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Degradation of Auramine-O in Aqueous Solution by Ti/PbO 2 -Electro-Fenton Process by Hydrogen Peroxide Produced In Situ
Iranian Journal of Science and Technology, Transactions A: Science ( IF 1.7 ) Pub Date : 2020-09-17 , DOI: 10.1007/s40995-020-00975-4
Wenhui Sun , Yingwu Yao

Electrochemical removal of synthesis solution containing 50 mg/L auramine-O through Ti/PbO2 electrodes and carbon felt air-diffusion electrode to in situ generate hydrogen peroxide (H2O2) by the oxygen (O2) reduction. The effects of operating conditions, FeSO4·7H2O concentrations, current density, initial concentration, initial pH value and sodium sulfate (Na2SO4) concentration were investigated. For reaction of 60 min, the auramine-O removal rate reached 99% and total organic carbon (TOC) removal rate was close to 64.27%. This means that the organic macromolecules in the pollutants have been completely destroyed and broken down. The degradation of auramine-O under electro-Fenton (EF) process using Ti/PbO2-carbon felt was analyzed from the dimensions of TOC, mineralization current efficiency, energy consumption, degradation mechanism and kinetics. Comparing EF-Ti/PbO2 with Ti/PbO2 anode, AO (anodic oxidation)-Ti/PbO2 anodic oxidation using Ti/PbO2 anode and EF-Pt EF process with Pt anode, the consequences demonstrated that Ti/PbO2-EF process by hydrogen peroxide produced in situ was the best choice than others.



中文翻译:

Ti / PbO 2-电-芬顿法原位生产过氧化氢降解水溶液中的金胺-O

通过Ti / PbO 2电极和碳毡空气扩散电极电化学去除含50 mg / L金胺-O的合成溶液,通过氧(O 2)还原原位产生过氧化氢(H 2 O 2)。操作条件,FeSO 4 ·7H 2 O浓度,电流密度,初始浓度,初始pH值和硫酸钠(Na 2 SO 4)的影响)浓度进行了调查。在60分钟的反应中,金胺-O的去除率达到99%,总有机碳(TOC)去除率接近64.27%。这意味着污染物中的有机大分子已被完全破坏和分解。从TOC,矿化电流效率,能耗,降解机理和动力学等方面分析了使用Ti / PbO 2-碳毡在电芬顿(EF)工艺下对金胺-O的降解。比较EF-Ti / PbO 2与Ti / PbO 2阳极,AO(阳极氧化)-Ti / PbO 2阳极氧化(使用Ti / PbO 2阳极)和EF-Pt EF工艺与Pt阳极,结果表明Ti / PbO 2原位生产过氧化氢的-EF工艺是最佳选择。

更新日期:2020-09-18
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