Recycle process for removing dissolved heavy metals from water w

Details Recycle process for removing dissolved heavy metals from water w Recycle process for removing dissolved heavy metals from water w

1995-02-10

1996-08-13

McCarthy, Neil

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210719, 210722, 210911, 210912, 210913, 210914, C02F 162, C02F 170

Patent

active

055453317

ABSTRACT:
Heavy metal ions react with iron particles in acidic aqueous solution to form heavy metallic particles that are suitable for recycling and reuse when recovered from the aqueous solution. Chelating agents that are present are deactivated by bonding to ferrous ions produced from the iron particles. An alkali metal hydroxide is utilized to precipitate remaining heavy metal ions including ferrous and ferric ions which are recycled to the acidic aqueous solution.

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patent: 4599177 (1986-07-01), Hayashi et al.
patent: 4606829 (1986-08-01), Rice et al.
patent: 5102556 (1992-04-01), Wong
patent: 5122279 (1992-06-01), Guess
patent: 5133873 (1992-07-01), Catlin et al.
patent: 5298168 (1994-03-01), Guess
patent: 5389262 (1995-02-01), Guess

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