University of Tehran International Journal of Mining and Geo-Engineering 2345-6930 56 3 2022 09 01 Removal of copper ions from dilute sulfuric acid solutions: Effect of solution composition and applied potential 239 247 86278 10.22059/ijmge.2022.329665.594927 EN Saeed Hassani Sadrabadi Mining & Metallurgical Engineering Department, Yazd University, Yazd, Iran 0000-0002-5083-7410 Hojat Naderi Mining & Metallurgical Engineering Department, Yazd University, Yazd, Iran Hamid Reza Zare Department of Chemistry, Yazd University, Yazd, Iran 0000-0003-3890-4331 Seyed Mohammad Moshtaghioun Department of Biology, Yazd University, Yazd, Iran Journal Article 2021 08 29 Removal of copper from synthesized and real dilute sulfuric acid solutions was investigated. Effects of copper, iron concentrations and applied potential were studied. In pure copper solutions, increasing the Cu²⁺ concentration from 1000 to 5000 mg.L^-1 increased the copper recovery from about 30-300% depending on the cathode potential and decreased the energy consumption by about 30%. Also, with increasing the acid concentration from 15 to 50 g.L^-1 an about 25% increase in copper recovery and a 30% decrease in energy consumption were observed. The addition of Fe²⁺ to the solution improved the ionic conductivity and so that the copper recovery. The specified energy consumption for the real leaching solutions increased to 31-47 KWh.kg^-1. The diffusion coefficients for several synthesized and real copper electrowinning electrolytes were determined. Moreover, the maximum value of the diffusion coefficient (D) was obtained 2.27*10^-4 cm².s^-1 for the pure copper solution at a concentration of 1000 mg.L^-1 Cu²⁺ which was higher than impure and real solutions. https://ijmge.ut.ac.ir/article_86278_80469962a19ca5de82d2b2b79d53b5a9.pdf