In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids
The crystalized mixed salts from the zero liquid discharge process are a hazardous threat to the environment. In this study, we developed a novel electrodialysis (SBMED) method by assembling the monovalent selective anion-exchange membrane (MSAEM) into the bipolar membrane electrodialysis (BMED) sta...
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| Format: | Article |
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MDPI AG
2020-06-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/10/6/135 |
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| author | Haiyang Yan Wei Li Yongming Zhou Muhammad Irfan Yaoming Wang Chenxiao Jiang Tongwen Xu |
| author_facet | Haiyang Yan Wei Li Yongming Zhou Muhammad Irfan Yaoming Wang Chenxiao Jiang Tongwen Xu |
| author_sort | Haiyang Yan |
| collection | DOAJ |
| description | The crystalized mixed salts from the zero liquid discharge process are a hazardous threat to the environment. In this study, we developed a novel electrodialysis (SBMED) method by assembling the monovalent selective anion-exchange membrane (MSAEM) into the bipolar membrane electrodialysis (BMED) stack. By taking the advantages of water splitting in the bipolar membrane and high perm-selectivity of MSAEM for the Cl<sup>−</sup> ions against the SO<sub>4</sub><sup>2−</sup> ions, this combination allows the concurrent separation of Cl<sup>−</sup>/SO<sub>4</sub><sup>2−</sup> and conversion of mixed salts into relatively high-purity monoprotic and diprotic acids. The current density has a significant impact on the acid purity. Both the monoprotic and diprotic acid purities were higher than 80% at a low current density of 10 mA/cm<sup>2</sup>. The purities of the monoprotic acids decreased with an increase in the current density, indicating that the perm-selectivity of MSAEM decreases with increasing current density. An increase in the ratio of monovalent to divalent anions in the feed was beneficial to increase the purity of monoprotic acids. High-purity monoprotic acids in the range of 93.9–96.1% were obtained using this novel SBMED stack for treating simulated seawater. Therefore, it is feasible for SBMED to valorize the mixed salts into relatively high-purity monoprotic and diprotic acids in one step. |
| first_indexed | 2024-03-10T18:52:28Z |
| format | Article |
| id | doaj.art-850bc52b0c994679be64bc6558238d51 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T18:52:28Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-850bc52b0c994679be64bc6558238d512023-11-20T05:03:31ZengMDPI AGMembranes2077-03752020-06-0110613510.3390/membranes10060135In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic AcidsHaiyang Yan0Wei Li1Yongming Zhou2Muhammad Irfan3Yaoming Wang4Chenxiao Jiang5Tongwen Xu6CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, ChinaHefei ChemJoy Polymer Materials, Co., Ltd., Hefei 230601, ChinaCAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, ChinaCAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, ChinaThe crystalized mixed salts from the zero liquid discharge process are a hazardous threat to the environment. In this study, we developed a novel electrodialysis (SBMED) method by assembling the monovalent selective anion-exchange membrane (MSAEM) into the bipolar membrane electrodialysis (BMED) stack. By taking the advantages of water splitting in the bipolar membrane and high perm-selectivity of MSAEM for the Cl<sup>−</sup> ions against the SO<sub>4</sub><sup>2−</sup> ions, this combination allows the concurrent separation of Cl<sup>−</sup>/SO<sub>4</sub><sup>2−</sup> and conversion of mixed salts into relatively high-purity monoprotic and diprotic acids. The current density has a significant impact on the acid purity. Both the monoprotic and diprotic acid purities were higher than 80% at a low current density of 10 mA/cm<sup>2</sup>. The purities of the monoprotic acids decreased with an increase in the current density, indicating that the perm-selectivity of MSAEM decreases with increasing current density. An increase in the ratio of monovalent to divalent anions in the feed was beneficial to increase the purity of monoprotic acids. High-purity monoprotic acids in the range of 93.9–96.1% were obtained using this novel SBMED stack for treating simulated seawater. Therefore, it is feasible for SBMED to valorize the mixed salts into relatively high-purity monoprotic and diprotic acids in one step.https://www.mdpi.com/2077-0375/10/6/135bipolar membraneelectrodialysismonovalent selective anion-exchange membraneszero liquid dischargecoal mining industry |
| spellingShingle | Haiyang Yan Wei Li Yongming Zhou Muhammad Irfan Yaoming Wang Chenxiao Jiang Tongwen Xu In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids Membranes bipolar membrane electrodialysis monovalent selective anion-exchange membranes zero liquid discharge coal mining industry |
| title | In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids |
| title_full | In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids |
| title_fullStr | In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids |
| title_full_unstemmed | In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids |
| title_short | In-Situ Combination of Bipolar Membrane Electrodialysis with Monovalent Selective Anion-Exchange Membrane for the Valorization of Mixed Salts into Relatively High-Purity Monoprotic and Diprotic Acids |
| title_sort | in situ combination of bipolar membrane electrodialysis with monovalent selective anion exchange membrane for the valorization of mixed salts into relatively high purity monoprotic and diprotic acids |
| topic | bipolar membrane electrodialysis monovalent selective anion-exchange membranes zero liquid discharge coal mining industry |
| url | https://www.mdpi.com/2077-0375/10/6/135 |
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