Climate Change Data Portal
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, Chuanfei; Wang, Xiaoping; Gong, Ping; Yao, Tandong | |
发表日期 | 2018 |
ISSN | 0048-9697 |
卷号 | 624页码:241-249 |
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. |
英文关键词 | Persistent organic pollutants;Temporal trend;Half-life;Tibetan Plateau |
语种 | 英语 |
WOS研究方向 | Environmental Sciences & Ecology |
WOS类目 | Environmental Sciences |
WOS记录号 | WOS:000426355900026 |
来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT |
来源机构 | 中国科学院青藏高原研究所 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/323 |
推荐引用方式 GB/T 7714 | Wang, Chuanfei,Wang, Xiaoping,Gong, Ping,et al. Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2018,624:241-249. |
APA | Wang, Chuanfei,Wang, Xiaoping,Gong, Ping,&Yao, Tandong.(2018).Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,624,241-249. |
MLA | Wang, Chuanfei,et al."Long-term trends of atmospheric organochlorine pollutants and polycyclic aromatic hydrocarbons over the southeastern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 624(2018):241-249. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。