数字农科院2.0

Chloride ions promoted the catalytic wet peroxide oxidation of phenol over clay-based catalysts

文献类型： 外文期刊

作者： Zhou, Shiwei;Xu, Minggang;Zhang, Changbo;Song, Zhengguo;Xu, Rui;Gu, Chuantao

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关键词： catalytic wet peroxide oxidation (CWPO);chloride-assistance;induction period;rate-limiting step;surface modification

期刊名称： WATER SCIENCE AND TECHNOLOGY

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收录情况： SCI

摘要： Catalytic wet peroxide oxidation (CWPO) of phenol over clay-based catalysts in the presence and absence of NaCl was investigated. Changes in the H2O2, Cl-, and dissolved metal ion concentration, as well as solution pH during phenol oxidation, were also studied. Additionally, the intermediates formed during phenol oxidation were detected by liquid chromatography-mass spectroscopy and the chemical bonding information of the catalyst surfaces was analyzed by X-ray photoelectron spectroscopy (XPS). The results showed that the presence of Cl- increased the oxidation rate of phenol to 155%, and this phenomenon was ubiquitous during the oxidation of phenolic compounds by H2O2 over clay-based catalysts. Cl--assisted oxidation of phenol was evidenced by several analytical techniques such as mass spectroscopy (MS) and XPS, and it was hypothesized that the rate-limiting step was accelerated in the presence of Cl-. Based on the results of this study, the CWPO technology appears to be promising for applications in actual saline phenolic wastewater treatment.

分类号： TV21

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