System for treating contaminated groundwater

Liquid purification or separation – Processes – Treatment by living organism

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Details

210719, 210720, 210721, 210747, C07F 158

Patent

active

055142796

ABSTRACT:
A system for treating groundwater contaminated with acidity or other contaminants is disclosed. The system involves excavating a trench into the aquifer in the path of the contaminant plume, and placing a body of active material in the trench. The active material depends on the particular contaminant: organic carbon may be used when the contaminant is ferrous sulphate, or hexavalent uranium oxide, or dissolved nitrate; pyrite or elemental iron may be used when the contaminant is eg chromium oxide. The active material causes the contaminant, by chemical reaction, to change its oxidation-reduction state, and to precipitate harmlessly in the body of material.

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patent: 4839051 (1989-06-01), Higa
patent: 5057227 (1991-10-01), Cohen
patent: 5266213 (1993-11-01), Gillham
patent: 5330651 (1994-07-01), Robertson
"New Approach to In-Situ Treatment of Contaminated Groundwaters" D. C. McMurtry + R. O. Elton Publication Journal: Environmental Progress (vol. 4, No. 3), Aug. 1985.
Nirei et al. "Management of Environmental Resources and Development of the Kanto Paleo Submanic Basin", 29th IGC Field Trip, pp. A12.1-A12.34, 1992.

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