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首页> 外文期刊>Separation and Purification Technology >Electrochemical removal of MTBE from water using the iridium dioxide coated electrode
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Electrochemical removal of MTBE from water using the iridium dioxide coated electrode

机译：使用二氧化铱涂层电极从水中电化学去除MTBE

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摘要

Methyl tert-butyl ether (MTBE) is always the most likely found compound at the front of a gasoline plume due to its chemical characteristics. In this study, an iridium dioxide (IrO2) coated electrode was utilized to perform electrochemical removal of MTBE in a lab-scale bath electrolyzer. Depending on the constant-potential controls, electrochemical removal of MTBE can be conducted either through direct oxidation, water electrolysis competition, or indirect oxidation. Direct oxidation mechanism performed MTBE removal up to 39% as electrolyzing below 1.2 V, and the occurrence of water electrolysis competition dropped MTBE removal as increasing the operative potential up to 2.0 V. The continual increase of operative potential-above 2.0 V brought about indirect oxidation of MTBE through the chain reactions of the redox mediator S2O8~(2-)/SO4~(2-). The matrix effect of iron enhances electrochemical oxidation of MTBE to provide about 2 times improvement on MTBE removal. The products of MTBE degradation were identified as tert-butyl alcohol (TBA), acetone, and CO2 by GC/MS, and the distributions of carbon atoms in TBA, acetone, CO2, and MTBE were found 18,12,62, and 8% through the optimum control of electrochemical oxidation.
机译：甲基叔丁基醚（MTBE）由于其化学特性，始终是最有可能在汽油羽流前端发现的化合物。在这项研究中，使用二氧化铱（IrO2）涂覆的电极在实验室规模的电解槽中进行MTBE的电化学去除。根据恒电位控制，可以通过直接氧化，水电解竞争或间接氧化进行MTBE的电化学去除。直接氧化机制在低于1.2 V的电压下进行电解时MTBE的去除率高达39％，随着水电解竞争的发生，随着工作电位上升至2.0 V，MTBE去除率降低。工作电压持续升高至2.0 V以上导致间接氧化。通过氧化还原介体S2O8〜（2-）/ SO4〜（2-）的链反应合成MTBE。铁的基体效应增强了MTBE的电化学氧化，从而使MTBE的去除率提高了约2倍。通过GC / MS将MTBE降解的产物鉴定为叔丁醇（TBA），丙酮和CO2，发现TBA，丙酮，CO2和MTBE中碳原子的分布分别为18、12、62和8 ％通过最佳控制电化学氧化。

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