Removal from industrial wastewaters of metals that form sparingl

Details Removal from industrial wastewaters of metals that form sparingl Removal from industrial wastewaters of metals that form sparingl

1992-08-26

1994-05-03

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210728, 210912, 210914, C02F 162

Patent

active

053085000

ABSTRACT:
Metals that form sparingly soluble sulfides are removable from industrial wastewaters by adding a precipitant comprising a suspension obtained by mixing sulfur, an iron(II) salt, water and a base, adjusting the wastewater pH to >4, and separating off the resulting sulfidic precipitate in a conventional manner.

REFERENCES:
patent: 3740331 (1973-06-01), Anderson
patent: 4102784 (1978-07-01), Schlauch
patent: 4422943 (1983-12-01), Fender et al.
patent: 4940549 (1990-07-01), Olsen et al.
patent: 5200082 (1993-07-01), Olsen et al.
Database WPIL, AN-76-50918X, & JP-A-51 057 687, May, 21 1976.

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