Degradation of Alizarin Red by electro-Fenton process using a graphite-felt cathode
Degradation of Alizarin Red by electro-Fenton process using a graphite-felt cathode
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DOI：
10.1016/j.electacta.2011.05.105
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发表时间：
2011-08-01
影响因子：
6.6
通讯作者：
Oturan, Mehmet A.
中科院分区：
文献类型：
--
作者：
Panizza, Marco;Oturan, Mehmet A.
以石墨毡为电催化剂，原位电生H2 O2，再生Fe 2+，研究了电Fenton法去除蒽醌染料茜素红S（AR）的效果。研究了外加电流、催化剂浓度、染料初始含量等工艺条件对AR降解的影响。AR衰减动力学，其氧化中间体的演变和矿化的水溶液中监测电解过程中通过UV-Vis分析和TOC测量。实验结果表明，电化学辅助芬顿反应产生的（OH）-O-中心点自由基可完全去除AR，其衰减动力学符合准一级反应。施加300 mA的电流和0.2 mM Fe 2+的催化剂浓度，在210分钟的电解中去除了95%的初始TOC，这意味着处理过的溶液的有机物含量几乎完全矿化。(C)2011爱思唯尔有限公司保留所有权利。
The removal of the anthraquinone dye Alizarin Red S (AR) has been investigated by electro-Fenton process using a commercial graphite-felt to electrogenerate in situ hydrogen peroxide and regenerate ferrous ions as catalyst. The effect of operating conditions such as applied current, catalyst concentration, and initial dye content on AR degradation has been studied. AR decay kinetic, the evolution of its oxidation intermediates and the mineralization of the aqueous solutions were monitored during the electrolysis by UV-Vis analysis and TOC measurements. The experimental results showed that AR was completely removed by the reaction with (OH)-O-center dot radicals generated from electrochemically assisted Fenton's reaction, and the decay kinetic always follows a pseudo-first-order reaction. Applying a current of 300 mA and with catalyst concentration of 0.2 mM Fe2+, 95% of the initial TOC was removed in 210 min of electrolysis, meaning the almost complete mineralization of the organic content of the treated solution. (C) 2011 Elsevier Ltd. All rights reserved.