Antimony (III) Removal from Electrolyte of Sarcheshmeh Copper Complex Refinery Using CEC370 and Purolite S957 Resins

Document Type : Research Article

Authors

1 Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, I.R. IRAN

2 Hydrometallurgy Department, R&D Center of Sarcheshmeh Copper Complex, Kerman, I.R. IRAN

Abstract

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, CEC370 and Purolite S957 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 CEC370 resin R2=0.991 and for Purolite S957 resin R2=0.997), can better estimate the kinetics of adsorption processes for both CEC370 and Purolite S957 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 CEC370 resin suggests is smaller adsorption rate compared to Purolite S957 resin. The saturation phase of Purolite S957 resin was achieved upon moving around 16 liters of electrolyte over the resin, and the saturation phase of CEC370 resin was achieved after moving about 10 liters of electrolyte over the resin in the ongoing process of antimony (III) elimination from the electrolyte (comprising 286 ppm antimony).

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References

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Iranian Journal of Chemistry and Chemical Engineering
Volume 41, Issue 11 - Serial Number 121
November 2022
Pages 3675-3686

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