Geochemical fractionation, bioavailability, and potential risk of heavy metals in sediments of the largest influent river into Chaohu Lake, China
文献类型：期刊论文
| 作者 | Liu, Bingxiang; Luo, Jun; Jiang, Shuo; Wang, Yan; Li, Yucheng; Zhang, Xuesheng; Zhou, Shaoqi |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2021 |
| 卷号 | 290 |
| 英文摘要 | As the largest tributary flowing into Chaohu Lake, China, the Hangbu-Fengle River (HFR) has an important impact on the aquatic environment security of the lake. However, existing information on the potential risks of heavy metals (HMs) in HFR sediments was insufficient due to the lack of bioavailability data on HMs. Hence, geochemical fractionation, bioavailability, and potential risk of five HMs (Cr, Cu, Zn, Cd, and Pb) in HFR sediments were investigated by the combined use of the diffusive gradient in thin-films (DGT), sequential extraction (BCR), as well as the physiologically based extraction test (PBET). The average contents of Cd and Zn in the HFR Basin were more than the background values in the sediments of Chaohu Lake. A large percentage of BCR-extracted exchangeable fraction was found in Cd (8.69%), Zn (8.12%), and Cu (8.05%), suggesting higher bioavailability. The PBET-extracted fractions of five HMs were all almost closely positively correlated with their BCR-extracted forms. The pH was an important factor affecting the bioavailability of HMs. The average DGT-measured contents of Zn, Cd, Cr, Cu, and Pb were 28.07, 7.7, 3.69, 2.26, 0.5 mu g/L, respectively. Only DGT-measured Cd significantly negatively correlated with Eh, indicating that Cd also had a high release risk under reducing conditions, similar to the risk assessment results. Our results could provide a reference for evaluating the potential bioavailabilities and ecological hazards of HMs in similar study areas. |
| 源URL | [http://159.226.73.51/handle/332005/20315]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Liu, Bingxiang,Luo, Jun,Jiang, Shuo,et al. Geochemical fractionation, bioavailability, and potential risk of heavy metals in sediments of the largest influent river into Chaohu Lake, China[J]. ENVIRONMENTAL POLLUTION,2021,290. |
| APA | Liu, Bingxiang.,Luo, Jun.,Jiang, Shuo.,Wang, Yan.,Li, Yucheng.,...&Zhou, Shaoqi.(2021).Geochemical fractionation, bioavailability, and potential risk of heavy metals in sediments of the largest influent river into Chaohu Lake, China.ENVIRONMENTAL POLLUTION,290. |
| MLA | Liu, Bingxiang,et al."Geochemical fractionation, bioavailability, and potential risk of heavy metals in sediments of the largest influent river into Chaohu Lake, China".ENVIRONMENTAL POLLUTION 290(2021). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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