PARTITION CONSTANTS AND ADSORPTION/DESORPTION HYSTERESIS FOR VOLATILE ORGANIC COMPOUNDS ON SOIL FROM A LOUISIANA SUPERFUND SITE

摘要

The adsorption of four volatile organic compounds (1,4-dichlorobenzene, 1,2-dichloroethane, 1,2,2-trichloroethane and 1,1,2,2,-tetrachloroethane) on three soil types from a Superfund site (Petroprocessors Inc) in Baton Rouge, LA was studied with the purpose of obtaining an overall correlation for inclusion in a groundwater transport model being developed for site remediation. The soil-water partition constant, K_d was determined using a standard ASTM procdure (E-1195-87). Using the data for different soil types (fraction organic carbon between 0.11/100 and 1.13/100) and different mineral surface areas (7 to 45 m~2/g), the organic carbon contribution (K_oc) and the mineral matter contribution (K_min) to the partition constant were determined.