Liquid purification or separation – Processes – Treatment by living organism
Patent
1994-10-27
1996-05-07
Upton, Christopher
Liquid purification or separation
Processes
Treatment by living organism
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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Blowes David W.
Ptacek Carol J.
University of Waterloo
Upton Christopher
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