Release of legacy mercury and effect of aquaculture on mercury biogeochemical cycling in highly polluted Ya-Er Lake, China
文献类型：期刊论文
| 作者 | Chen, Lufeng; Zhang, Xing; Cao, Mengxi; Pan, Yu; Xiao, Cailing; Wang, Pu; Liang, Yong; Liu, Guangliang; Cai, Yong |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2021-07 |
| 卷号 | 275页码:- |
| 关键词 | Legacy mercury Release Chlor-alkali industry Aquaculture Ya-Er Lake |
| ISSN号 | 0045-6535 |
| 英文摘要 | Y Although global mercury (Hg) emission from chlor-alkali industry is decreasing, the legacy Hg may still have potential risks due to its environmental persistence. The objective of this work is to study the biogeochemical cycling and potential risk of Hg in the Ya-Er Lake, which was heavily contaminated by historical chlor-alkali production. Higher concentrations of total Hg (THg) in Ya-Er Lake water (16.8 +/- 8.4 ng L-1) and sediment (547 +/- 489 ng g(-1)) than other lake systems were observed, reflecting serious Hg pollution in this system. Diffusion rates of Hg at sediment-water interface and budget of Hg showed that release of legacy Hg in sediment (accounting for similar to 80%) dominated THg in water, and about 80% methylmercury (MeHg) of total was diffused from sediment. Significant correlations between total organic carbon (TOC) derived from aquaculture and THg diffusion and MeHg concentrations in sediment suggest that TOC plays important roles in controlling legacy Hg release and MeHg production. The actual weekly intakes of Hg via consumption of cultured catfish and wild topmouth culter were higher than the established provisional tolerable weekly intake (PTWI) of MeHg. These results indicated that although the nearby chlor-alkali plant has been shut down for three decades, the release of legacy Hg stored in the sediment still adversely affects this ecosystem. Moreover, aquaculture could enhance MeHg production and control MeHg distribution in the polluted aquatic ecosystem, potentially posing a health risk to surrounding inhabitants through consumption of fish. (C) 2021 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45828]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Jianghan Univ, Inst Environm & Hlth, Hubei Key Lab Environm & Hlth Effects Persistent, Wuhan 430056, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Lufeng,Zhang, Xing,Cao, Mengxi,et al. Release of legacy mercury and effect of aquaculture on mercury biogeochemical cycling in highly polluted Ya-Er Lake, China[J]. CHEMOSPHERE,2021,275:-. |
| APA | Chen, Lufeng.,Zhang, Xing.,Cao, Mengxi.,Pan, Yu.,Xiao, Cailing.,...&Cai, Yong.(2021).Release of legacy mercury and effect of aquaculture on mercury biogeochemical cycling in highly polluted Ya-Er Lake, China.CHEMOSPHERE,275,-. |
| MLA | Chen, Lufeng,et al."Release of legacy mercury and effect of aquaculture on mercury biogeochemical cycling in highly polluted Ya-Er Lake, China".CHEMOSPHERE 275(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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