how to recover copper from waste water?

Question

we have 20% aluminium chloride solution containing copper salt.i want to recover this copper salt

Answer 1

First look at the color of your solution, if it does not have an obvious bright blue tint to it you are not going to precipitate enough out to even worry about. Second you are going to run into the problem that copper compounds are more soluble than aluminum ones, meaning that you are more likely going to remove the aluminum from your solution. Now that I have told you that It is possible to recover a minimal amount of your copper back, not enough to worry about though by taking the pH of the solution to extreme alkaline or acid, I'd reccomend taking it to extreme acid for the next step. Now add a compound known as Ammonium Sulfide (NH4)2S, yes it will stink very much like rotting eggs, so do this in a well ventilated area; the black precipitate on the bottom of the vessel should be Copper Sulfide with Aluminum Sulfide mixed in.

Answer 2

Acid is used to remove copper from aqueous solutions.

Answer 3

u can use biochemical or biotechnological methods