Abstract
Abstract Finishing architectural aluminum using caustic etching and sulfuric‐acid anodizing produces voluminous, aluminum‐hydroxide residues for disposal. Implementation of etch recovery systems can reduce total residue volume. Acidic reclamation of conventional and etch‐recovery residues to produce liquid alum can eliminate residue disposal problems. The heavy metal contents of aluminum‐anodizing residues are low and in general meet regulations for metals in potable waters. Concentrations of copper, nickel, tin and zinc should be further monitored or controlled within an anodizing plant, if liquid alum is to be produced.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
