Situ neutralization of subsurface acidic pore water

Details Situ neutralization of subsurface acidic pore water Situ neutralization of subsurface acidic pore water

2005-09-27

2005-09-27

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

Processes

Including geographic feature

C210S724000, C210S749000, C405S128500, C405S128750

Reexamination Certificate

active

06949197

ABSTRACT:
A method for neutralizing in situ pore water associated with a subsurface waste material body, the pore water having a pH of less than 2, the method includes the steps of adding a non-carbonate alkali to the pore water to produce a pH-modified acidic pore water having a pH between about 4 and about 5; and adding a carbonate alkali to the pH-modified pore water in an amount sufficient to raise the pore water pH to between about 6 and about 8.

REFERENCES:
patent: 5427691 (1995-06-01), Kuyucak et al.
patent: 6254312 (2001-07-01), Chowdhury et al.
patent: 6543964 (2003-04-01), Chowdhury et al.
patent: 2003/0165359 (2003-09-01), Chowdhury et al.
patent: 60248288 (1985-12-01), None
Rehm, W.J., et al., “The Chemical Stabilization of Arsenic and Lead Using EnviroBlend at the Former Ashepoo Fertilizer Works, Charleston, SC,” Second International Conference on Oxidation Toronto Ontario CA (2002).

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