Removal of hardness by electrodialysis using homogeneous and heterogeneous ion exchange membranes
Removal of hardness by electrodialysis using homogeneous and heterogeneous ion exchange membranes
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DOI：
10.1080/19443994.2014.880159
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发表时间：
2015-04
影响因子：
1.1
通讯作者：
B. Karabacakoğlu;Filiz Tezakıl;Altan Güvenç
中科院分区：
文献类型：
--
作者：
B. Karabacakoğlu;Filiz Tezakıl;Altan Güvenç
摘要采用间歇循环模式，研究了膜特性对电渗析（ED）系统去除其稀溶液中硬度离子的影响。采用了两种膜对。I型：Ionac MC3470和MA3475 （Sybron Chem）。有限公司);II型：Neosepta CMX和Neosepta AMX （Astom公司）。这些膜具有不同的离子选择性、电阻和厚度。在第一部分的研究中，采用I型膜考察了进料浓度、稀释流速和稀释pH对去除硬度的影响。饲料浓度、流速和pH分别为0.01 M、2.6 mL/s和6.8 mL/s。在第二部分中，利用II型膜在不同电压值下进行了实验，得到了这些变量的最佳条件。Mg2+去除率为95%，能耗为2.07 kWh/mol， Ca2+去除率为93%，能耗为2.12 kWh/mol。
AbstractThe effect of membrane characteristics on removal of hardness ions from its dilute solutions using electrodialysis (ED) system by applying batch recirculation mode has been investigated. Two types of membrane pairs were used. Type I: Ionac MC3470 and MA3475 (Sybron Chem. Co.); Type II: Neosepta CMX and Neosepta AMX (Astom Corp.). These membranes have different ionic permselectivity, electrical resistance and thickness. In the first part of the study, the effects of the feed concentration, dilute flow rate and dilute pH on the hardness removal were investigated using Type I membranes. The optimum values for feed concentration, flow rate and pH were determined as 0.01 M, 2.6 mL/s and 6.8, respectively. In the second part, the experiments were conducted at different voltage values using Type II membranes under the optimum conditions of these variables obtained. The 95% removal of Mg2+ with the energy consumption of 2.07 kWh/mol and 93% removal of Ca2+ with the energy consumption of 2.12 kWh/mol were ...