PbO₂ 和 BDD 阳极上含邻甲苯胺废水的电化学降解
Electrochemical degradation of waters containing O-toluidine on PbO2 and BDD anodes.
作者信息
Hmani Emna, Chaabane Elaoud Sourour, Samet Youssef, Abdelhédi Ridha
机构信息
UR Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, BPW 3038 Sfax, Tunisia.
出版信息
J Hazard Mater. 2009 Oct 30;170(2-3):928-33. doi: 10.1016/j.jhazmat.2009.05.058. Epub 2009 May 21.
Electrochemical oxidation of O-toluidine (OT) was studied by galvanostatic electrolysis using lead dioxide (PbO2) and boron-doped diamond (BDD) as anodes. The influence of operating parameters, such as current density, initial concentration of OT and temperature was investigated. Measurements of chemical oxygen demand were used to follow the oxidation. The experimental data indicated that on PbO2 and BDD anodes, OT oxidation takes place by reaction with electrogenerated hydroxyl radicals and is favoured by low current density and high temperature. Furthermore, BDD anodes offer significant advantages over PbO2 in terms of current efficiency and oxidation rate.
采用恒电流电解法，以二氧化铅（PbO₂）和掺硼金刚石（BDD）为阳极，研究了邻甲苯胺（OT）的电化学氧化过程。考察了电流密度、OT初始浓度和温度等操作参数的影响。通过测量化学需氧量来跟踪氧化过程。实验数据表明，在PbO₂和BDD阳极上，OT的氧化是通过与电生成的羟基自由基反应进行的，低电流密度和高温有利于该反应。此外，在电流效率和氧化速率方面，BDD阳极比PbO₂具有显著优势。
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