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Polymer ion-exchange membranes for capacitive deionization of aqueous media with low and high salt concentration
Desalination ( IF 9.9 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.desal.2020.114331
Yuan Zhang , Pattarachai Srimuk , Mesut Aslan , Markus Gallei , Volker Presser

Abstract In this work, carbon electrode modified polymer membrane and free-standing polymer membranes are applied for desalination via capacitive deionization with microporous activated carbon. The desalination performance under different concentrations (20 mM and 600 mM) of feed water and different voltage operation mode (zero-volt and voltage-reversal operation). For the ion exchange membrane coating under 20 mM NaCl solution at a cell voltage of 0/+1 V, the desalination capacity reached 22.7 mg/g at the charge efficiency of 142.1%. In the case of the free-standing membrane, under 600 mM NaCl solution at a voltage range of −1/+1 V, the desalination capacity reached 26.0 mg/g with a charge efficiency of 61.5%. These results not only show the possibility of membrane capacitive deionization (MCDI) application in seawater desalination but also reveals different ion transport mechanisms of the coated membrane and free-standing membranes under different molar strength of feed water.

中文翻译:

用于对低盐和高盐浓度水介质进行电容去离子的聚合物离子交换膜

摘要 在这项工作中,碳电极改性聚合物膜和自支撑聚合物膜被应用于微孔活性炭电容去离子脱盐。不同给水浓度(20 mM和600 mM)和不同电压操作模式(零伏和反压操作)下的脱盐性能。对于20 mM NaCl溶液下的离子交换膜涂层,在0/+1 V的电池电压下,在142.1%的充电效率下,脱盐能力达到22.7 mg/g。在自支撑膜的情况下,在-1/+1 V 电压范围内的 600 mM NaCl 溶液下,脱盐能力达到 26.0 mg/g,充电效率为 61.5%。
更新日期:2020-04-01
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