Impurity Purification Before Electrowinning

Kaya M.

in: Recycling Technologies for Secondary Zn-Pb Resources, Muammer Kaya, Editor, Springer, London/Berlin , New York, pp.365-400, 2023

  • Publication Type: Book Chapter / Chapter Research Book
  • Publication Date: 2023
  • Publisher: Springer, London/Berlin 
  • City: New York
  • Page Numbers: pp.365-400
  • Editors: Muammer Kaya, Editor
  • Eskisehir Osmangazi University Affiliated: Yes


This chapter covers the impurity removal techniques before electrowinning. Alkaline hydraulic NaOH precipitation, Zn dust cementation, and Na2S precipitation can be used to purify ZnSO4 and PbSO4 PLSs. Fe and As impurities can be removed by NaOH + H2O2 hydraulic precipitation at a pH of 3.5. Al, Cu, and Cd can be precipitated at pH: 5.0 using Zn dust. Two-stage separate precipitation performed better impurity removal than combined one-stage precipitation. Na2S precipitation of PbSO4 and Pb brine solution was also covered in detail.