Question

Which of the following resin can be used to remove copper plating rinse water?

(a) ResinTech’s CG-8 (Na)

(b) ResinTech’s CG-8 (K)

(c) ResinTech’s CP-8 (Na)

(d) ResinTech’s PG-8 (Na)

The question was posed to me during a job interview.

Query is from Chemical Treatment in portion Chemical, Physical & Biological Treatment of Hazardous Waste Management

Answer 1

Right option is (a) ResinTech’s CG-8 (Na)

Easiest explanation: A strongly acidic cation exchanger in the sodium form, ResinTech’s CG-8 (Na) can be used to remove the copper and it will also remove calcium and magnesium in water.