초록 ▼

A process for decontaminating a metal contaminated soil aggregate wherein at least one water soluble dialkyldithiocarbamate is admixed with an initial soil slurry so as to obtain a product aqueous soil slurry comprising one or more water insoluble metal-dialkyldithiocarbamate complexes which insolub

A process for decontaminating a metal contaminated soil aggregate wherein at least one water soluble dialkyldithiocarbamate is admixed with an initial soil slurry so as to obtain a product aqueous soil slurry comprising one or more water insoluble metal-dialkyldithiocarbamate complexes which insoluble complexes may then be physically separated from the soil slurry to leave behind a product having a metal contamination level lower than that of the initial contaminated soil.

대표청구항 ▼

[ I claim:] [1.] A process for decontaminating a metal contaminated soil aggregate so as to obtain a product comprising a treated soil component having a metal content lower than that of the metal contaminated soil aggregate, said metal contaminated soil aggregate comprising at least one metal selec

[ I claim:] [1.] A process for decontaminating a metal contaminated soil aggregate so as to obtain a product comprising a treated soil component having a metal content lower than that of the metal contaminated soil aggregate, said metal contaminated soil aggregate comprising at least one metal selected from the group comprising Pb, Hg, Cu, Cd, Zn, Ag, Ni, Co, Ga and Cr, said contaminated soil aggregate comprising a classified soil fraction representing soil particles having a size of from 0.15 mm and smaller, said process comprisingproviding an initial aqueous soil slurry comprising said metal contaminated soil aggregate;admixing at least one water soluble dialkyldithiocarbamate with said initial aqueous soil slurry so as to obtain a product aqueous soil slurry comprising one or more water insoluble metal-dialkyldithiocarbamate complexes, each of said water insoluble metal-dialkyldithiocarbamate complexes comprising a metal moiety; andseparating one or more of said insoluble metal-dialkyldithiocarbamate complexes from said product aqueous soil slurry so as to obtain a treated aqueous slurry comprising a treated soil component having a metal content lower than that of said metal contaminated soil aggregate, and rein the metal moiety of each of said one or more water insoluble metal-dialkyldithiocarbamate complexes is a member of the group comprising Pb, Hg, Cu, Cd, Zn, Ag, Ni, Co, Ga and Cr.