Effect of Seawater on the Solubility and Physicochemical Properties of Acidic Copper Sulfate Solutions

详细信息    查看全文

• 作者：P铆a C. Hern谩ndez ; H茅ctor R. Galleguillos ; Te贸filo A. Graber ; Elsa K. Flores ; Mar铆a E. Taboada
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2012
• 出版时间：September 13, 2012
• 年：2012
• 卷：57
• 期：9
• 页码：2430-2436
• 全文大小：292K
• 年卷期：v.57,no.9(September 13, 2012)
• ISSN：1520-5134

文摘

Seawater is an alternative to freshwater, which is scarce for copper mining in northern Chile, but it has components that may be problematic for hydrometallurgical processes. This work determines the influence of seawater on the solid鈥搇iquid equilibrium for acid solutions of CuSO₄ at different temperatures, (298.15 to 323.15) K, and its effect on physical properties (density, refractive index, ionic conductivity, and viscosity). The measured properties show an average difference between CuSO₄ in seawater and CuSO₄ in freshwater of 1.42 % for solubility, 1 % for density, 0.29 % for refractive index, 24.61 % for ionic conductivity, and 5.61 % for viscosity. In addition, the physical properties of unsaturated solutions composed of CuSO₄ in acidic seawater at different temperatures, (298.15 to 323.15) K, and molalities, (0.1 to 1.8) m, were measured. The experimental data for the physical properties were correlated using Othmer鈥檚 rule. This equation yields a good fit and predicts saturation data with the exception of ionic conductivity, where the Casteel鈥揂mis equation is recommended. The solubilities and properties for both systems (acidic seawater and freshwater) are similar. This observation suggests that seawater may be appropriate for leaching with no major short-term effects.