Catalytic degradation of phenol in sonolysis by coal ash and H2O2/O3
Catalytic degradation of phenol in sonolysis by coal ash and H2O2/O3
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粉煤灰和H2O2/O3超声催化降解苯酚
DOI：
10.1016/j.cej.2009.06.030
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发表时间：
2009-11-01
影响因子：
15.1
通讯作者：
Zhou, J. M.
中科院分区：
文献类型：
--
作者：
Liu, H.;Liang, M. Y.;Zhou, J. M.
本研究表明，粉煤灰作为广泛分布的固体废物处理，在超声波辐射下，无论存在或不存在 H2O2/O-3，都可以作为去除有机污染物的介质。煤灰可以作为催化剂，在 H2O2/O-3 的存在下产生 (OH)-O-中心点自由基，从而增强苯酚的降解。实验结果表明，以粉煤灰为催化剂，在超声波照射下，在H2O2和O-3存在下，苯酚分别降解了83.4%和88.8%。苯酚的降解率随着O-3用量的增加而增加，而H2O2存在苯酚降解的最佳浓度（1.5 mM）。较高的粉煤灰用量可能会导致较高的苯酚降解率。 H2O2/粉煤灰/超声波体系在酸性条件下能获得更好的苯酚降解性能，而O-3/粉煤灰/超声波体系在碱性条件下有利于苯酚降解。这项研究为废水处理特别是被酚类污染物污染的废水处理提供了一种新方法。 (C) 2009 Elsevier B.V. 保留所有权利。
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.