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DOI	10.1080/10807039.2018.1459180
	Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal
	Tripathee, Lekhendra; Guo, Junming; Kang, Shichang; Paudyal, Rukumesh; Huang, Jie; Sharma, Chhatra Mani; Zhang, Qianggong; Rupakheti, Dipesh; Chen, Pengfei; Ghimire, Prakriti Sharma; Gyawali, Ayush
发表日期	2019
ISSN	1080-7039
EISSN	1549-7860
卷号	25 期号:4
英文摘要	The fragile Himalayan region could be regarded as the sink for various pollutants transported from urbanized and polluted areas of South Asia. Therefore, in order to understand the concentrations, spatial distribution, pollution, and risk assessments of toxic heavy metal, mercury (Hg), surface soil samples were taken from the central Himalayas in the Langtang region. The average THg concentration in the Langtang Himalayas was 35.75 +/- 24.41(ngg(-1)), which is comparable to the Tibetan top soil values and slightly lower than world average soil values. In addition, an inverse relationship of THg with elevation were observed (i.e. decrease in concentration with increase in elevation) in the Langtang Himalayan soils. Meanwhile, THg concentrations and TOC% were significantly positively correlated at both the depths (0-10 and 10-20 cm), inferring the sorption capacity of organic carbon for Hg. The results of the geo-accumulation index (I-geo), enrichment factor (EF), and pollution index (PI) indicated limited or no pollution by Hg in the Himalayan soils. Further, surface soils had a low potential ecological risk in the region. Therefore, the Hg value from this study could be used for the further evaluation and calculation of I-geo, EF, and PI for water, soil, and aerosol in the Himalayan region as background reference value. However, Hg pollution from long-range transport and atmospheric deposition (wet/dry) in future could not be ignored in the Himalayan region.
关键词	soil mercury risk assessments background value Himalayas
学科领域	Biodiversity & Conservation; Environmental Sciences & Ecology
语种	英语
WOS研究方向	Biodiversity Conservation ; Environmental Sciences
来源期刊	HUMAN AND ECOLOGICAL RISK 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/112031
作者单位	Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Tripathee, Lekhendra,Guo, Junming,Kang, Shichang,et al. Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal[J]. 中国科学院西北生态环境资源研究院,2019,25(4).
APA	Tripathee, Lekhendra.,Guo, Junming.,Kang, Shichang.,Paudyal, Rukumesh.,Huang, Jie.,...&Gyawali, Ayush.(2019).Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal.HUMAN AND ECOLOGICAL RISK ASSESSMENT,25(4).
MLA	Tripathee, Lekhendra,et al."Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal".HUMAN AND ECOLOGICAL RISK ASSESSMENT 25.4(2019).