通过电渗析去除氟离子的三种阴离子交换膜的性能。

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Fatima Zahra Addar, Idrisse Mohamed, Sarra Kitanou, Mustapha Tahaikt, Azzedine Elmidaoui, Mohamed Taky
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引用次数: 0

摘要

三种阴离子交换膜(AEM)通过电渗析(ED)还原氟离子的性能在真实水和合成水中进行了测试。电位法测量了由 ACS、AFN 和 AXE 膜分离的两种合成阴离子溶液之间的电位差 (PD)。这三种 AEM 与 CMX 膜(一种阳离子交换膜(CEM))对不同离子的选择性。去除率受极化层(PL)厚度的影响,极化层可减少物质转移并提供额外的屏障。极化层的厚度 δ 越大,通过时间就越长,因此阴离子的去除率就越小。利用非搅拌层模型,将确定每种离子的 δ。根据电位测量方法,测试的 AEM 对氟离子都没有选择性,选择性顺序如下:AFN> AXE> ACS。为去除氟离子而选择的最佳膜组合是 ACS/CMX,离子选择性的顺序为Cl->NO-3>F->HCO-3>SO42-。对于 ACS 膜,氟离子的脱盐率(DR)和δ均受共离子初始浓度的影响,其顺序如下:NO-3> Cl-> HCO-3> SO42-:NO-3> Cl-> HCO-3> SO2-4。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance of three anion-exchange membranes in fluoride ions removal by electrodialysis.

The performance of three anion-exchange membranes (AEMs) in the fluoride ions reduction by electrodialysis (ED) is performed on real and synthetic water. The electric potential method measures the potential difference (PD) between two synthetic anion solutions separated by ACS, AFN and AXE membranes. The selectivity of these three AEMs coupled with the membrane CMX, is a cation-exchange membrane (CEM) towards different ions. The removal rate is influenced by the thickness of the polarization layer (PL) which reduces the material transfer and provides an additional barrier. The greater the thickness δ of the PL, the longer the passage time and consequently the removal rate of anions is small. Using the unstirred layer model, δ for each ion will be determined. According to the potential measurement method, none of the tested AEMs are selective to fluoride ions and the order of selectivity is as follows: AFN> AXE> ACS. Best membrane couple selected for fluoride ion removal is ACS/CMX and ion selectivity follows the order: Cl-> NO-3>F-> HCO-3> SO42-. For ACS membrane, both the demineralization rate (DR) and δ of fluoride ions are influenced by the initial concentration of the co-ion according to the following order: NO-3> Cl-> HCO-3> SO2-4.

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来源期刊
Water Science and Technology
Water Science and Technology 环境科学-工程:环境
CiteScore
4.90
自引率
3.70%
发文量
366
审稿时长
4.4 months
期刊介绍: Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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