Removal of heavy metals from waste water

Details Removal of heavy metals from waste water Removal of heavy metals from waste water

1986-07-22

1988-03-15

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210720, 210725, 210727, 210912, 210913, 210914, C02F 154

Patent

active

047311878

ABSTRACT:
A heavy metal can be removed from waste water, in which the metal is contained as ions, by adding to the waste water a metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide to form a metal ion containing floc. The resulting floc is then removed from the waste water by filtration. The metal scavenger contains at least one carbodithio group and/or at least one carbodithioate salt group as N-substituents per molecule.

REFERENCES:
patent: 3981965 (1976-09-01), Ganey et al.
patent: 4530765 (1985-07-01), Sabherwal
Kim, B. M. "Treatment of Metal Containing Wastewater by Sulfide Precipitation" General Electric Company, AIChE 73rd Annual Meeting, Chicago, Ill., Nov. 1980, pp. 1-12.

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