초록 ▼

This invention relates to thermo-chemical remediation and decontamination of sediments and soils contaminated with organic contaminants as well as inorganic materials with subsequent beneficial reuse. Novel environmentally stable products of commercial value are produced when certain additives such

This invention relates to thermo-chemical remediation and decontamination of sediments and soils contaminated with organic contaminants as well as inorganic materials with subsequent beneficial reuse. Novel environmentally stable products of commercial value are produced when certain additives such as calcium and metal oxides are mixed with the contaminated materials. In the process, the mixture is heated to 1150.degree. C..about.1500.degree. C. to produce a molten reaction product with at least part of an excess amount of oxygen mixture or air is continuously bubbled through the melt in order to provide mixing and achieve high thermal destruction and removal efficiencies of the organic contaminants. The melt is then quickly quenched in moist air, steam, or water to avoid the transformation of the amorphous material into crystals. The inorganic contaminants such as chromium, nickel, zinc, etc. are incorporated and completely immobilized within the amorphous silicate network. The amorphous material can be pulverized to yield a powder which evinces cementitious properties either by reaction with alkali solution or by blending it with other materials to produce blended cements. The compressive strengths of the concretes made from the powder of the subject invention and blends thereof are comparable to, or greater than the A

대표청구항 ▼

[ What is claimed:] [1.] A process for the thermo-chemical remediation and decontamination of contaminated materials comprising sediments and soils contaminated with organic materials, inorganic materials and heavy metals comprising the steps of:a) combining said contaminated materials with a calciu

[ What is claimed:] [1.] A process for the thermo-chemical remediation and decontamination of contaminated materials comprising sediments and soils contaminated with organic materials, inorganic materials and heavy metals comprising the steps of:a) combining said contaminated materials with a calcium oxide source, alumina, ferric oxides and fluxing agent to form a mixture;b) heating the mixture to produce a molten reaction product;c) bubbling oxygen through the heated mixture for destruction of said organic material;d) quenching the melt in the presence of moist air, steam or water to form an amorphous material, and thereby immobilizing the inorganic contaminants and the heavy metals;e) pulverizing the amorphous material to form a reactive melt product powder;f) blending the powder with cement to yield a blended cement.