Process for simultaneously removing lead, copper and mercury fro

Details Process for simultaneously removing lead, copper and mercury fro Process for simultaneously removing lead, copper and mercury fro

1996-06-21

1999-07-06

Suchfield, George

Hydraulic and earth engineering

Soil remediation

In situ contaminant removal or stabilization

210912, 210914, 588236, A62D 300, B09C 102, B09C 108

Patent

active

059190019

ABSTRACT:
A method for treating a quantity of soil contaminated with lead, copper or mercury includes mixing the contaminated soil with an acid, chloride solution, to dissolve the contaminants in the chloride solution. Soil, essentially free of the contaminants, is separated from contaminant-containing chloride solution. Contaminants are precipitated from the contaminant-containing chloride solution by addition of one or more sulfides. Precipitated contaminants are separated from the remaining solution. The remaining solution may treated by adding chloride, acid, ORP adjusting agents and used to treat an additional quantity of soil.

REFERENCES:
patent: 5045240 (1991-09-01), Skriba et al.
patent: 5268128 (1993-12-01), Lahoda et al.
patent: 5466426 (1995-11-01), Fristad et al.
patent: 5494649 (1996-02-01), Fristad et al.
patent: 5640701 (1997-06-01), Grant et al.
patent: 5744107 (1998-04-01), Fristad et al.

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