Comparison of Solvents for Ex Situ Removal of Chromium and Lead from Contaminated Soil

摘要

Soil washing is one of few practical methods for the remediation of metal-contaminated soils. Eth- ylenediaminetetraacetic acid (EDTA, 0.1, 0.01, 0.001. 0.0001 M); nitrilotriacetic acid (NTA, 0.1 and 0.01 M), sodium dodecyl sulfate (SDS, 0.1 and 0.001 M); and HCl (0.25 to 8/100 v/v) were compared, in batch studies, for their ability to solubilize chromium (Cr) and lead (Pb) from a contaminated soil (Cr_tot = 4940 mg/kg; Pb_tot = 1300 mg/kg; pH = 10.3) collected from an abandoned industrial facility. The EDTA, NTA, and SDS were reacted with the soil over a wide pH range.