Waste acid recovery utilizing monovalent cation permselective membranes through selective electrodialysis

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外文摘要：Selective electrodialysis (SED) has surfaced as a highly promising membrane separation technique in the realm of acid recovery owing to its ability to effectively separate monovalent ions through the utilization of a potential difference. However,the current SED process is limited by conventional commercial monovalent cation permselective membranes (MCPMs). This study systematically investigates the use of an independently developed MCPM in the SED process for acid recovery. Various factors such as current density,volume ratio,initial ion concentration,and waste acid systems are considered. The indepen-dently developed MCPM offers several advantages over the commercial monovalent selective cation-exchange membrane (CIMS),including higher recovered acid concentration,better ion flux ratio,improved acid recovery efficiency,increased recovered acid purity,and higher current efficiency. The SED process with the MCPM achieves a recovered acid of 95.9％ and a concentration of 2.3 mol·L-1 in the HCl/FeCl2 system,when a current density of 20 mA·cm-2 and a volume ratio of 1∶2 are applied. Similarly,in the H2SO4/FeSO4 system,a purity of over 99％ and a concentration of 2.1 mol·L-1 can be achieved in the recovered acid. This study thoroughly examines the impact of operation conditions on acid recovery performance in the SED process. The independently developed MCPM demonstrates outstanding acid recovery performance,highlighting its potential for future commercial utilization.

外文关键词：

Selective electrodialysisWastewaterMonovalent cation permselective membranesSeparationRecovery

作者：

Yanran Zhu、Yue Zhou、Qian Chen、Rongqiang Fu、Zhaoming Liu、Liang Ge、Tongwen Xu

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作者单位：

Anhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology,Department of Applied Chemistry,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China

Key Laboratory of Charged Polymeric Membrane Materials of Shandong Province,Shandong Tianwei Membrane Technology Co.,Ltd.,Weifang 261000,China

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaAnhui Provincial Key Research and Development PlanMajor Science and Technology Innovation Projects in Shandong Province

项目编号：

2022YFB38051002222281222178330202104b110200302022CXGC020415

出版年：

2024

DOI：

10.1016/j.cjche.2024.04.011

中国化学工程学报(英文版)

中国化工学会

中国化学工程学报(英文版)

CSTPCDEI

影响因子：0.818

ISSN：1004-9541

年,卷(期)：2024.71(7)