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Zinc electrowinning is the main process step of hydro-electrometallurgical route for both from primary and secondary sources and about 80% of the world zinc production is carried out by this technique [1,2].Reduction electrolysis of zinc is extremely sensitive to the impurities present in the electrolyte.Thus, the process requires a very pure electrolyte with an approximate composition of 65-70 g/1 Zn2+ and 120-180 g/1 H2SO4.