Combined filtration and fixation of heavy metals

Details Combined filtration and fixation of heavy metals Combined filtration and fixation of heavy metals

1991-03-08

1992-04-21

Cintins, Ivars

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210751, 210912, 106624, C02F 1114

Patent

active

051065100

ABSTRACT:
The present invention describes a filter medium and a method of filtering metals from liquids, such as waste water, in which the metals are filtered from the liquids and are chemically fixed in the resulting filter cake in a nonhazardous and nontoxic form so that they may be disposed of in nonhazardous landfills. When all or a portion of the metals are dissolved, they are first precipitated and then filtered and chemically fixed.

REFERENCES:
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patent: 3451944 (1969-06-01), Finch
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patent: 4105459 (1978-08-01), Meta
patent: 4226630 (1980-10-01), Styron
patent: 4460292 (1984-07-01), Durham et al.
patent: 4488908 (1984-12-01), Goodwin
patent: 4518508 (1985-05-01), Conner
patent: 4645605 (1987-02-01), Durham
patent: 4900360 (1990-02-01), Whitescarver et al.
patent: 4948516 (1990-08-01), Fisher et al.
patent: 5008021 (1991-04-01), Conner

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