Process for removal of heavy metal contamination in waste water

Details Process for removal of heavy metal contamination in waste water Process for removal of heavy metal contamination in waste water

1987-05-15

1988-05-24

Wyse, Tom

Liquid purification or separation

Processes

Ion exchange or selective sorption

210912, 210913, C02F 142

Patent

active

047464399

ABSTRACT:
Alkaline earth silicate solids with a surface area in the range of about 0.1-1000 m.sup.2 /g are used to remove Ag, Pb, Zn, Ni, and Cr (III) metal ions from contaminated waste waters. The foregoing metal ions are removed from the contaminated waste waters by a process involving the steps of contacting the contaminated waste waters at a pH in the range of 4 to 6 with the alkaline earth silicate solid and thereafter filtering the alkaline earth silicate solid from the contaminated waste waters to remove the metal ions.

REFERENCES:
patent: 2640756 (1953-06-01), Wills
patent: 4210530 (1980-06-01), Etzel et al.
patent: 4508742 (1985-04-01), McLaughlin et al.
patent: 4530765 (1985-07-01), Sabherwal

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