METHOD FOR COMPLETELY DECHLORINATING ORGANIC CHLORINE COMPOUND SUCH AS TRICHLOROETHYLENE OR TETRACHLOROETHYLENE IN/ON GROUND BY GENERATING HYDROGEN BY CHEMICAL REACTION BY USING RANEY NICHEL AS REDUCTION CATALYST

摘要

PROBLEM TO BE SOLVED: To surely make an organic chlorine compound such as trichloroethylene or tetrachloroethylene harmless in/on the ground.;SOLUTION: The organic chlorine compounds such as trichloriethylene or tetrachloroethylene is dechlorinated in/on the ground by generating hydrogen by a chemical reaction by using Raney nickel as a reduction catalyst. Soil or ground water contaminated with an aqueous medium containing the poisonous organic chlorine compound such as trichloroethylene or tetrachloroethylene is mixed/agitated with or injected into the catalyst (Raney nickel), an alkali aqueous solution (sodium hydroxide solution, calcium hydroxide solution, etc.), and a metal producing hydrogen by a base (aluminum, tin, etc). Hydrogen is generated in the contaminated soil. The elimination of chloride ions is attempted and decomposition is done.;COPYRIGHT: (C)2005,JPO&NCIPI