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topic 11669

Electroplating of aluminum from caustic waste stream


 

I have a waste stream containing high concentration of Aluminate in 2% NaOH. I would like to know if it is possible to recover the aluminum from this stream by electroplating technology. Is it possible to do in such aqueous stream? Is it necessary to adjust the pH? What type of additives are necessary? What equipment shall I buy for such process and where?

Anna Alyoshin
biotechnology - Rehovot, Israel


 

Sorry, that one is not going to work, Anna.

Aluminum is an active metal which cannot be electrolytically reduced from a water solution (water separates into hydrogen and oxygen first). Futher, aluminum salts are of very low value since aluminum is as common as dirt. Precipitate it, dry it, landfill it.

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



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