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Environ Sci Technol

Title:		"Soil burdens of persistent organic pollutants: their levels, fate, and risks. Part iv. Quantification of volatilization fluxes of organochlorine pesticides and polychlorinated biphenyls from contaminated soil surfaces"
Author(s):		Koblizkova M; Ruzickova P; Cupr P; Komprda J; Holoubek I; Klanova J;
Address:		"RECETOX, Research Centre for Environmental Chemistry and Ecotoxicology, Faculty of Science, Masaryk University, Kamenice 3/126, 625 00 Brno, Czech Republic"
Journal Title:		Environ Sci Technol
Year:		2009
Volume:		43
Issue:		10
Page Number:		3588 - 3595
DOI:		10.1021/es9003944
ISSN/ISBN:		0013-936X (Print) 0013-936X (Linking)
Abstract:		"A volatilization chamber, designed for direct measurements of the soil-air exchange of persistent organic pollutants (POPs) was applied for determination of the volatilization fluxes of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs). The volatilization fluxes were determined for 13 model compounds at 3-5 concentration levels, for two soil organic carbon contents, and two wind velocities. The flux values were strongly correlated with physicochemical properties of the compounds. The higher fluxes were measured for soils with lower organic carbon contents, for higher contamination, and higher wind velocities. Experimentally derived values were compared to those predicted by the fugacity model. In general, the fugacity model underestimated the volatilization fluxes, especially for the compounds with higher molecular weights, and soils with higher organic carbon contents. It has been demonstrated that variability of the wind velocities as an important parameter for quantification of the soil-air exchange should be better considered in current models. Presented results draw the attention to often overlooked secondary sources of the atmospheric pollution and point out that their impact can be much greater than indicated by the fugacity models"
Keywords:		"Models, Chemical Pesticides/*analysis Polychlorinated Biphenyls/*analysis Risk Factors Soil/*analysis Soil Pollutants/*analysis Temperature Time Factors Volatilization;"
Notes:		"MedlineKoblizkova, Martina Ruzickova, Petra Cupr, Pavel Komprda, Jiri Holoubek, Ivan Klanova, Jana eng Research Support, Non-U.S. Gov't 2009/06/24 Environ Sci Technol. 2009 May 15; 43(10):3588-95. doi: 10.1021/es9003944"