气候变化领域集成服务门户(CCPortal): Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife

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DOI	10.1016/j.scitotenv.2016.03.006
	Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife
	Bi, Xiang; Luo, Wei; Gao, Jiajia; Xu, Lan; Guo, Junming; Zhang, Qianggong; Romesh, Kumar Y.; Giesy, John P.; Kang, Shichang; de Boer, Jacob
发表日期	2016
ISSN	0048-9697
EISSN	1879-1026
卷号	556
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.
关键词	Tibetan Plateau Nepal China PMF model Toxicity assessment Mountain
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/111841
作者单位	Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Bi, Xiang,Luo, Wei,Gao, Jiajia,et al. Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife[J]. 中国科学院西北生态环境资源研究院,2016,556.
APA	Bi, Xiang.,Luo, Wei.,Gao, Jiajia.,Xu, Lan.,Guo, Junming.,...&de Boer, Jacob.(2016).Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife.SCIENCE OF THE TOTAL ENVIRONMENT,556.
MLA	Bi, Xiang,et al."Polycyclic aromatic hydrocarbons in soils from the Central-Himalaya region: Distribution, sources, and risks to humans and wildlife".SCIENCE OF THE TOTAL ENVIRONMENT 556(2016).