Aluminum Reclamation by Acidic Extraction of Aluminum-Anodizing Sludges

Extraction of aluminum-anodizing sludges with sulfuric acid was examined to determine the potential for production of commercial-strength solutions of aluminum sulfate, that is liquid alum. This research establishes kinetic and stoichiometric relationships and evaluates product quality. Detailed mat...

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Bibliographic Details
Published in:Journal - Water Pollution Control Federation 1988-03, Vol.60 (3), p.369-378
Main Authors: Saunders, F. Michael, Shaw, Randall C.
Format: Article
Language:English
Subjects:
Aluminum
Anodizing
Applied sciences
Exact sciences and technology
Hydroxides
Liquids
Other industrial wastes. Sewage sludge
Pollution
Sludge
Solids
Sulfuric acids
Temperature control
Tin
Wastes
Wastewater
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Summary:Extraction of aluminum-anodizing sludges with sulfuric acid was examined to determine the potential for production of commercial-strength solutions of aluminum sulfate, that is liquid alum. This research establishes kinetic and stoichiometric relationships and evaluates product quality. Detailed material-balance data were collected to monitor the progress and extent of extractions. The production of a commercial-strength liquid alum was feasible. Issues relative to product quality indicate that segregation of certain metal containing wastes may be required for selected aluminum-finishing wastes.
ISSN:0043-1303
2327-7467