Degradation and Extraction of Organochlorine Pollutants from Environmental Solids under Subcritical Water Conditions

A subcritical water degradation and extraction method was developed to remediate environmental soils contaminated by highly recalcitrant organochlorine pollutants. Hydrogen peroxide used effectively decompose pollutants under conditions. As a optimization study, the static wet oxidation of chlorophenols first performed in with without added hydrogen peroxide. Complete achieved using an oxidant, thus, from sand matrix then attempted. oxidant were within 30 min at 100 °C. We investigated dieldrin, mirex, p,p′-DDD. These pesticides not as easily oxidized chlorophenols, benefit adding only clearly observed 200 Approximately 20% increase noted for each pesticide insecticide this temperature. Unfortunately, difference temperature 250 °C, except some cases, where amount byproducts reduced. Dieldrin p,p′-DDD essentially destroyed while all insecticides completely removed The proposed soil sample DDT. obtained grounds old DDT mixing facility Virginia has been aging several decades. Not 100% removal but also, extracted during process. remediation method, therefore, demonstrates high potential efficient environmentally sound technique detoxification soils.