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首页> 外文期刊>Chemosphere >Electrochemical Incineration Of Cresols: A Comparative Study Between Pbo_2 And Boron-doped Diamond Anodes
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Electrochemical Incineration Of Cresols: A Comparative Study Between Pbo_2 And Boron-doped Diamond Anodes

机译：甲酚的电化学焚烧：Pbo_2与掺硼金刚石阳极的比较研究

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摘要

The electrooxidation of aqueous solutions containing 5 mM of o-, m- and p-cresol at pH 4.0 has been investigated using a flow filter-press reactor with a boron-doped diamond (BDD) under galvanostatic electrolysis. All cresols are degraded at similar rate up to attaining overall mineralization. Comparable treatment of the m-cresol effluent on PbO_2 leads to partial electrochemical incineration. However, this pollutant is more rapidly removed with PbO_2 than with BDD. The decay kinetics of all cresols follows a pseudo-first-order reaction. Aromatic intermediates such as 2-methylhydroquinone and 2-methyl-p-benzoquinone and carboxylic acids such as maleic, fumaric, pyruvic, malonic, tartronic, glycolic, gly-oxylic, acetic, oxalic and formic, have been identified and followed during the m-cresol treatment by chromatographic techniques. From these oxidation by-products, a plausible reaction sequence for m-cresol mineralization on both anodes is proposed. The energy consumption for the corresponding electrochemical process is also calculated.
机译：已经使用流电-压-压反应器在恒电流电解条件下使用掺硼金刚石（BDD），研究了pH 4.0下含有5 mM邻，间和对甲酚的水溶液的电氧化。所有甲酚都以相似的速率降解，直至达到总体矿化程度。在PbO_2上对甲酚流出液进行可比处理会导致部分电化学焚烧。但是，与BDD相比，PbO_2可以更快地去除这种污染物。所有甲酚的衰变动力学遵循伪一级反应。已鉴定出芳香族中间体（例如2-甲基氢醌和2-甲基对苯醌）和羧酸（例如马来酸，富马酸，丙酮酸，丙二酸，tartronic，乙醇酸，乙醛酸，乙酸，草酸和甲酸），并在整个过程中进行了跟踪。色谱技术处理甲酚。从这些氧化副产物，提出了两个阳极上间甲酚矿化的合理反应顺序。还计算了相应电化学过程的能耗。

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