Method of selectively removing selenium ions from an aqueous sol

Details Method of selectively removing selenium ions from an aqueous sol Method of selectively removing selenium ions from an aqueous sol

1987-09-01

1989-02-21

Cintins, Ivars

Liquid purification or separation

Processes

Using magnetic force

210717, 210719, 210902, C02F 148, C02F 170

Patent

active

048062642

ABSTRACT:
A method of selectively removing selenium ions from an aequeous solution containing selenium ions comprises contacting the solution with an amount of ferrous ion effective to reduce the selenium ions to elemental selenium. The contacting is preferably conducted at a pH of about 9 and the ferrous ions are preferably provided in situ in the form of ferrous hydroxide. The method may further comprise removing ferric oxides to which the ferrous ions are oxidized, these ferric oxides containing the elemental selenium produced by the reduction of the selenium ions, and separating the ferric oxides from the elemental selenium by adding a strong acid thereto.

REFERENCES:
patent: 3084994 (1963-04-01), Yomiyama et al.
patent: 3933635 (1976-01-01), Marchant
patent: 4026797 (1977-05-01), Nikolic et al.
patent: 4405464 (1983-09-01), Baldwin et al.

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