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DOI	10.1016/j.gsf.2021.101274
	Atmospheric particle-bound mercury in the northern Indo-Gangetic Plain region: Insights into sources from mercury isotope analysis and influencing factors
	Guo, Junming; Tripathee, Lekhendra; Kang, Shichang; Zhang, Qianggong; Huang, Jie; Sharma, Chhatra Mani; Chen, Pengfei; Paudyal, Rukumesh; Rupakheti, Dipesh
通讯作者	Tripathee, L (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	1674-9871
卷号	13 期号:1
英文摘要	Lumbini isa world heritage site located in the southern plains region of Nepal, and is regarded as a potential site for evaluating transboundary air pollution due to its proximity to the border with India. In this study, 82 aerosol samples were collected between April 2013 and July 2014 to investigate the levels of particulate-bound mercury (PBM) and the corresponding seasonality, sources, and influencing factors. The PBM concentration in total suspended particulate (TSP) matter ranged from 6.8 pg m-3 to 351.7 pg m-3 (mean of 99.7 +/- 92.6 pg m-3), which exceeded the ranges reported for remote and rural sites worldwide. The Hg content (PBM/TSP) ranged from 68.2 ng g-1 to 1744.8 ng g-1 (mean of 446.9 +/- 312.7 ng g-1), indicating anthropogenic enrichment. The PBM levels were higher in the dry season (i.e., winter and the pre-monsoon period) than in the wet season (i.e., the monsoon period). In addition, the d202Hg signature indicated that waste/coal burning and traffic were the major sources of Hg in Lumbini during the pre-monsoon period. Meanwhile, precipitation occurring during photochemical processes in the atmosphere may have been responsible for the observed D199Hg values in the aerosol samples obtained during the monsoon period. The PBM concentration was influenced mostly by the resuspension of polluted dust during dry periods and crop residue burning during the post-monsoon period. The estimated PBM deposition flux at Lumbini was 15.7 lg m-2 yr-1. This study provides a reference dataset of atmospheric PBM over a year, which can be useful for understanding the geochemical cycling of Hg in this region of limited data. (c) 2021 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
关键词	FRACTIONATED PARTICULATE MERCURY SPATIOTEMPORAL VARIATIONS WET PRECIPITATION CENTRAL HIMALAYAS TIBETAN PLATEAU AMBIENT AIR NEPAL DEPOSITION LUMBINI URBAN
英文关键词	Particle-bound mercury; Seasonality; Mercury isotopes; Deposition flux; Indo-Gangetic Plain
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000731455900005
来源期刊	GEOSCIENCE FRONTIERS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254005
作者单位	[Guo, Junming; Tripathee, Lekhendra; Kang, Shichang; Chen, Pengfei; Paudyal, Rukumesh; Rupakheti, Dipesh] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Tripathee, Lekhendra; Paudyal, Rukumesh] Himalayan Environm Res Inst HERI, Kathmandu, Nepal; [Zhang, Qianggong; Huang, Jie] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China; [Kang, Shichang; Zhang, Qianggong; Huang, Jie] Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China; [Kang, Shichang] Univ Chinese Acad Sci, Beijing 100039, Peoples R China; [Sharma, Chhatra Mani] Tribhuvan Univ, Cent Dept Environm Sci, Kathmandu, Nepal
推荐引用方式 GB/T 7714	Guo, Junming,Tripathee, Lekhendra,Kang, Shichang,et al. Atmospheric particle-bound mercury in the northern Indo-Gangetic Plain region: Insights into sources from mercury isotope analysis and influencing factors[J]. 中国科学院西北生态环境资源研究院,2022,13(1).
APA	Guo, Junming.,Tripathee, Lekhendra.,Kang, Shichang.,Zhang, Qianggong.,Huang, Jie.,...&Rupakheti, Dipesh.(2022).Atmospheric particle-bound mercury in the northern Indo-Gangetic Plain region: Insights into sources from mercury isotope analysis and influencing factors.GEOSCIENCE FRONTIERS,13(1).
MLA	Guo, Junming,et al."Atmospheric particle-bound mercury in the northern Indo-Gangetic Plain region: Insights into sources from mercury isotope analysis and influencing factors".GEOSCIENCE FRONTIERS 13.1(2022).