Application Research on Desalination of Trona Brine by Bipolar Membrane Electrodialysis

作者：Zhou Junbo; Mu Xiusong; Gao Liping^*; Hao Shan; Liu Yang; Huang Wenjia

来源：International Journal of Electrochemical Science, 2014, 9(6): 2912-2921.

• Bipolar membrane
• Electrodialysis
• Trona brine
• Desalination
• Orthogonal experiment

The salt in trona brine seriously affects the soda ash recycling in the production process of soda ash, which not only results in low quality of soda ash recycling and wastes resources. Consequently, the trona brine should be desalted. The treatment of trona brine using bipolar membrane electrodialysis can reduce the concentration of sodium chloride effectively. Desalination with two compartment of a bipolar membrane electrodialysis composed of anion exchange membrane and bipolar membrane was investigated in this study. Some parameters such as the membrane stack voltage, material flux, temperature and concentration were adjusted. The effect of the parameters on desalination rate, current efficiency and electricity consumption was researched. The optimum process conditions can be obtained through single factor experiment and orthogonal experiment when the membrane stack voltage is 24V, material flux is 5L/h, the temperature is 20 degrees C and the concentration is 2.0mol/L. The desalination rate can reach 97.0% while the current efficiency is 84.3%. The process is not only has low current consumption but also reach a better treatment effect.

• 出版日期2014-6
• 单位北京联合大学应用文理学院; 北京化工大学