电化学生成的芬顿试剂氧化 2,6-二甲基苯胺。
Chemical oxidation of 2,6-dimethylaniline by electrochemically generated Fenton's reagent.
机构信息
Department of Interdisciplinary Programs in Environmental Science, Graduate School, Chulalongkorn University, Bangkok, Thailand.
出版信息
J Hazard Mater. 2010 Apr 15;176(1-3):92-8. doi: 10.1016/j.jhazmat.2009.11.003. Epub 2009 Nov 10.
Oxidation of 2,6-dimethylaniline by electro-Fenton process in acidic solution at pH 2 was investigated. The effects of pH, Fe(2+), H(2)O(2) and current density were assessed to determine the optimum operating parameters. The oxidation efficiency of 2,6-dimethylaniline was determined by the reduction of 2,6-dimethylaniline, COD and TOC in the solutions. Results reveal that 1 mM of 2,6-dimethylaniline can be completely degraded in 4 h with 1 mM of Fe(2+) and 20 mM of H(2)O(2) and current density of 15.89 A m(-2) at pH 2. The highest COD and TOC removal were observed when 120 mM of hydrogen peroxide was applied. Consequently, the electro-Fenton process is a reliable alternative in the degradation of 2,6-dimethylaniline. 2,6-dimethylphenol, 2,6-dimethylnitrobenzene, 2,6-dimethylbenzoquinone, 3-hexanone, lactic acid, oxalic acid, acetic acid, maleic acid and formic acid were detected during the degradation of 1 mM of 2,6-dimethylaniline solution by electro-Fenton method. A reaction pathway that includes these products is proposed for 2,6-dimethylaniline degradation.
在 pH 2 的酸性溶液中，通过电芬顿工艺氧化 2,6-二甲基苯胺。评估了 pH、Fe(2+)、H(2)O(2)和电流密度的影响，以确定最佳操作参数。通过溶液中 2,6-二甲基苯胺、COD 和 TOC 的减少来确定 2,6-二甲基苯胺的氧化效率。结果表明，在 pH 2 下，当 1 mM 的 Fe(2+)和 20 mM 的 H(2)O(2)以及电流密度为 15.89 A m(-2)时，1 mM 的 2,6-二甲基苯胺可在 4 小时内完全降解。当应用 120 mM 的过氧化氢时，观察到最高的 COD 和 TOC 去除率。因此，电芬顿工艺是降解 2,6-二甲基苯胺的可靠替代方法。在通过电芬顿法降解 1 mM 的 2,6-二甲基苯胺溶液的过程中，检测到 2,6-二甲基苯酚、2,6-二硝基苯、2,6-二甲基苯醌、3-己酮、乳酸、草酸、乙酸、马来酸和甲酸。提出了一个包括这些产物的反应途径，用于 2,6-二甲基苯胺的降解。
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