Reduction of metal content of treated effluents

Details Reduction of metal content of treated effluents Reduction of metal content of treated effluents

1981-11-19

1986-11-25

Wyse, Thomas

Liquid purification or separation

Processes

Ion exchange or selective sorption

210714, 210724, 210912, C02F 164

Patent

active

046247904

ABSTRACT:
The residual metal content of tightly chelated heavy metal-containing effluents is reduced by carrying out a sulfide precipitation process in the presence of a seed material comprising an added unchelated soluble heavy metal salt, preferably with an adjustment of pH to at least above about 9.0, with optional variations including passage through a mixed filter media comprising at least two particulate ingredients and regeneration of the used filter media.

REFERENCES:
patent: 3740331 (1973-06-01), Anderson et al.
patent: 4362629 (1982-12-01), Senda et al.
Kim, "Treatment of Metal Containing Wastewater by Sulfide Precipitation," Presented at AICHE 73rd Annual Meeting, Chicago, Ill., Nov. 16-20, 1980.

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