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Mercury speciation and distribution in a glacierized mountain environment and their relevance to environmental risks in the inland Tibetan Plateau
Sun, XJ (Sun, Xuejun)1,4; Zhang, QG (Zhang, Qianggong)1,3; Kang, SC (Kang, Shichang)2,3; Guo, JM (Guo, Junming)2; Li, XF (Li, Xiaofei)2,4; Yu, ZL (Yu, Zhengliang)1,4; Zhang, GS (Zhang, Guoshuai)1; Qu, DM (Qu, Dongmei)1; Huang, J (Huang, Jie)1,3; Cong, ZY (Cong, Zhiyuan)1,3; Wu, GJ (Wu, Guangjian)1,3
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
2018-08-01
Volume631-632Issue:0Pages:270-278
DOI10.1016/j.scitotenv.2018.03.012
Abstract

Glacierized mountain environments can preserve and release mercury (Hg) and play an important role in regional Hg biogeochemical cycling. However, the behavior of Hg in gladerized mountain environments and its environmental risks remain poorly constrained. In this research, glacier meltwater, runoff and wetland water were sampled in Zhadang-Qugaqie basin (ZQB), a typical glacierized mountain environment in the inland Tibetan Plateau, to investigate Hg distribution and its relevance to environmental risks. The total mercury (THg) concentrations ranged from 0.82 to 6.98 ng.L-1, and non-parametric pairwise multiple comparisons of the THg concentrations among the three different water samples showed that the THg concentrations were comparable. The total methylmercury (TMeHg) concentrations ranged from 0.041 to 0.115 ng.L-1, and non-parametric pairwise multiple comparisons of the TMeHg concentrations showed a significant difference. Both the THg and MeHg concentrations of water samples from the ZQB were comparable to those of other remote areas, indicating that Hg concentrations in the ZQB watershed are equivalent to the global background level. Particulate Hg was the predominant form of Hg in all runoff samples, and was significantly correlated with the total suspended particle (TSP) and not correlated with the dissolved organic carbon (DOC) concentration. The distribution of mercury in the wetland water differed from that of the other water samples. THg exhibited a significant correlation with DOC as well as TMeHg, whereas neither THg nor TMeHg was associated with TSP. Based on the above findings and the results from previous work, we propose a conceptual model illustrating the four Hg distribution zones in glacierized environments. We highlight that wetlands may enhance the potential hazards of Hg released from melting glaciers, making them a vital zone for investigating the environmental effect of Hg in glacierized environments and beyond. (C) 2018 Elsevier B.V. All rights reserved.

Subject Area地理学
WOS IDWOS:000432471900029
Language英语
Indexed BySCIE
KeywordNam Co Lake Spatial-distribution Zhadang Glacier Western China Mass-balance Arctic-ocean River-basin Ice Core Deposition Transport
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Cooperation Status国内
ISSN0048-9697
Department环境变化与地表过程重点实验室
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8589
Collection图书馆
Corresponding AuthorZhang, QG (Zhang, Qianggong)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Sun, XJ ,Zhang, QG ,Kang, SC ,et al. Mercury speciation and distribution in a glacierized mountain environment and their relevance to environmental risks in the inland Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,631-632(0):270-278.
APA Sun, XJ .,Zhang, QG .,Kang, SC .,Guo, JM .,Li, XF .,...&Wu, GJ .(2018).Mercury speciation and distribution in a glacierized mountain environment and their relevance to environmental risks in the inland Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,631-632(0),270-278.
MLA Sun, XJ ,et al."Mercury speciation and distribution in a glacierized mountain environment and their relevance to environmental risks in the inland Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 631-632.0(2018):270-278.
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