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Electrochemical-switchable polymer film: An emerging technique for treatment of metallic ion aqueous waste

机译:电化学可切换聚合物膜:一种用于处理金属离子水性废物的新兴技术

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摘要

The present work aims at using grafted polyacrylic acid (PAA) films as active surfaces for heavy metal waste removal. We focus first on grafting PAA onto carbon felt surfaces by means of an economical and simple preparation method compatible with real industrial applications. XPS, SEM results and interfacial electrochemistry allow us to confirm the grafting of PAA films on carbon felts. Metal ion uptake inside the PAA film is discussed in detail. The final part of the work is then devoted to the application of carbon felt grafted PAA electrodes to remove metal ions from aqueous waste according to the electrochemical-switchable process. Primary treatments of real industrial effluents are performed with a lab-made semi-pilot system. Such electrochemical-pH-switchable PAA films can be considered within the field of aqueous effluent treatments in order to reach very low concentration in heavy metal ions.
机译:本工作旨在使用接枝的聚丙烯酸(PAA)薄膜作为活性表面去除重金属废物。我们首先致力于通过一种经济实用的方法将PAA接枝到碳毡表面上,使其与实际工业应用兼容。 XPS,SEM结果和界面电化学使我们能够确认PAA膜在碳毡上的接枝。详细讨论了PAA膜内部的金属离子吸收。然后,工作的最后一部分专门用于应用碳毡接枝的PAA电极,以根据电化学可切换过程从含水废物中去除金属离子。实际工业废水的主要处理是通过实验室制造的半试点系统进行的。为了在重金属离子中达到非常低的浓度,可以在水性废水处理领域内考虑这种电化学-pH-可切换的PAA膜。

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