Air monitoring of polychlorinated biphenyls, polybrominated diphenyl ethers and organochlorine pesticides in West Antarctica during 2011-2017: Concentrations, temporal trends and potential sources

被引：48
作者：
Hao, Yanfen [1 ,2 ]
Li, Yingming [1 ]
Han, Xu [1 ,2 ]
Wang, Thanh [3 ]
Yang, Ruiqiang [1 ]
Wang, Pu [1 ]
Xiao, Ke [1 ]
Li, Wenjuan [1 ]
Lu, Huili [1 ]
Fu, Jianjie [1 ]
Wang, Yawei [1 ,2 ]
Shi, Jianbo [1 ,2 ]
Zhang, Qinghua [1 ,2 ]
Jiang, Guibin [1 ,2 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Orebro Univ, MTM Res Ctr, SE-70182 Orebro, Sweden
来源：
ENVIRONMENTAL POLLUTION | 2019年 / 249卷
基金：
中国国家自然科学基金;
关键词：
Antarctica; Atmosphere; Passive air sampling; Temporal trends; POPs; PERSISTENT ORGANIC POLLUTANTS; LONG-RANGE TRANSPORT; KING GEORGE ISLAND; ATMOSPHERIC CONCENTRATIONS; CHLORINATED PESTICIDES; STOCKHOLM CONVENTION; FLAME RETARDANTS; PCB CONGENERS; TERM TRENDS; POPS;
D O I：
10.1016/j.envpol.2019.03.039
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Annual air samples were collected at various sites in the Fildes Peninsula, West Antarctica from December 2010 to January 2018 using XAD-2 resin passive air samplers to investigate concentrations, temporal trends and potential sources of persistent organic pollutants (POPs) in Antarctic air. Relatively low concentrations of polychlorinated biphenyls (PCBs) (Sigma(19)PCBs: 1.5-29.7 pg/m(3)), polybrominated diphenyl ethers (PBDEs) (Sigma 12PBDEs: 0.2-2.9 pg/m(3)) and organochlorine pesticides (OCPs) (Sigma(13)OCPs: 101-278 pg/m(3)) were found in the atmosphere of West Antarctica. PCB-11, BDE-47 and hexachlorobenzene (HCB) were the predominant compounds in the atmosphere. The concentrations of PCBs, HCHs, DDTs and endosulfans were found to show decreasing temporal trends, whereas uniform temporal trends were observed for HCB. The atmospheric half-life values for PCBs, HCHs, DDTs and endosulfans in Antarctic air were estimated for the first time, using regressions of the natural logarithm of the concentrations versus the number of years, obtaining the values of 2.0, 2.0, 2.4 and 1.2 year, respectively. An increasing ratio of alpha-HCH/gamma-HCH indicated long residence time for alpha-HCH and possible transformation of gamma-HCH to alpha-HCH in the atmosphere. The ratios of p,p'-DDT/p,p'-DDE were mostly lower than unity in this study, which could be attributed to aged sources. It was found that long-range atmospheric transport was still considered to be the main contributing factor to the atmospheric levels of the POPs in West Antarctica whereas the contribution of human activities at the Chinese Great Wall Station was minor. The results of this study give a view on the most recent temporal trends and provide new insights regarding the occurrence of various POPs in the Antarctic atmosphere. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：381 / 389
页数：9
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