PROCESS FOR REDUCING THE CONCENTRATION OF DISSOLVED METALS AND METALLOIDS IN AN AQUEOUS SOLUTION

PROCESS FOR REDUCING THE CONCENTRATION OF DISSOLVED METALS AND METALLOIDS IN AN AQUEOUS SOLUTION

An aqueous solution, for example, effluent from an off-gas scrubber, is treated to remove metal and metalloid ions by in situ precipitation of ferrous ions by the addition thereto of a ferrous ion-containing solution, salt or other such ferrous ion-containing source and a hydroxyl-yielding base in t...

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Bibliographische Detailangaben
1. Verfasser: BRIAN CHARLES BLAKEY
Format: Patent
Sprache:eng ; spa
Schlagworte:
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:An aqueous solution, for example, effluent from an off-gas scrubber, is treated to remove metal and metalloid ions by in situ precipitation of ferrous ions by the addition thereto of a ferrous ion-containing solution, salt or other such ferrous ion-containing source and a hydroxyl-yielding base in the presence of the metals and metalloids. The reaction conditions include a temperature of at least about 60° C., and a pH of from about 6 to about 10.