Perfluoroalkyl and polyfluoroalkyl substances in sediments from South Bohai coastal watersheds,China |
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| Authors: | Zhaoyun Zhu Tieyu Wang Pei Wang Yonglong Lu John P Giesy |
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| Institution: | 1. State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;3. Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada |
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| Abstract: | This study investigated the concentrations and distribution of Perfluoroalkyl and polyfluoroalkyl substances (PFAS) in sediments of 12 rivers from South Bohai coastal watersheds. The highest concentrations of ΣPFAS (31.920 ng g−1 dw) and PFOA (29.021 ng g−1 dw) were found in sediments from the Xiaoqing River, which was indicative of local point sources in this region. As for other rivers, concentrations of ΣPFAS ranged from 0.218 to 1.583 ng g−1 dw were found in the coastal sediments and from 0.167 to 1.953 ng g−1 dw in the riverine sediments. Predominant PFAS from coastal and riverine areas were PFOA and PFBS, with percentages of 30% and 35%, respectively. Partitioning analysis showed the concentrations of PFNA, PFDA and PFHxS were significantly correlated with organic carbon. The results of a preliminary environmental hazard assessment showed that PFOS posed the highest hazard in the Mi River, while PFOA posed a relative higher hazard in the Xiaoqing River. |
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| Keywords: | PFAS Sediment Partitioning Hazard assessment South Bohai |
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