Sulfide precipitation of heavy metals from aqueous solutions

Details Sulfide precipitation of heavy metals from aqueous solutions Sulfide precipitation of heavy metals from aqueous solutions

1993-04-22

1994-08-16

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210737, 210912, 210727, 423 87, 4235611, C02F 162

Patent

active

053384601

ABSTRACT:
A process is disclosed for the removal of dissolved heavy metals from aqueous solution contaminated therewith wherein at least one of said heavy metals is reacted with a water-soluble inorganic sulfide or hydrosulfide at a defined elevated temperature and a controlled pH of between about 2 to about 3.5 to thereby precipitate heavy metal sulfide, and thereafter separating the precipitate from the filtrate.

REFERENCES:
patent: 3218161 (1965-11-01), Kunda et al.
patent: 3740331 (1973-06-01), Anderson et al.
patent: 4102784 (1978-07-01), Schlauch
patent: 4338200 (1982-07-01), Zeijlstra
patent: 4503017 (1985-03-01), Gadd et al.
patent: 4652380 (1987-03-01), Wheeler

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