Author/Authors :
Li، P.P نويسنده College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, P. R. China , , Peng، C.S نويسنده College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, P. R. China 2 Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, San Luis Potosi, 78210, C.P. Mexico , , Li، F.M نويسنده College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, P. R. China , , Song، S.X نويسنده Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, San Luis Potosi, 78210, C.P. Mexico , , Juan، A.O نويسنده College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, P. R. China ,
Abstract :
In this work, we developed a method which combined the processes of acid-leaching, ammonium
jarosite precipitating and electro-depositing to recover copper and nickel from electroplating sludge. Residual
sludge from an electroplating plant located in Qingdao was used for acid-leaching, and more than 95% of
copper, nickel, zinc, chromium and iron were extracted from the sludge. After acid-leaching, the extracted
solution was put into an electrolytic cell for copper recovery by electro-depositing process, and about 95% of
copper was recovered under the optimized operation parameters such as cell voltage, pH and electrode
material. After copper recovery, the extracted solution was treated with ammonium jarosite precipitating
process. About 99% of chromium and iron could be deposited as chromium ferrite in this process. Finally, the
left solution was treated with electro-depositing process again for nickel recovery, and about 57% of nickel
could be recovered in this process under the condition of pH 5.5 and voltage 5.5V.
