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DOI	10.1016/j.chemosphere.2021.131105
	Perfluoroalkyl substances in precipitation from the Tibetan Plateau during monsoon season: Concentrations, source regions and mass fluxes
	Chen, Mengke; Wang, Chuanfei; Gao, Ke; Wang, Xiaoping; Fu, Jianjie; Gong, Ping; Wang, Yongjie
通讯作者	Wang, XP ; Fu, JJ (通讯作者)
发表日期	2021
ISSN	0045-6535
EISSN	1879-1298
卷号	282
英文摘要	Atmospheric wet deposition is an important process for the occurrence of perfluoroalkyl substances (PFASs) in polar/remote mountain regions; however, there are limited data on PFASs in precipitation from the Tibetan Plateau (TP). Precipitation (rain from May to October 2017) was therefore collected across the TP to investigate the concentrations, composition profiles, sources, and fluxes of perfluoroalkyl acids (PFAAs). The average Sigma PFAA concentrations ranged from 212.3 pg L-1 to 547.7 pg L-1, and perfluoroalkyl carboxylic acids (PFCAs) accounted for 87% of the measured PFAAs (mean value). Significant positive associations (p < 0.05) were found for most PFCAs in the southeast TP, indicating that they may come from similar sources. The monthly PFAA deposition flux ranged from 12.6 to 68.9 ng m(-2) month(-1), decreasing from east to west. As climate of the eastern TP is controlled mainly by the Indian monsoon, indicating that the Indian monsoon plays an important role in delivering PFAAs to the TP. PCA (principal component analysis) combined with back-trajectory analysis was used to estimate the atmospheric transport pathways, and the PSCF (potential source contribution function) model was applied to define the potential source regions of individual PFAAs. The results suggested that northeast India, Bangladesh, and southern Nepal are the potential sources of C4-C7 PFCAs; C8-C10 PFCAs are more influenced by emissions from southern Nepal and Bhutan; while the source regions of long-chain PFCAs (C11-C12) can be attributed to northern India and Pakistan. Specifically, PFOS (perfluorooctane sulfonic acid) has a local contribution from the central TP.
关键词	PERSISTENT ORGANIC POLLUTANTS PERFLUORINATED CHEMICALS POLYFLUOROALKYL SUBSTANCES ORGANOCHLORINE PESTICIDES WET DEPOSITION SURFACE-WATER TRANSPORT SNOW RAIN ENVIRONMENT
英文关键词	Emerging pollutants; PFAAs; Precipitation; The Tibetan plateau; Wet deposition flux
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000679116200005
来源期刊	CHEMOSPHERE
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/260211
推荐引用方式 GB/T 7714	Chen, Mengke,Wang, Chuanfei,Gao, Ke,et al. Perfluoroalkyl substances in precipitation from the Tibetan Plateau during monsoon season: Concentrations, source regions and mass fluxes[J]. 中国科学院青藏高原研究所,2021,282.
APA	Chen, Mengke.,Wang, Chuanfei.,Gao, Ke.,Wang, Xiaoping.,Fu, Jianjie.,...&Wang, Yongjie.(2021).Perfluoroalkyl substances in precipitation from the Tibetan Plateau during monsoon season: Concentrations, source regions and mass fluxes.CHEMOSPHERE,282.
MLA	Chen, Mengke,et al."Perfluoroalkyl substances in precipitation from the Tibetan Plateau during monsoon season: Concentrations, source regions and mass fluxes".CHEMOSPHERE 282(2021).