Assessment of potential bioavailability of heavy metals in the sediments of land-freshwater interfaces by diffusive gradients in thin films
文献类型：期刊论文
| 作者 | Shan, Baoqing; Song, Zhixin; Dong, Lixin; Tang, Wenzhong
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2018 |
| 卷号 | 191页码:218-225 |
| 关键词 | Land-freshwater interfaces Bioavailability Heavy metals DGT |
| ISSN号 | 0045-6535 |
| 文献子类 | Article |
| 英文摘要 | It is important to understand the potential bioavailability of heavy metals in the sediments of land freshwater interfaces (between terrestrial and aquatic ecosystems). Therefore, we evaluated the pollution of Cr, Ni, Cu, Zn, As, and Cd in land-freshwater interface sediments/soils according to total concentrations, and used sequential extraction method to measure different fractions of Cd. Then, the diffusive gradients in thin films (DGT) technique was employed to study the potential bioavailability of metals. Results showed that the concentrations of exchangeable and weak acid soluble fraction and oxidizable fraction were higher in ecotone area, and the values of reducible fraction and residual fraction were higher in deep water area. There existed significant positive correlations between [Cd]-DGT (concentration of Cd measured by DGT) and EXC-Cd (exchangeable and weak acid soluble fraction of Cd) (r(2) = 0.65), but the significant negative correlation was found between [Cd]-DGT and RES-Cd (Residual fraction of Cd) (r(2) = 0.52). DGT technique is a feasible method to measure potential bioavailability of heavy metals for risk assessment in the sediments/soils of land-freshwater interfaces. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41109]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Shan, Baoqing,Song, Zhixin,Dong, Lixin,et al. Assessment of potential bioavailability of heavy metals in the sediments of land-freshwater interfaces by diffusive gradients in thin films[J]. CHEMOSPHERE,2018,191:218-225. |
| APA | Shan, Baoqing,Song, Zhixin,Dong, Lixin,&Tang, Wenzhong.(2018).Assessment of potential bioavailability of heavy metals in the sediments of land-freshwater interfaces by diffusive gradients in thin films.CHEMOSPHERE,191,218-225. |
| MLA | Shan, Baoqing,et al."Assessment of potential bioavailability of heavy metals in the sediments of land-freshwater interfaces by diffusive gradients in thin films".CHEMOSPHERE 191(2018):218-225. |
入库方式： OAI收割
来源：生态环境研究中心
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