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Cation Exchange Membrane with Internal-Blocking Sites for Mono/Multivalent Ion Separation
https://orcid.org/0000-0002-8139-5299
https://orcid.org/0000-0002-7578-2460
In this work, monovalent cation perm-selective membranes (MCPMs) with multiple internal-blocking sites were designed to enhance the Donnan effect and size-based exclusion effect. Polypyrrole (PPy), as the internal-blocking sites for ion transport, was introduced within the membrane matrix by in situ polymerization, which was prominent to mono- and multivalent ion separation in electrodialysis (ED). The precise growth of the internal-blocking sites was manipulated via optimization of the polymerization time and polymerization steps. The optimized SPPSU@3PPy membrane exhibits excellent separation performance: the SPPSU@3PPy membrane demonstrates perm-selectivity for Na+/Mg2+ (PNa Mg = 2.08) and a higher Na+ flux (J Na + = 3.29 × 10–8 mol cm–2 s–1). This in situ polymerization method to fabricate internal-blocking sites in a cation exchange membrane is a potential pathway to construct MCPMs.
The MCPMs with internal-blocking sites of PPy can effectively separate mono/multivalent ions from seawater under the ED process.
Cation Exchange Membrane with Internal-Blocking Sites for Mono/Multivalent Ion Separation
https://orcid.org/0000-0002-8139-5299
https://orcid.org/0000-0002-7578-2460
In this work, monovalent cation perm-selective membranes (MCPMs) with multiple internal-blocking sites were designed to enhance the Donnan effect and size-based exclusion effect. Polypyrrole (PPy), as the internal-blocking sites for ion transport, was introduced within the membrane matrix by in situ polymerization, which was prominent to mono- and multivalent ion separation in electrodialysis (ED). The precise growth of the internal-blocking sites was manipulated via optimization of the polymerization time and polymerization steps. The optimized SPPSU@3PPy membrane exhibits excellent separation performance: the SPPSU@3PPy membrane demonstrates perm-selectivity for Na+/Mg2+ (PNa Mg = 2.08) and a higher Na+ flux (J Na + = 3.29 × 10–8 mol cm–2 s–1). This in situ polymerization method to fabricate internal-blocking sites in a cation exchange membrane is a potential pathway to construct MCPMs.
The MCPMs with internal-blocking sites of PPy can effectively separate mono/multivalent ions from seawater under the ED process.
Cation Exchange Membrane with Internal-Blocking Sites for Mono/Multivalent Ion Separation
https://orcid.org/0000-0002-8139-5299
https://orcid.org/0000-0002-7578-2460
In this work, monovalent cation perm-selective membranes (MCPMs) with multiple internal-blocking sites were designed to enhance the Donnan effect and size-based exclusion effect. Polypyrrole (PPy), as the internal-blocking sites for ion transport, was introduced within the membrane matrix by in situ polymerization, which was prominent to mono- and multivalent ion separation in electrodialysis (ED). The precise growth of the internal-blocking sites was manipulated via optimization of the polymerization time and polymerization steps. The optimized SPPSU@3PPy membrane exhibits excellent separation performance: the SPPSU@3PPy membrane demonstrates perm-selectivity for Na+/Mg2+ (PNa Mg = 2.08) and a higher Na+ flux (J Na + = 3.29 × 10–8 mol cm–2 s–1). This in situ polymerization method to fabricate internal-blocking sites in a cation exchange membrane is a potential pathway to construct MCPMs.
The MCPMs with internal-blocking sites of PPy can effectively separate mono/multivalent ions from seawater under the ED process.
Cation Exchange Membrane with Internal-Blocking Sites for Mono/Multivalent Ion Separation
Zhao, Xueting (author) / Sun, Jinshan (author) / Zhao, Lei (author) / Dong, Jiajing (author) / Zhang, Xinliang (author) / Zhang, Xu (author) / Pan, Jiefeng (author)
ACS ES&T Water ; 4 ; 2259-2269
2024-05-10
Article (Journal)
Electronic Resource
English
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