LEACHING COMPARISON OF SELECTED MISSISSIPPI SOILS CONTAMINATED WITH ORGANIC AND INORGANIC WOOD PRESERVATIVES

摘要

Desorption of pentachlorophenol (PCP), and chromated copper arsenic (CCA) from five Mississippi soil regions was studied. The soils tested were Blackland Prairie (Dorman), the Interior Flatwoods (Winston), the Delta, the Coastal Plains (Wiggins) and the Loess soil (Raymond). Soils were contaminated with 500 ppm and lOOOppm PCP and 1000 ppm for CCA respectively. Toxicity Characteristic Leaching Procedure (TCLP) results revealed that the Wiggins soil desorption level for 500 and 1000 ppm PCP contaminated soils was significantly higher than other soil types. Dorman and Raymond soils leached the most copper and chromium. Dorman soil leached the highest arsenic level among CCA treated soils, while Winston soil consistently leached the least concentration of these metals.