中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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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