Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnOx/SBA-15

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnOx/SBA-15
	Sun, Qiangqiang; Wang, Yu; Li, Laisheng; Bing, Jishuai; Wang, Yingxin; Yan, Huihua
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2015-04-09
卷号	286 期号:0 页码:276-284
关键词	Clofibric acid Catalytic ozonation MnOx/SBA-15 Reaction mechanism Mineralization
英文摘要	Comparative experiments were conducted to investigate the catalytic ability of MnOx/SBA-15 for the ozonation of clofibric acid (CA) and its reaction mechanism. Compared with ozonation alone, the degradation of CA was barely enhanced, while the removal of TOC was significantly improved by catalytic ozonation (O-3/MnOx/SBA-15). Adsorption of CA and its intermediates by MnOx/SBA-15 was proved unimportant in O-3/MnOx/SBA-15 due to the insignificant adsorption of CA and little TOC variation after ceasing ozone in stopped-flow experiment. The more remarkably inhibition effect of sodium bisulfite (NaHSO3) on the removal of TOC in catalytic ozonation than in ozonation alone elucidated that MnOx/SBA-15 facilitated the generation of hydroxyl radicals ((OH)-O-center dot), which was further verified by electron spin-resonance spectroscopy (ESR). Highly dispersed MnOx on SBA-15 were believed to be the main active component in MnOx/SBA-15. Some intermediates were indentified and different degradation routes of CA were proposed in both ozonation alone and catalytic ozonation. The amounts of small molecular carboxylic acids (i.e., formic acid (FA), acetic acid (AA) and oxalic acid (OA)) generated in catalytic ozonation were lower than in zonation alone, resulting from the generation of more (OH)-O-center dot. (C) 2014 Elsevier B.V. All rights reserved.
研究领域[WOS]	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS记录号	WOS:000351963100033
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32799]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Sun, Qiangqiang,Wang, Yu,Li, Laisheng,et al. Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnOx/SBA-15[J]. JOURNAL OF HAZARDOUS MATERIALS,2015,286(0):276-284.
APA	Sun, Qiangqiang,Wang, Yu,Li, Laisheng,Bing, Jishuai,Wang, Yingxin,&Yan, Huihua.(2015).Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnOx/SBA-15.JOURNAL OF HAZARDOUS MATERIALS,286(0),276-284.
MLA	Sun, Qiangqiang,et al."Mechanism for enhanced degradation of clofibric acid in aqueous by catalytic ozonation over MnOx/SBA-15".JOURNAL OF HAZARDOUS MATERIALS 286.0(2015):276-284.