Water treatment process

Details Water treatment process Water treatment process

1992-06-04

1993-08-17

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210728, 210747, 210749, 210911, C02F 152

Patent

active

052365999

ABSTRACT:
Acid water containing toxic levels (>0.1 ppm) of aluminum is treated to dissolve therein both silicate ions in an amount to create a solution containing at least 40, preferably at least 100, micromoles per liter of silicon and a silicon:aluminum ratio (based on metals) of at least about 6:1 and preferably 10:1 in the water to form a non-toxic complex with aluminum and alkali or alkali metal ions to increase the pH of the water. The preferred treatment agent is a hydraulic calcium silicate, in the form of cement clinker, optionally silicate-enriched with a soluble silicate.

REFERENCES:
patent: 4404105 (1983-09-01), Rysman de Lockerente et al.
patent: 4664809 (1987-05-01), Fenton et al.
patent: 4822579 (1989-04-01), Wagner
Willey, "Reactions Which Remove Dissolved Alumina from Sea Water", Chemical Abstracts, Jul. 12, 1976, vol. 85 No. 2, p. 305, Abstract No. 10120h.
Neal et al., "Towards Establishing Aluminum Hydroxy Silicate Solubility Relationships for Natural Waters", Chemical Abstracts, May 2, 1988, vol. 108, No. 18, p. 361, Abstract No. 156029a.

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