{"title":"Assessing the impacts of sodium polyacrylate discharge into the Seine River: A numerical modeling approach.","authors":"Mohamed Bey-Zekkoub, Pablo Tassi, Norinda Chhim","doi":"10.1016/j.jconhyd.2025.104740","DOIUrl":null,"url":null,"abstract":"<p><p>By using a numerical modeling approach, this study investigates sodium polyacrylate's environmental fate upon discharge into the Seine River, examining its adsorption to suspended sediments, water column transport, and bed sediment accumulation. Utilizing laboratory experiments and numerical modeling, the research evaluated polymer transport dynamics and accumulation patterns relative to environmental toxicity thresholds. While high dilution minimized aquatic organism impacts, bed sediment accumulation potentially threatened soil species like plants and earthworms. Discharging the polymer in adsorbed form reduced aquatic exposure but increased sediment accumulation. Post-discharge, sediment properties and flow conditions significantly influenced polymer immobilization, with low flow and bed resistance prolonging the remobilization process.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"276 ","pages":"104740"},"PeriodicalIF":4.4000,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of contaminant hydrology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jconhyd.2025.104740","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
By using a numerical modeling approach, this study investigates sodium polyacrylate's environmental fate upon discharge into the Seine River, examining its adsorption to suspended sediments, water column transport, and bed sediment accumulation. Utilizing laboratory experiments and numerical modeling, the research evaluated polymer transport dynamics and accumulation patterns relative to environmental toxicity thresholds. While high dilution minimized aquatic organism impacts, bed sediment accumulation potentially threatened soil species like plants and earthworms. Discharging the polymer in adsorbed form reduced aquatic exposure but increased sediment accumulation. Post-discharge, sediment properties and flow conditions significantly influenced polymer immobilization, with low flow and bed resistance prolonging the remobilization process.
期刊介绍：
The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide).
The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.
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