國家衛生研究院 NHRI:Item 3990099045/2425

NHRI > National Institute of Environmental Health Sciences > Kuen-Yuh Wu(2001-2008) > Periodical Articles > Item 3990099045/2425

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Title:	Approaching gas-particle partitioning equilibrium of atmospheric PCDD/Fs with increasing distance from an incinerator: measurements and observations on modeling
Authors:	Chao, MR;Hu, CW;Chen, YL;Chang-Chien, GP;Lee, WJ;Chang, LW;Lee, WS;Wu, KY
Contributors:	Division of Environmental Health and Occupational Medicine
Abstract:	A comprehensive sampling campaign was carried out around a municipal solid waste incinerator (MSWI) in central Taiwan in order to evaluate the impact of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) emissions on the ambient air and describe their spatial variation of gas-particle partitioning. Stack flue gas samples from the MSWI were also analyzed to investigate the relationship between the source and the impacted sites. Results showed that the PCDD/F emissions from the MSWI were a major source for PCDD/Fs in the ambient air. Moreover, PCDD/Fs in the ambient air tended to be distributed between the gaseous and particulate phases based on molecular weight; the higher chlorinated congener occupied a higher particulate fraction. There was an increase in the proportion of particle-bound PCDD/Fs with increasing distance from the MSWI. This observation supports the assumption that PCDD/Fs emitted were initially more associated with gaseous phase and the gaseous PCDD/Fs would gradually migrate to particles via either adsorption or absorption process. The results obtained were also applied and compared with the subcooled liquid vapor pressure (P-L(0))-based model and with the octanol-air partition coefficients (K-oa)-based model. These two models were found to be excellent descriptors for the gas-particle partitioning of PCDD/Fs. Regressions for log partition coefficient (K-p) versus log P-L(0) and log K-p versus log K-oa both demonstrated that PCDD/Fs were approaching equilibrium partitioning with increasing distance from the MSWI in the current study. (C) 2003 Elsevier Ltd. All rights reserved.
Keywords:	Environmental Sciences;Meteorology & Atmospheric Sciences
Date:	2004-03
Relation:	Atmospheric Environment. 2004 Mar;38(10):1501-1510.
Link to:	http://dx.doi.org/10.1016/j.atmosenv.2003.11.034
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1352-2310&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000189102100011
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=1142309881
Appears in Collections:	[Kuen-Yuh Wu(2001-2008)] Periodical Articles [Louis W. Chang(1999-2009)] Periodical Articles

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