Selective removal of copper from the artificial nickel electrolysis anolyte by a novel chelating resin: batch, column and mechanisms. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Qiu, Xuejing; Hu, Huiping; Yang, Jinpeng; Wang, Caixia; Cheng, Zeying
• Is Part Of: Journal of dispersion science and technology. Volume 41:Issue 1(2020)
• Page Start: 137
• Page End: 147
• Publication Date: 2020-01-02
• Subjects: Synthesis -- chelating resin -- selective adsorption -- copper removal -- artificial nickel electrolysis anolyte; Emulsions -- Periodicals; Suspensions (Chemistry) -- Periodicals; Emulsions; Suspensions; 541.34
• DOI: 10.1080/01932691.2018.1561299
• Languages: English
• ISSNs: 0193-2691

Abstract

Abstract: The selective removal of copper from the artificial nickel electrolysis anolyte was presented with a novel N-octyl-2-aminomethylpyridine-funcionalized chelating resin (abbreviated as CP-AMPO) in this study. In the single system, the adsorption characters of the CP-AMPO resins for Cu 2+ and Ni 2+ were examined through pH of solution, concentration of metal ions, contact time and temperature. Through the experimental investigation, the isotherm adsorption behavior of Cu 2+ fitted well with Langmuir isotherm, whereas the adsorption behavior of Ni 2+ followed the Langmuir and the Freundlich isotherm. The kinetic adsorption parameters were proved to be in agreement with the pseudo-second kinetic model, the thermodynamics data demonstrated the adsorption behaviors of Cu 2+ and Ni 2+ were a spontaneous and endothermic process. Additionally, from the competitive adsorption in the binary systems, the separation factor of copper/nickel reached 2000, indicating higher selectivity for copper over nickel. Moreover, the residual concentration of copper was less than 3 mg/L at the beginning of 8 BV in the artificial nickel electrolysis anolyte after purification and the mass ratio of copper/nickel exceeded 15 in the saturated resins by the dynamic adsorption curves. The results could well satisfy the production requirement of the nickel electro-refining procedure. Therefore, the CP-AMPO resins could be used as the high-performance adsorbent to remove copper from the nickel electrolysis anolyte in the large-scale industry. Consequently, the extended study of the chelating resin on the mechanisms of selective adsorption for copper and nickel was assessed by X-ray photoelectron spectroscopy (XPS). Graphical Abstract: