Seasonal and diurnal variation in concentrations of gaseous and particulate phase endosulfan

被引:12
|
作者
Li, Qingbo [1 ,2 ]
Wang, Xianyu [1 ]
Song, Jing [3 ]
Sui, Hongqi [4 ]
Huang, Lei [1 ]
Li, Lu [1 ]
机构
[1] Dalian Maritime Univ, Coll Environm Sci & Engn, Dalian 116026, Peoples R China
[2] Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
[3] Chinese Acad Sci, Key Lab Soil Environm & Pollut Remediat, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
[4] Dalian Meteorol Bur, Dalian, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
Endosulfan; Seasonal-diurnal variation; Gaseous-particulate phase distribution; Dalian; ORGANOCHLORINE PESTICIDES; ATMOSPHERE; TRANSPORT;
D O I
10.1016/j.atmosenv.2012.07.068
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Successive 52-week air monitoring of alpha-endosulfan (alpha-E), beta-endosulfan (beta-E) and endosulfan sulfate (E.S) in the gaseous and particulate phases was conducted in Dalian city, northeast China by using an active high-volume sampler. Significant seasonal and diurnal variations in endosulfan concentrations were observed. It was found that the concentration of gaseous-phase alpha-E peaked in the summer and the concentration of particulate phase alpha-E peaked in the winter. For E.S, both gaseous and particulate phase concentrations peaked in the summer. alpha-E was distributed predominantly in the gas phase in the summer but was distributed mainly in the particulate phase in the winter. beta-E was distributed mainly in the gas phase in the summer and in the particulate phase at other times of the year. E.S was distributed mainly in the particulate phase throughout the year. Elevated temperatures facilitated the volatilization of alpha-E from particle surfaces but exerted little effect on beta-E and had almost no effect on E.S. Trajectory-based analysis indicates that the seasonal variation in atmospheric concentrations of endosulfan in Dalian city was influenced strongly by the land and sea air masses. In addition, differences in endosulfan concentrations in the particulate phase between day and night were likely due to the circulation of sea/land breezes. The 'cold-condensation' effect occurring during the night may result in the attachment of endosulfan to the particulate phase. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:620 / 626
页数:7
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