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Environ Pollut

Title:		Summer-winter concentrations and gas-particle partitioning of short chain chlorinated paraffins in the atmosphere of an urban setting
Author(s):		Wang T; Han S; Yuan B; Zeng L; Li Y; Wang Y; Jiang G;
Address:		"State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China"
Journal Title:		Environ Pollut
Year:		2012
Volume:		20120804
Issue:
Page Number:		38 - 45
DOI:		10.1016/j.envpol.2012.07.025
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Short chain chlorinated paraffins (SCCPs) are semi-volatile chemicals that are considered persistent in the environment, potential toxic and subject to long-range transport. This study investigates the concentrations and gas-particle partitioning of SCCPs at an urban site in Beijing during summer and wintertime. The total atmospheric SCCP levels ranged 1.9-33.0 ng/m(3) during wintertime. Significantly higher levels were found during the summer (range 112-332 ng/m(3)). The average fraction of total SCCPs in the particle phase (varphi) was 0.67 during wintertime but decreased significantly during the summer (varphi = 0.06). The ten and eleven carbon chain homologues with five to eight chlorine atoms were the predominant SCCP formula groups in air. Significant linear correlations were found between the gas-particle partition coefficients and the predicted subcooled vapor pressures and octanol-air partition coefficients. The gas-particle partitioning of SCCPs was further investigated and compared with both the Junge-Pankow adsorption and K(oa)-based absorption models"
Keywords:		"Air Pollutants/*analysis Air Pollution/statistics & numerical data Atmosphere/*chemistry China Cities/statistics & numerical data *Environmental Monitoring Hydrocarbons, Chlorinated/*analysis Paraffin/*analysis Seasons Volatile Organic Compounds/analysis;"
Notes:		"MedlineWang, Thanh Han, Shanlong Yuan, Bo Zeng, Lixi Li, Yingming Wang, Yawei Jiang, Guibin eng Research Support, Non-U.S. Gov't England 2012/08/08 Environ Pollut. 2012 Dec; 171:38-45. doi: 10.1016/j.envpol.2012.07.025. Epub 2012 Aug 4"