Antimony (III) Removal from Electrolyte of Sarcheshmeh Copper Complex Refinery Using CEC۳۷۰ and Purolite S۹۵۷ Resins

The major goal of electric copper refinement is to manufacture high-purity cathode copper and minimize development expenditures. Elements (Bi, As, and Sb) have an adverse impact on the consistency of the ultimate cathode. Antimony is the key element in the moving sludge formation during the electrolysis phase. With increasing the electrolysis time, the antimony content in the electrolyte and the cathode-based antimony toxicity rise. In this research, CEC۳۷۰ and Purolite S۹۵۷ resins were used to isolate antimony (III) from the electrolyte. To evaluate the kinetics of the mechanism in static (discrete) conditions, pseudo-first and second-order, interparticle diffusion, and Elovich models were used. The results demonstrate that the pseudo-second-order model, with the greatest correlation coefficient (for CEC۳۷۰ resin R۲=۰.۹۹۱ and for Purolite S۹۵۷ resin R۲=۰.۹۹۷), can better estimate the kinetics of adsorption processes for both CEC۳۷۰ and Purolite S۹۵۷ resins. Furthermore, the results of the control phase of the ion exchange mechanism through the intraparticle diffusion models revealed that the phase of antimony (III) ions' arrival at the adsorbent film occurred at the highest rank. This may be triggered mostly by the agitation of the solution. The slope of the rating diagram (interparticle diffusion models) of CEC۳۷۰ resin suggests is smaller adsorption rate compared to Purolite S۹۵۷ resin. The saturation phase of Purolite S۹۵۷ resin was achieved upon moving around ۱۶ liters of electrolyte over the resin, and the saturation phase of CEC۳۷۰ resin was achieved after moving about ۱۰ liters of electrolyte over the resin in the ongoing process of antimony (III) elimination from the electrolyte (comprising ۲۸۶ ppm antimony).

کلیدواژه ها:

kinetic modeling ، Antimony ، Sarcheshmeh Copper Complex Refinery ، CEC۳۷۰ resin ، Purolite S۹۵۷ resin