Enhanced remediation of aqueous compositions contaminated with h

Liquid purification or separation – Processes – Chemical treatment

Patent

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Details

Other Related Categories

210908, 210909, 588206, C02F 170

Type

Patent

Status

active

Patent number

053624025

Description

ABSTRACT:
A process for significantly improving the rate of dehalogenation of aqueous compositions contaminated with halogenated hydrocarbon compounds is disclosed. The process involves admixing the contaminated aqueous composition with metallic iron in the presence of citric acid both in-situ and ex-situ. The use of citric acid as an additive in the reaction substantially increases the rate of iron-induced dechlorination of chlorinated hydrocarbons, such as trichloroethylene.

REFERENCES:
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patent: 4416767 (1983-11-01), Jordan
patent: 4758346 (1988-07-01), Johnson
patent: 5051030 (1991-09-01), Saha et al.
patent: 5093011 (1992-03-01), Friedman et al.
patent: 5096600 (1992-03-01), Hoch
patent: 5273657 (1993-12-01), Nakashima et al.

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