Method for separation of metals from waste stream
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United States of America Patent
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Sep 26, 1995
Issued Date -
N/A
app pub date -
Sep 8, 1994
filing date -
Jan 15, 1992
priority date (Note) -
Expired
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Abstract
A method for the recovery of metals including zinc, zinc oxide, iron-carbon feedstocks, lead and cadmium from industrial waste streams which entails treating the waste streams with carbon and an ammonium chloride solution, separating any undissolved components from the solution, displacing metal ions including lead and cadmium from the solution using zinc metal, further treating the solution to remove zinc compounds therefrom, further treating the zinc compounds and the undissolved components with a dissolving solution, and further treating the displaced metal ions to recover lead, cadmium and zinc therein using various methods including electrolysis.
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