气候变化领域集成服务门户(CCPortal): Hydrochemical assessment (major ions and Hg) of meltwater in high altitude glacierized Himalayan catchment

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DOI	10.1007/s10661-019-7338-y
	Hydrochemical assessment (major ions and Hg) of meltwater in high altitude glacierized Himalayan catchment
	Lone, Altaf; Jeelani, G.; Deshpande, Rajendrakumar D.; Kang, Shichang; Huang, Jie
发表日期	2019
ISSN	0167-6369
EISSN	1573-2959
卷号	191 期号:4
英文摘要	Snowpack and glacial melt samples were collected to understand the hydrochemical, isotopic characteristics and the source of Hg contamination in high altitude glacierized Himalayan catchment. Both the snow and glacial melt were acidic in nature with calcium and magnesium as the dominant cations and bicarbonate and chloride as the dominant anions. The major ion concentrations for cations were found to be Ca2+>Mg2+>Na+>K+ and HCO3->Cl->SO42->NO3- for anions. The atmospheric processes like the precipitation source and aerosol scavenging control the snow chemistry and the weathering of the rocks modify the hydrochemistry of glacial melt. The samples of both the snow and glacial melt were classified as Ca-Mg-HCO3- type. The concentration of Hg in snow (154.95ngL(-1)) and glacial melt (112.04ngL(-1)) was highest (still lower compared to the maximum permissible limit (1000ngL(-1)) by WHO in drinking water) during summer season (August-September) and lowest (snow 2.2 and 40.01ngL(-1) for glacial melt) during winter (November). The results reveal that mercury concentration in snowpacks is attributed to the combined mixing of long-range transport of pollutants via westerlies throughout the year and the industrial effluents coming from highly industrial belts of Panjab, Haryana, Rajasthan, Indo-Gangetic plains, and neighboring areas via southwest monsoons during August-September. However, in glacial melt, the Hg concentration was typically controlled by rate of melting, leaching, and percolation. Higher degree and rate of glacial melting decreases the Hg concentration in glacial melt. Stable isotopic analysis and backward air mass trajectory modeling also corroborate the source of precipitation from southwest monsoons during August-September, with its air mass trajectories passing through the highly industrialized belts of Indo-Gangetic plain and adjoining areas.
关键词	Snowpack Glacial melt Weathering Pollutants Stable isotopes HYSPLIT model
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	ENVIRONMENTAL MONITORING AND ASSESSMENT
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/112034
作者单位	Univ Kashmir, Dept Earth Sci, Srinagar 190006, Jammu & Kashmir, India
推荐引用方式 GB/T 7714	Lone, Altaf,Jeelani, G.,Deshpande, Rajendrakumar D.,et al. Hydrochemical assessment (major ions and Hg) of meltwater in high altitude glacierized Himalayan catchment[J]. 中国科学院西北生态环境资源研究院,2019,191(4).
APA	Lone, Altaf,Jeelani, G.,Deshpande, Rajendrakumar D.,Kang, Shichang,&Huang, Jie.(2019).Hydrochemical assessment (major ions and Hg) of meltwater in high altitude glacierized Himalayan catchment.ENVIRONMENTAL MONITORING AND ASSESSMENT,191(4).
MLA	Lone, Altaf,et al."Hydrochemical assessment (major ions and Hg) of meltwater in high altitude glacierized Himalayan catchment".ENVIRONMENTAL MONITORING AND ASSESSMENT 191.4(2019).