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Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau
Wang, CF (Wang, Chuanfei)1,2; Wang, XP (Wang, Xiaoping)1,2,3; Gong, P (Gong, Ping)1,2; Yao, TD (Yao, Tandong)1,2
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
2018-05-15
Volume624Issue:0Pages:241-249
DOI10.1016/j.scitotenv.2017.12.140
AbstractLong-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 IDWOS:000426355900026
Language英语
Indexed BySCIE
KeywordPERSISTENT ORGANIC POLLUTANTS CANADIAN ARCTIC ATMOSPHERE POLYBROMINATED DIPHENYL ETHERS ASSESSMENT PROGRAM AMAP PASSIVE AIR SAMPLERS TEMPORAL TRENDS POLYCHLORINATED-BIPHENYLS GREAT-LAKES ALPHA-HEXACHLOROCYCLOHEXANE SPATIAL-DISTRIBUTION
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Cooperation Status国内
ISSN0048-9697
Department环境变化与地表过程重点实验室
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8646
Collection图书馆
Affiliation1.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.
Recommended Citation
GB/T 7714
Wang, CF ,Wang, XP ,Gong, P ,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, CF ,Wang, XP ,Gong, P ,&Yao, TD .(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, CF ,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.
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