Assessment methodology applied to arsenic pollution in lake sediments combining static and dynamic processes
文献类型：期刊论文
| 作者 | Shu, Limin; Ng, Jack C.; Tang, Wenzhong ; Zhao, Yu; Sun, Liu; Zhang, Hong
|
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021-08 |
| 卷号 | 277页码:- |
| 关键词 | Arsenic Lake sediments Risk assessment Fraction transformation DGH model |
| ISSN号 | 0045-6535 |
| 英文摘要 | The fraction transformation from stable to mobile forms in sediments is continuous, slow, and spontaneous chain reactions causing static risks to the aquatic system. However, this process may change into abrupt, rapid, and dynamic paths when certain physicochemical conditions changed. Using the Delayed Geochemical Hazard (DGH) model, comprehensive methods combing both static and dynamic risk assessment were therefore conducted to evaluate the aforementioned processes. By applying these methods, arsenic (As) pollution in surface sediments of the Baiyangdian Lake (BYD Lake) was investigated thoroughly as a case study area. The results showed that the total As concentrations in those sediment samples ranged from 4.87 to 17.94 mg/kg, with an average of 8.75 mg/kg. In a fraction, Fe and Mn were observed to pose effects on the surface-adsorbed (AsS) and residual fractions (AsR) with the coefficient analysis. The static risk assessment showed that both the contamination and ecological risk are at a low level in the total content but a low to moderate risk in the fraction. The dynamic risk assessment posted the potential transformation paths of As in the sediments, indicating a trend of potential DGH burst in 45.24%-78.57% of the BYD Lake. In summary, this study provides a methodology for the risk assessment of arsenic that may extend to other heavy metal(loid)s combining static and dynamic processes in sediments. (C) 2021 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45909]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Univ Queensland, Queensland Alliance Environm Hlth Sci, Brisbane, Qld 4102, Australia 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shu, Limin,Ng, Jack C.,Tang, Wenzhong,et al. Assessment methodology applied to arsenic pollution in lake sediments combining static and dynamic processes[J]. CHEMOSPHERE,2021,277:-. |
| APA | Shu, Limin,Ng, Jack C.,Tang, Wenzhong,Zhao, Yu,Sun, Liu,&Zhang, Hong.(2021).Assessment methodology applied to arsenic pollution in lake sediments combining static and dynamic processes.CHEMOSPHERE,277,-. |
| MLA | Shu, Limin,et al."Assessment methodology applied to arsenic pollution in lake sediments combining static and dynamic processes".CHEMOSPHERE 277(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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