial Phe increased maximum penetration rate from 0.36 to 0.44, enhancing mobility, while migration ability ranked: sediment without MPs > sediment containing PE > sediment containing PVC. These findings highlight that PE increased phenanthrene adsorption by 26% compared to PVC, enhancing pollutant retention in sediments and posing risks to downstream ecosystems. Our study provides critical insights into the role of polymer properties and environmental factors in regulating contaminant behavior, advancing the understanding of MPs as vectors for hydrophobic organic pollutants in aquatic environments, and bridging the knowledge gap between microplastic interactions and organic pollutant behavior in river sediments.
期刊介绍：
Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people.
Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes.
The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.
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