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Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal
Tripathee, L (Tripathee, Lekhendra)1,3; Guo, JM (Guo, Junming)1; Kang, SC (Kang, Shichang)1,2; Paudyal, R (Paudyal, Rukumesh)1,3; Huang, J (Huang, Jie)4; Sharma, CM (Sharma, Chhatra Mani)3,5; Zhang, QG (Zhang, Qianggong)4; Rupakheti, D (Rupakheti, Dipesh)4; Chen, PF (Chen, Pengfei)1; Ghimire, PS (Ghimire, Prakriti Sharma)1,3; Gyawali, A (Gyawali, Ayush)5
Source PublicationHUMAN AND ECOLOGICAL RISK ASSESSMENT
2019
Volume25Issue:4Pages:1006-1017
DOI10.1080/10807039.2018.1459180
Abstract

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.

Subject AreaEnvironmental Sciences
WOS IDWOS:000472553200013
Language英语
Indexed BySCI
KeywordTrace-elements Surface Soil Tibetan Deposition Glacier Metals Forest Area
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Environmental Sciences
Cooperation Status国际
ISSN1080-7039
Department环境变化与地表过程
URL查看原文
PublisherTAYLOR & FRANCIS INC
SubtypeArticle
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Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9298
Collection图书馆
Corresponding AuthorGuo, JM (Guo, Junming)
Affiliation1.Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China;
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
3.HERI, Kathmandu, Nepal;
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China;
5.Kathmandu Univ, Dept Environm Sci & Engn, Dhulikhel, Nepal.
Recommended Citation
GB/T 7714
Tripathee, L ,Guo, JM ,Kang, SC ,et al. Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal[J]. HUMAN AND ECOLOGICAL RISK ASSESSMENT,2019,25(4):1006-1017.
APA Tripathee, L .,Guo, JM .,Kang, SC .,Paudyal, R .,Huang, J .,...&Gyawali, A .(2019).Concentration and risk assessments of mercury along the elevation gradient in soils of Langtang Himalayas, Nepal.HUMAN AND ECOLOGICAL RISK ASSESSMENT,25(4),1006-1017.
MLA Tripathee, L ,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):1006-1017.
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