Abstract
The present study attempts to investigate the chloride removal from industrial soils and zinc slag in zinc production companies. The presence of chloride in factory’s samples causes some problems such as the anode erosion in electrolysis cells, negative effects on the quality of zinc sheets, and reducing the quality of product. Having said that, decreasing the amount of chloride ion will make it possible to produce zinc sheets with SHG quality. There are different methods that can be used to decrease the amount of chloride ion, and one of them has been practiced in this study. A hydrometallurgy method uses sodium metabisulfite and copper(II) sulfate in which Cl− reacts with Cu+ to form CuCl precipitate and removes the chloride content. The parameters pH, temperature, time, and the consumed ratio of copper(II) sulfate to sodium metabisulfite were investigated. Once optimal values of these parameters were calculated, the efficiency of chloride removal from NaCl solution with a value of 57% and the obtained solution from slag leach with a value of 2.6% were evaluated as inefficient.
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