Temporal variation (2011-2014) of atmospheric OCPs at King George Island, west Antarctica

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Temporal variation (2011-2014) of atmospheric OCPs at King George Island, west Antarctica
	Fu, Jianjie; Wang, Pu; Meng, Wenying; Li, Yingming; Zhang, Qinghua; Zhang, Lin; Yang, Ruiqiang; Jiang, Guibin
刊名	ATMOSPHERIC ENVIRONMENT
	2018-10-01
卷号	191 页码:432-439
关键词	Antarctica air Organochlorine pesticides Temporal variation Gas-particle partitioning Chiral signature Source implication
ISSN号	1352-2310
文献子类	Article
英文摘要	A three-year sampling campaign (Jan 2011-Jan 2014) was conducted on organochlorine pesticides (OCPs) using high-volume air sampling nearby the Chinese Great Wall Station, west Antarctica. The concentrations of Sigma(23)OCPs ranged between 5.87 and 27.9 pg m(-3) (mean 14.3 +/- 5.4 pg m(-3)), and no temporal trend was observed over the entire sampling period. However, the dominant compound, hexachlorobezene (HCB) (71% on average of Sigma(23)OCPs), exhibited a seasonal variation with higher levels in the austral winter. Gas-particle partitioning of OCPs was explored based on K-OA absorption model, steady-state model and Junge-Pankow adsorption model. LogK(p) showed significantly negative correlations with logP(L)(0) of OCPs (p < 0.01, the slope is -0.30) and TSP values in the samples (p < 0.01), suggesting absorption by the organic matter as the dominant sorption process and TSP as an important factor influencing gas-particle partitioning of OCPs in this remote environment. The chiral signature indicated a commonly nonracemic residue of alpha-HCH and o,p'-DDT in the Antarctic air. The deviation from racemic (DFR) of o,p'-DDT showed a strongly negative dependence on its concentration (p < 0.01), properly suggesting more fresh input of o,p'-DDT after 2011. Preferential depletion of (+) alpha-HCH was observed mainly in gas phase, indicating the influence of re-volatilization of chiral compounds from source areas and/or ocean on their enantiomeric composition in remote air. Source apportionment demonstrated that long range atmospheric transport (LRAT) was the main transport pathway of OCPs, while nonracemic residues of HCHs and DDTs indicated a contribution of secondary source emission, i.e. seawater-air exchange, to their occurrence in west Antarctica.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41065]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Fu, Jianjie,Wang, Pu,Meng, Wenying,et al. Temporal variation (2011-2014) of atmospheric OCPs at King George Island, west Antarctica[J]. ATMOSPHERIC ENVIRONMENT,2018,191:432-439.
APA	Fu, Jianjie.,Wang, Pu.,Meng, Wenying.,Li, Yingming.,Zhang, Qinghua.,...&Jiang, Guibin.(2018).Temporal variation (2011-2014) of atmospheric OCPs at King George Island, west Antarctica.ATMOSPHERIC ENVIRONMENT,191,432-439.
MLA	Fu, Jianjie,et al."Temporal variation (2011-2014) of atmospheric OCPs at King George Island, west Antarctica".ATMOSPHERIC ENVIRONMENT 191(2018):432-439.