Iodide ion trapping polypyrrole film: Selective capture of iodide ions by electrochemically switched ion extraction (ESIE) process
Iodide ion trapping polypyrrole film: Selective capture of iodide ions by electrochemically switched ion extraction (ESIE) process
复制标题
碘离子捕获聚吡咯薄膜：通过电化学转换离子萃取 (ESIE) 过程选择性捕获碘离子
DOI：
10.1016/j.cej.2019.122529
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发表时间：
2020
影响因子：
15.1
通讯作者：
Guan Guoqing
中科院分区：
文献类型：
--
作者：
Luo Jinhua;Du Xiao;Gao Fengfeng;Yang Yanyan;Hao Xiaoqiong;Li Shasha;Hao Xiaogang;Tang Keyong;Guan Guoqing
从低浓度盐水或放射性废水中有效提取碘离子（I-）仍然是一个巨大的挑战。在这项研究中，一个电活性的I-捕获聚吡咯膜（PPy/I-膜）是通过一个简单的一步电沉积方法制备的，并用于一个新的和有效的电化学开关离子萃取（ESIE）系统从稀水溶液中捕获I-。在此，PPy/I-膜由于特殊的I-捕获效率而显示出上级性能。在5 ppm KI溶液中，萃取容量高达287 mg/g，对I-/Cl-、I-/Br-、I-/SO 42-、I-/PO 43-的分离因子分别为6.93、22.16、15.92、7.92。此外，即使在几次重复循环之后，I-从用I-提取的PPy/I-膜的解吸效率也约为100%。结果表明，该膜电喷雾离子交换萃取体系具有高效的萃取能力、良好的选择性和良好的回收性能，可应用于工业稀溶液中I-的萃取。
Effective extraction of iodide ions (I−) from low-concentration brine or radioactive wastewater remains a great challenge. In this study, an electroactive I−trapping polypyrrole film (PPy/I−film) was fabricated via a facile one-step electrodeposition method and used in a novel and effective electrochemically switched ion extraction (ESIE) system for capture of I−from dilute aqueous solutions. Herein, the PPy/I−film displayed superior performance owing to the special I−trapping efficiency. The extraction capacity as high as 287 mg/g was achieved in 5 ppm KI solution, and the separation factors for I−/Cl−, I−/Br−, I−/SO42−, I−/PO43−were 6.93, 22.16, 15.92, 7.92, respectively. Moreover, the desorption efficiency of I−from the PPy/I−film extracted with I−was approximately 100% even after several repeated cycles. It manifested that the present ESIE system with the PPy/I−film had efficient extraction capacity, remarkable selectivity and excellent recyclability, which could be applied in the extraction of I−from the dilute industrial solutions.