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首页> 外文期刊>Environmental Science & Technology >Electrically Switched Ion Exchange Based on Carbon-Polypyrrole Composite Smart Materials for the Removal of ReO_4~- from Aqueous Solutions
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Electrically Switched Ion Exchange Based on Carbon-Polypyrrole Composite Smart Materials for the Removal of ReO_4~- from Aqueous Solutions

机译：基于碳-聚吡咯复合智能材料的电开关离子交换去除水溶液中的ReO_4〜-

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摘要

A simple and rapid process of ReO4- (as a surrogate of TcO4-) removal from aqueous solutions based on the electrically switched ion exchange (ESIX) method has been demonstrated in this work. Activated carbon-Polypyrrole (AC-PPy) was synthesized from activated carbon and pyrrole by electrodeposition method which was served as an electrically switched ion exchanger for ReO4- removal. The characterization results show that the AC-PPy composite exhibited an excellent loading capacity and a high stability for ions uptake and release. Chronoamperometric studies show that the ESIX treatment could be completed within 60 s, demonstrating the rapid uptake and release of ions. Uptake and release of Re04 was verified by electrochemical quartz crystal microbalance with dissipation shift (EQCMD) studies. By modulating the electrochemical potential of the AC-PPy, the uptake and release of ReO4- ions can be controlled. Similar trends of uptake and release of Re04were observed in cyclic voltammetry (-0.4 to 0.8 V) for five cycles with the EQCMD. X-ray photoelectron spectroscopy (XPS) confirmed the process of ReO4- removal in the AC-PPy composite. Conclusively, the smart material shows excellent efficiency and selectivity for the removal of ReO4- from aqueous solutions.
机译：在这项工作中，已经证明了基于电开关离子交换（ESIX）方法从水溶液中去除ReO4-（作为TcO4-的替代物）的简单，快速的过程。通过电沉积法由活性炭和吡咯合成了活性炭-聚吡咯（AC-PPy），将其用作去除ReO4-的电开关离子交换剂。表征结果表明，AC-PPy复合材料表现出优异的负载能力和离子吸收和释放的高稳定性。计时安培研究表明，ESIX处理可在60 s内完成，这表明离子的快速吸收和释放。 Re04的吸收和释放通过具有耗散位移的电化学石英晶体微天平（EQCMD）研究进行了验证。通过调节AC-PPy的电化学势，可以控制ReO4-离子的吸收和释放。在EQCMD的五个循环中，在循环伏安法（-0.4至0.8 V）中观察到了相似的Re04吸收和释放趋势。 X射线光电子能谱（XPS）证实了AC-PPy复合材料中ReO4-的去除过程。最终，该智能材料对于从水溶液中去除ReO4-表现出出色的效率和选择性。

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  • 来源
    《Environmental Science & Technology》 |2019年第5期|2612-2617|共6页
  • 作者

    Guo Zizhang; Shams Mehnaz; Zhu Chengzhou; Shi Qurong; Tian Yuhao; Engelhard Mark H.; Du Dan; Chowdhury Indranil; Lin Yuehe;

  • 作者单位

    Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA|Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Peoples R China;

    Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA;

    Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA;

    Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA;

    Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA;

    Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA;

    Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA;

    Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA;

    Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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