Process for removing heavy metals from solutions with ferrous di

Details Process for removing heavy metals from solutions with ferrous di Process for removing heavy metals from solutions with ferrous di

1994-03-28

1995-02-14

McCarthy, Neil

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210717, 210720, 210724, 210726, 210912, 210913, 210914, 75712, 75714, 75739, C02F 162

Patent

active

053892623

ABSTRACT:
Heavy metal ions react with ferrous dithionite in acidic aqueous solution. They are reduced to metallic particles that are suitable for recycling and reuse when recovered from the acidic water. Chelating agents that are present are deactivated by bonding to the ferrous ions. Ferrous dithionite, (FeS.sub.2 O.sub.4) is either generated in-situ or ferrous ions and dithionite ions can be provided by other methods. An alkali metal hydroxide is utilized to precipitate remaining heavy metal ions including ferrous and ferric ions.

REFERENCES:
patent: 4405464 (1983-09-01), Baldwin et al.
patent: 4956097 (1990-09-01), Courduvelis
patent: 5011610 (1991-04-01), Martin et al.
patent: 5019273 (1991-05-01), Fehsenfeld et al.
patent: 5085836 (1992-02-01), Booker
patent: 5122279 (1992-06-01), Guess
patent: 5133873 (1992-07-01), Catlin et al.
patent: 5298168 (1994-03-01), Guess

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