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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
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume50Issue:5Pages:2371-2380
SubtypeArticle
AbstractWe 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
Indexed BySCI
Language英语
WOS IDWOS:000371371700029
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/126180
Collection胶州湾海洋生态系统国家野外研究站
Affiliation1.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
Recommended Citation
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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