Ion Resource Recovery via Electrodialysis Fabricated with Poly(Arylene Ether Sulfone)-Based Anion Exchange Membrane in Organic Solvent System.
Ion Resource Recovery via Electrodialysis Fabricated with Poly(Arylene Ether Sulfone)-Based Anion Exchange Membrane in Organic Solvent System.
复制标题
有机溶剂体系聚芳醚砜阴离子交换膜电渗析回收离子资源
DOI：
10.1002/smll.202306313
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发表时间：
2023-11
期刊：
影响因子：
13.3
通讯作者：
Jingwen Xu;Junjie Mu;Yuyang Yao;Yanqing Xu;Junbin Liao;Huimin Ruan;Jiangnan Shen
中科院分区：
文献类型：
--
作者：
Jingwen Xu;Junjie Mu;Yuyang Yao;Yanqing Xu;Junbin Liao;Huimin Ruan;Jiangnan Shen
从有机废水中回收离子资源有利于实现排放峰值和碳中和目标。先进的有机耐溶剂型阴离子交换膜(AEMS)用于电渗析(ED)处理有机废水具有重要意义。本文报道了一种基于柔性交联剂(DBH)的聚芳醚砜三维网络AEM，用于有机溶剂体系中离子源的ED回收。研究表明，所制备的AEMS在60%DMSO(AQ.)、60%乙醇(AQ.)和60%丙酮(AQ.)中分别具有良好的尺寸稳定性。例如，优化后的AEM在有机溶剂中的溶胀率很低，为1.04-1.10%。AEM在有机溶剂中暴露30天后，ED脱盐率可达99.1%，而在含有有机溶剂和0.5M氯化钠的混合溶液中，ED脱盐率仍可达99%。在电流密度为2.5 mA cm-2的条件下，优化后的膜在有机溶剂中浸泡30d后，对PERM的选择性(Cl-/SO42-)为133.09(VS13.11，Neosepta ACS)。其优异的电性能归功于SAXS证实的AEM中稳定的连续亚纳米通道、旋转能垒等。本工作展示了交联型AEMS在有机废水资源回收中的潜在应用。
Ion resource recovery from organic wastewater is beneficial for achieving emission peaks and carbon neutrality targets. Advanced organic solvent-resistant anion exchange membranes (AEMs) for treating organic wastewater via electrodialysis (ED) are of significant interest. Herein, a kind of 3D network AEM based on poly(arylene ether sulfone) cross-linked with a flexible cross-linker (DBH) for ion resource recovery via ED in organic solvent system is reported. Investigations demonstrate that the as-prepared AEMs show excellent dimensional stability in 60% DMSO (aq.), 60% ethanol (aq.), and 60% acetone (aq.), respectively. For example, the optimized AEM shows very low swelling ratios of 1.04-1.10% in the organic solvents. ED desalination ratio can reach 99.1% after exposure of the AEM to organic solvents for 30 days, and remain > 99% in a mixture solution containing organic solvents and 0.5 m NaCl. Additionally, at a current density of 2.5 mA cm-2 , the optimized AEM soaked in organic solvents for 30 days shows a high perm-selectivity (Cl- /SO4 2- ) of 133.09 (vs 13.11, Neosepta ACS). The superior ED performance is attributed to the stable continuous sub-nanochannels within AEM confirmed by SAXS, rotational energy barriers, etc. This work shows the potential application of cross-linked AEMs for resource recovery in organic wastewater.