Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau

doi:10.1016/j.scitotenv.2017.12.140

	Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau
	Wang, XP (Wang, Xiaoping)1,2,3; Yao, TD (Yao, Tandong)1,2; Wang, CF (Wang, Chuanfei)1,2; Gong, P (Gong, Ping)1,2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-05-15
卷号	624 期号:0 页码:241-249
关键词	PERSISTENT ORGANIC POLLUTANTS CANADIAN ARCTIC ATMOSPHERE POLYBROMINATED DIPHENYL ETHERS ASSESSMENT PROGRAM AMAP PASSIVE AIR SAMPLERS TEMPORAL TRENDS POLYCHLORINATED-BIPHENYLS GREAT-LAKES ALPHA-HEXACHLOROCYCLOHEXANE SPATIAL-DISTRIBUTION
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.12.140
英文摘要	Long-term monitoring in remote regions is essential for revealing pollution trends at the global scale but relevant studies remain limited. In the present study, a six-year continuous monitoring of atmospheric persistent organic pollutants (POPs) and polycyclic aromatic hydrocarbons (PAHs) was carried out at Lulang in the southeastern Tibetan Plateau (TP). Average concentrations of hexachlorocyclohexanes (HCHs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethanes (DDTs), polychlorinated biphenyls (PCBs) and PAHs were 13.5, 8.9, 41.7, 1.8 pg/m(3)and 6.2 ng/m(3), respectively. Obvious seasonality was found for all the target compounds. HCHs, DDTs and PCBs had their highest concentrations in summer (monsoon season) and lowest in winter, which is consistent with the fluctuation of the Indian monsoon. Meanwhile, HCB and 5-6-ring PAHs showed opposite variations, possibly induced by local sources and the westerly flow in winter. Declining trends were observed for most of the chemicals, except o,p'-DDE, HCB and PCBs. A declining trend in the alpha/gamma-HCH ratio indicated a shift from technical HCHs to lindane. An increasing trend in the o,p'/p,p'-DDT ratio suggested a likely shift from technical DDTs to dicofol. For PAHs, the contribution from high-temperature combustion has increased recently. The half-lives of alpha-HCH, gamma-HCH, o,p'-DDT, p,p'-DDT were 6.1, 108, 77.6 and 14.2years, respectively. The half-lives of gamma-HCH, o,p'-DDT and p,p'-DDT were higher than those in the Arctic, indicating these compounds will persist in the TP for a longer period. The temporal trends in atmospheric POPs were possibly induced by emissions in India and likely driven by wind speed in Lulang. This study contributes toward a better understanding of the behavior and transport of POPs in the TP region. (C) 2017 Elsevier B.V. All rights reserved.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000426355900026
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8646]
专题	青藏高原研究所_图书馆
作者单位	1.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China; 2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Wang, XP ,Yao, TD ,Wang, CF ,et al. Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,624(0):241-249.
APA	Wang, XP ,Yao, TD ,Wang, CF ,&Gong, P .(2018).Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,624(0),241-249.
MLA	Wang, XP ,et al."Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 624.0(2018):241-249.