Mercury Redox Chemistry in Waters of the Eastern Asian Seas: From Polluted Coast to Clean Open Ocean
Ci, Zhijia1; Zhang, Xiaoshan1; Yin, Yongguang1; Chen, Jinsheng2; Wang, Shiwei3
2016-03-01
发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷号50期号:5页码:2371-2380
文章类型Article
摘要We performed incubation experiments using seawaters from representative marine environments of the eastern Asian seas to determine the mercury (Hg) available for photoreduction (Hgr(II)), to investigate the Hg redox reaction kinetics, and to explore the effect of environmental factors and water chemistry on the Hg redox chemistry. Results show that Hgr(II) accounted for a considerable fraction of total Hg (THg) (%Hgr(II)/THg: 24.90 +/- 10.55%, n = 27) and positively correlated with THg. Filtration decreased the Hgr(II) pool of waters with high suspended particulate matter (SPM). The positive linear relationships were found between pseudo -first order rate constants of gross Hg(II) photoreduction (kr) and gross Hg(0) photo -oxidation (k(o)) with photosynthetically active radiation (PAR). Under the condition of PAR of 1 m mol m(-2) s(-1), the kr were significantly (p < 0.05) lower than kr, (k(r)/k(o): 0.86 +/- 0.22). The Hg(0) dark oxidation were significantly higher than the Hg(II) dark reduction. The Hg(II) dark reduction was positively correlated to THg, and the anaerobic condition favored the Hg(II) dark reduction. Filtration significantly influenced the Hg photoredox chemistry of waters with high SPM. UVB radiation was important for both Hg(II) photoreduction and Hg(0) photo -oxidation, and the role of other wavebands in photoinduced transformations of Hg varied with the water chemistry.
DOI10.1021/acs.est.5b05372
收录类别SCI
语种英语
WOS记录号WOS:000371371700029
引用统计
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/126180
专题胶州湾海洋生态系统国家野外研究站
作者单位1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
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GB/T 7714
Ci, Zhijia,Zhang, Xiaoshan,Yin, Yongguang,et al. Mercury Redox Chemistry in Waters of the Eastern Asian Seas: From Polluted Coast to Clean Open Ocean[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(5):2371-2380.
APA Ci, Zhijia,Zhang, Xiaoshan,Yin, Yongguang,Chen, Jinsheng,&Wang, Shiwei.(2016).Mercury Redox Chemistry in Waters of the Eastern Asian Seas: From Polluted Coast to Clean Open Ocean.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(5),2371-2380.
MLA Ci, Zhijia,et al."Mercury Redox Chemistry in Waters of the Eastern Asian Seas: From Polluted Coast to Clean Open Ocean".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.5(2016):2371-2380.
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