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学科主题: 地理学::自然地理学
题名: Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife
作者: Bi, X (Bi, Xiang)1, 2; Luo, W (Luo, Wei)1; Gao, JJ (Gao, Jiajia)1, 10; Xu, L (Xu, Lan)1; Guo, JM (Guo, Junming)3; Zhang, QG (Zhang, Qianggong)3, 4; Romesh, KY (Romesh, Kumar Y.)5; Giesy, JP (Giesy, John P.)6, 7; Kang, SC (Kang, Shichang)4, 8; de Boer, J (de Boer, Jacob)9
通讯作者: Luo, W
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2016
DOI: 10.1016/j.scitotenv.2016.03.006
卷: 556, 期:0, 页:12-22
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: The Central Himalayas are not only a natural boundary between China and Nepal but also a natural barrier for transport of air masses from South Asia. In this study, 99 samples of surface soil were collected from five regions of Nepal on the southern side of the Central Himalayas, and 65 samples of surface soil were obtained from the northern side on the edge of the Tibetan Plateau, China (TPC). Concentrations of polycyclic aromatic hydrocarbons (PAHs) in soils were measured to determine their distribution, potential for accumulation, and sources, as well as risks to humans and the environment. Mean concentrations of Sigma(16)PAHs were 2.4 x 10(2) and 3.3 x 10(2) ng/g dry mass (dm) in soils collected from the TPC and Nepal, respectively. Significant correlations between concentrations of lower molecular weight PAHs (LMW-PAHs) in soils and altitude were found. Total organic carbon (TOC) in soil was positively but weakly correlated with concentrations of PAHs in the study area, which suggested little role of TOC in adsorption of PAHs. The cities of Kathmandu and Pokhara in Nepal and Nyemo (especially Zhangmu Port), Shigatse, and Lhasa on the TPC, were areas with relatively great concentrations of PAHs in soils. The main sources of PAHs identified by positive matrix factorization were emissions from motor vehicles and combustion of coal and biomass in the Central Himalayas. Calculated total benzo[ a] pyrene potency equivalents of 0.23-44 ng/g dm and index of additive cancer risk of 3.8 x 10(-3) - 9.2 x 10(-1) indicated that PAHs in almost all soils investigated posed de minimis risk of additional cancer to residents via direct contact and had no significant risk of additional cancers through consumption of potable water. Mean risk quotient values indicated that 39% of soils had a slight risk to wildlife and the ambient environment of the Central Himalayas. (C) 2016 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000373278700002
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7677
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100864, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Kathmandu Univ, Sch Sci, Dept Environm Sci & Engn, Kathmandu 6250, Nepal
6.Univ Saskatchewan, Dept Vet Biomed Sci, Saskatoon, SK, Canada
7.Univ Saskatchewan, Toxicol Ctr, Saskatoon, SK, Canada
8.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China
9.Vrije Univ Amsterdam, Inst Environm Studies, De Boelelaan 1087, NL-1081 HV Amsterdam, Netherlands
10.Tibet Climat Ctr, Lhasa 850001, Peoples R China

Recommended Citation:
Bi, X ,Luo, W ,Gao, JJ ,et al. Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,556(0):12-22.
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