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A novel passive sampling and sequential extraction approach to investigate desorption kinetics of emerging organic contaminants at the sediment-water interface.
Ji, Xiaowen; Challis, Jonathan K; Cantin, Jenna; Cardenas Perez, Ana S; Gong, Yufeng; Giesy, John P; Brinkmann, Markus.
Afiliação
  • Ji X; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Canada.
  • Challis JK; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada.
  • Cantin J; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada.
  • Cardenas Perez AS; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada.
  • Gong Y; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada.
  • Giesy JP; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada; Department of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, Canada; Department of Environmental Sciences, Baylor University, Waco, Texas, USA.
  • Brinkmann M; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Canada; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada; Centre for Hydrology, University of Saskatchewan, Saskatoon,
Water Res ; 217: 118455, 2022 Jun 15.
Article em En | MEDLINE | ID: mdl-35452970
Forms of organic contaminants is an important driver of bioavailable fraction and desorption kinetics of pollutants binding to sediments. To determine fluxes and resupply of nine environmentally-relevant antipsychotic drugs, which are emerging pollutants that can have adverse effects on aquatic organisms, interface passive samplers of diffusive gradients in thin films (DGT) were deployed for 21 days, in situ at the sediment-water interface in submerged sandy riverbank sediments. At each deployment time, samples of sediment were collected and subjected to consecutive extraction of pore water, as well as rapidly-desorbing (labile), stable-desorbing, and bound residue fractions. Concentrations of antipsychotic drugs decreased with sediment depth with the greatest concentrations observed in the top 2 cm. Positive fluxes of antipsychotic drugs were observed from sediment to surface water. The dynamic fraction transfer model indicated that the labile fraction can be resupplied with a lag time (> 21 d). When results were further interpreted using the DGT-induced fluxes in soils and sediments (DIFS) model, partial resupply of antipsychotic drugs from sediment particles to porewater was demonstrated. Desorption occurred within the entirety of the observed 15 cm depth of sediment. Fastest rates of resupply were found for carbamazepine and lamotrigine. Size of the labile pool estimated by the DIFS model did not fully explain the observed resupply, while a first-order three-compartment kinetic model for the fast-desorbing fraction can be used to supplement DIFS predictions with estimations of labile pool size.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Antipsicóticos / Poluentes Químicos da Água Tipo de estudo: Prognostic_studies Idioma: En Revista: Water Res Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Canadá País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Antipsicóticos / Poluentes Químicos da Água Tipo de estudo: Prognostic_studies Idioma: En Revista: Water Res Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Canadá País de publicação: Reino Unido