Method for removing heavy metal ions from contaminated water and

Details Method for removing heavy metal ions from contaminated water and Method for removing heavy metal ions from contaminated water and

1990-03-15

1992-02-11

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210653, 210654, 21050023, 21050027, 21050035, 210912, B01D 6100, B01D 3321

Patent

active

050873725

ABSTRACT:
A method for simultaneously removing a plurality of different heavy metal ions from contaminated water is disclosed. A plurality of different heavy metal ions can be simultaneously, efficiently removed by filtering contaminated water through a porous membrane comprising a membranous, porous resin matrix and a plurality of side chains chemically bound to both surfaces and pore wall surfaces of the matrix, which side chains each have a chelate group, preferably an iminodiacetic acid group, and terminating the filtration when the concentration of a determinant heavy metal ion in the filtrate reaches a predetermined level. By the method of the present invention, a plurality of different heavy metal ions, such as a cobalt ion and a nickel ion, can be simultaneously, efficiently removed from contaminated water, such as water to be used for and waste water from a nuclear power generator, on a commercial scale.

REFERENCES:
patent: 3872001 (1975-03-01), Davis et al.
patent: 3957504 (1976-05-01), Ho et al.
patent: 4741831 (1988-03-01), Grinstead

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