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Environ Monit Assess

Title:		Soil-water partitioning and desorption hysteresis of volatile organic compounds from a Louisiana Superfund site soil
Author(s):		Kommalapati RR; Valsaraj KT; Constant WD;
Address:		"Department of Civil Engineering, Prairie View A and M University, Texas, USA"
Journal Title:		Environ Monit Assess
Year:		2002
Volume:		73
Issue:		3
Page Number:		275 - 290
DOI:		10.1023/a:1013190302163
ISSN/ISBN:		0167-6369 (Print) 0167-6369 (Linking)
Abstract:		"The adsorption and desorption of three volatile organic compounds (1,2-dichloroethane, 1,1,2- trichloroethane and 1,1,2,2-tetrachloroethane) from a previously uncontaminated clayey soil sample from a Superfund site in North Baton Rouge, Louisiana was studied. In the linear range of the adsorption isotherm, the partition constants were not affected by the presence of the co-solutes. The adsorption isotherms over a wide concentration range on the soil followed the nonlinear Freundlich isotherm. The desorption of the compounds showed significant hysteresis at all concentrations studied. Approximately 20 to 70% of the adsorbed mass of organic compounds resisted the desorption even after five months of successive desorption steps. The desorption of four compounds (1,2-dichloroethane, 1,1,2-trichloroethane, 1,4-dichlorobenzene and hexachlorobutadiene) from a contaminated soil sample from the same site was also studied. The aqueous concentration declined as the successive desorption steps progressed. For hexachlorobutediene the desorption can be visualized as occurring in two stages. The first stage involved a 'loosely bound' or 'reversible' fraction and the second stage involved a 'tightly bound' or 'resistant' fraction"
Keywords:		"Adsorption Environmental Monitoring Ethane/*analogs & derivatives/*analysis Ethylene Dichlorides/*analysis *Hazardous Waste Hydrocarbons, Chlorinated/*analysis Soil Pollutants/*analysis Trichloroethanes/*analysis Volatilization;"
Notes:		"MedlineKommalapati, R R Valsaraj, K T Constant, W D eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Netherlands 2002/03/07 Environ Monit Assess. 2002 Feb; 73(3):275-90. doi: 10.1023/a:1013190302163"