摘要
根据碳酸钙在亚氨基二乙酸盐体系(Ida^(2-)-H_2O体系)中的溶解热力学平衡方程建立其溶解热力学模型,分析了298K条件下体系中总钙浓度、游离钙浓度、游离亚氨基二乙酸根离子浓度、游离碳酸根离子浓度、钙物种及亚氨基二乙酸根物种的分布。结果表明:在酸性亚氨基二乙酸盐体系中,碳酸钙的溶解以酸溶作用为主,碳酸钙可以大量溶于酸性亚氨基二乙酸盐体系中;在碱性亚氨基二乙酸盐体系中,碳酸钙的溶解以亚氨基二乙酸根离子与钙离子配合作用为主,由于二者配合能力较弱,所以碳酸钙不会溶解。
The dissolution thermodynamic model of CaCO3 in iminodiacetate aqueous solution(Ida2--H2O system)was constructed according to the thermodynamic equilibrium equations for the system.The total concentration of Ca^(2+),free Ca^(2+)concentration,free Ida2-concentration,free CO2-3 concentration,species distribution of Ca2+and Ida2-in the system at 298 Kwere analyzed.The results show that CaCO3 can be dissolved in acidic Ida^(2-)-H2O system by iminodiacetic acid(IDA),and cannot be dissolved in alkaline Ida^(2-)-H2O system by Ida2-complex-leaching,because of the coordination ability of Ida2-with Ca^(2+)is very weak.
出处
《湿法冶金》
CAS
北大核心
2017年第6期515-520,共6页
Hydrometallurgy of China
基金
国家自然科学基金资助项目(51604124)
江苏省自然科学资金资助项目(BK20140558)
江苏大学高级人才资金资助项目(13JDG097)