Catalytic degradation of phenol in sonolysis by coal ash and H2O2/O-3

文献类型： 外文期刊

第一作者： Liu, C. S.

作者： Liu, C. S.;Gao, Y. X.;Zhou, J. M.;Liu, H.;Liang, M. Y.

作者机构：

关键词： Phenolic compounds;Coal ash;Ultrasonic;Catalytic degradation;Fenton-like

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.273； 五年影响因子：11.529 ）

ISSN： 1385-8947

年卷期： 2009 年 153 卷 1-3 期

页码：

收录情况： SCI

摘要： This Study demonstrated that coal ash, as widely distributed solid waste disposal, would function as a media for organic pollutants removal in the presence or absence of H2O2/O-3 under ultrasonic radiation. Coal ash could act as a catalyst to generate (OH)-O-center dot radicals with the presence of H2O2/O-3 and consequently enhance the phenol degradation. Experimental results showed that when using coal ash as a catalyst under ultrasonic irradiation, 83.4% and 88.8% of phenol was degraded in the presence of H2O2 or O-3, respectively. The degradation rate of phenol would increase with increasing amount of O-3, while there was an optimal concentration of H2O2 (1.5 mM) for phenol degradation. Higher dosage of coal ash could result in higher phenol degradation rates. H2O2/coal ash/ultrasonic system could achieve better performance for phenol degradation under more acidic conditions, while more alkaline condition in O-3/coal ash/ultrasonic system favored phenol degradation. This study provides a new approach for wastewater treatment especially when contaminated with phenolic pollutants. (C) 2009 Elsevier B.V. All rights reserved.

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