Effect of physical-chemical properties of chlorobenzenes and PAHs in competitive displacement processes

GEOC 50

Isabel R. Faria, irfaria@ucdavis.edu, Department of Civil and Environmental Engineering, University of California - Davis, One Shields Av, Davis, CA 95616 and Thomas Young, Department of Civil and Environmental Engineering, University of California Davis, One Shields Ave., Davis, CA 95616.
The long-term contact of hydrophobic compounds with soil often leads to progressive immobilization of the compounds but the presence of a competing solute may counteract or reverse this process, increasing contaminant mobility, bioavailability and associated risk. It is thought that competitive effects occur within the hard carbon domain of natural organic matter (NOM), although controls on this process are still not well understood. Understanding processes such as competition, aging and biodegradation that influence contaminant release from soil is vital to estimate remediation rates and endpoints and to select remediation strategies. The competition between 1,2-dichlorobenzene and other hydrophobic organic chemicals was systematically investigated in a binary system over a wide range of concentration of competitors using sorbents with different diagenetic properties. The objective was to determine the effect of the competitors' physical-chemical properties on the rate and extent of bound contaminant displacement.
 

General Poster Session
7:00 PM-9:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Division of Geochemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006