Na_2SO_4-NaCl-H_2O三元水盐体系在313 K的相平衡研究  

Study on Phase Equilibrium of Na_2SO_4-NaCl-H_2O at 313 K in Ternary Water and Salt System

作　　者：苏丽鳗 江雅娟 蒋桑芬 刘俊劭[1,2] 

机构地区：[1]武夷学院生态与资源工程学院,福建武夷山354300 [2]福建省生态产业绿色技术重点实验室(武夷学院),福建武夷山354300

出　　处：《武夷学院学报》2017年第6期12-14,共3页Journal of Wuyi University

基　　金：武夷学院青年基金项目(XL1210);福建省大学生创新性实验项目(201410397029)

摘　　要：采用湿固相法研究Na_2SO_4-NaCl-H_2O三元水盐体系在313 K条件下的相平衡关系;利用离子色谱测定该体系的溶解度数据,并绘制相图。研究结果表明,利用等温溶解平衡法测定313 K时的Na_2SO_4-NaCl-H_2O溶解度数据,应用湿渣法确定固相组成;利用溶解度数据绘制相图,该体系分为4个区,包括纯的Na_2SO_4结晶区、纯NaCl的结晶区、Na_2SO_4和NaCl的共同结晶区及不饱和区。The phase equilibrium relationship of Na2SO4-NaCl-H2O at 313 K in ternary water and salt system is studied by wet solid phase method;the solubility data of the system are determined by ion chromatography and the phase diagram is plotted.The result of re-search indicates that the solubility data of Na2SO4-NaCl-H2O at 313 K is determined by isothermal dissolution equilibrium method,and the solid phase composition is determined by wet slag method. The phase diagram is drawn by the solubility data, and the system is divided into four regions, including the pure Na2SO4 crystallization zone, the crystallization zone of pure NaCl, the common crystallization zone and unsaturated zone of Na2SO4 and NaCl.

关 键 词：Na2SO4-NaCl-H2O 湿固相法 相图 水盐体系 离子色谱 

分 类 号：X832[环境科学与工程—环境工程]