Application of DGT/DIFS combined with BCR to assess the mobility and release risk of heavy metals in the sediments of Nansi Lake, China
文献类型：期刊论文
| 作者 | Zhang, Min; Li, Cai; Yang, Liyuan; Ding, Shiming; Ma, Xin; Zhang, You; Zhao, Tingting |
| 刊名 | ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
 |
| 出版日期 | 2020 |
| 卷号 | 42期号:11页码:3765-3778 |
| 英文摘要 | The heavy metal contamination of the aquatic ecosystem is still prevalent even after reduction of the external anthropogenic inputs of the metals. The release of labile heavy metals from the sediments into the water is a potential risk, responsible for the contamination of the aquatic system. Herein, samples of sedimentary column cores were collected in Nansi Lake, and the distribution profiles of the labile and soluble metals (Cd, Cu, Ni, Pb, and Zn) were obtained by the diffusive gradient in thin films (DGT) and the high-resolution dialysis (HR-peeper) technique. Furthermore, the mobility, bioavailability and release risk of the heavy metals were assessed using the results of geochemical sequential extraction, DGT as well as the DGT-induced fluxes in sediments (DIFS) model. The results showed that the profile characteristics of the DGT-labile and soluble heavy metals showed irregular distribution in the sediment cores and Cd, Pb, Zn had an obvious positive correlation with Fe/Mn (p < 0.05). Ni, Cu, and Zn existed primarily in the residual fraction (accounting for 58-76%), while Cd and Pb existed in the reducible fraction (accounting for 50-67%). The Cd and Ni (0.027-0.185) had higher mobility coefficients compared with Pb, Cu, and Zn (0-0.011), and positive diffusive fluxes also proved that Cd and Ni were easy to be released from the sediments. In addition, theRvalues of five metals (0.18-0.85) ranged betweenR(diff)to 0.95, indicating that all the metals had partially sustained case from the sediments solid phase. Based on the DIFS model, the five metals had weak mobility from the sediment to pore water, but the release risks in the Nansi Lake should also be of concern, especially for the highly mobile Cd and Ni in the Dushan Lake. |
| 源URL | [http://159.226.73.51/handle/332005/20138]  |
| 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 | Zhang, Min,Li, Cai,Yang, Liyuan,et al. Application of DGT/DIFS combined with BCR to assess the mobility and release risk of heavy metals in the sediments of Nansi Lake, China[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2020,42(11):3765-3778. |
| APA | Zhang, Min.,Li, Cai.,Yang, Liyuan.,Ding, Shiming.,Ma, Xin.,...&Zhao, Tingting.(2020).Application of DGT/DIFS combined with BCR to assess the mobility and release risk of heavy metals in the sediments of Nansi Lake, China.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,42(11),3765-3778. |
| MLA | Zhang, Min,et al."Application of DGT/DIFS combined with BCR to assess the mobility and release risk of heavy metals in the sediments of Nansi Lake, China".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 42.11(2020):3765-3778. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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