Summary for zinc and nickel from waste Discussion
zinc and nickel from waste solution is the core issue here, and the questioner, Mitra S. from Toronto, asked for a beginner-friendly reference because the electrochemical fundamentals were unfamiliar. The reply recommends checking the site’s booklist and names two accessible references: the Metal Finishing Guidebook and the Electroplating Engineering Handbook. For the actual treatment question, the answer gives a simple rule of thumb: while the wastewater remains acidic, zinc and nickel stay dissolved as salts; when the pH is raised into roughly the 8 to 11 range, both metals precipitate as hydroxides and can then be filtered out. The answer notes this can reduce concentrations to about 1 to 10 ppm. The advice is practical but simplified, so it is presented as a mostly true overview rather than a full treatment design.
Q. Hello,
I have to remove zinc and nickel from waste solution for my project. I am not very familiar with fundamentals and definitions of electrochemical processes. Do you have any idea about a good text book or any reference that I can use. I did not find a good book to understand definitions very well.
Thank you,
Mitra S
student – Toronto, Ontario, Canada
2004
A. Please see our booklist, Mitra. Relatively accessible books include the Metal Finishing Guidebook, the
Electroplating Engineering Handbook ⇦ this on
eBay,
AbeBooks, or
Amazon [affil link]
and Kushner’s
“Water and Waste Control for the Plating Shop” ⇦[this on
eBay,
Amazon,
AbeBooks affil links]. The simplest way to look at it, and which is at least mostly true, is that while the water remains acidic the zinc and nickel stay dissolved as simple salts. But when you raise the pH to 8 to 11 range, the zinc and nickel precipitate as hydroxides and can be filtered out to a concentration in about the 1 to 10 ppm range. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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