Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe-Al LDH/Al2O3

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	Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe-Al LDH/Al2O3
	Nie, Yulun; Li, Nengneng; Hu, Chun
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2015-09-04
卷号	151 期号:0 页码:256-261
关键词	Fe-Al LDH/Al2O3 Catalytic ozonation Organic compound Surface Fe(II) BrO3- reduction
英文摘要	Fe-Al layered double hydroxides (Fe-Al LDH, the molar ratio of Fe(II) to Fe(III) was about 1:10) was successfully supported and highly dispersed on mesoporous Al2O3 based on the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. Fe-Al LDH/Al2O3 was more efficient in inhibiting BrO3- formation and removing organic pollutant taking ozonation alone as control. Further investigation indicated that BrO3- reduction by surface Fe(II) was responsible to the complete inhibition of BrO3- formation. Fe(II) was reduced from the Fe(III)-intermediates complex via an electron transfer process and the reaction of Fe(III) and HO2-/O-2(-) in catalytic ozonation. The amount of surface Fe(II) in catalytic ozonation of amitrole (AMT), phenazone (PZ) and 2,4-dichlorophenoxyacetic acid (2,4-D) was 0.34, 2.47 and 3.30 mu mol/g, which proved that most of Fe(II) was generated from the reaction of ozone and Fe-Al LDH/Al2O3 since 0.33 mu mol/g of Fe(II) existed within the catalyst. The increase of ozone amount and the formation of Fe(III)-intermediates complex could enhance the Fe(II) generation, leading to more efficient inhibition of BrO3- formation. Finally, Fe-Al LDH/Al2O3 still showed effectiveness in the inhibition of BrO3- and TOC removal for a raw drinking water under the realistic conditions, which could be applied to the BrO3- mineralization in catalytic ozonation of Br--containing drinking water. (C) 2015 Elsevier B.V. All rights reserved.
研究领域[WOS]	Engineering, Chemical
WOS记录号	WOS:000360775200033
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32772]
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	Nie, Yulun,Li, Nengneng,Hu, Chun. Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe-Al LDH/Al2O3[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2015,151(0):256-261.
APA	Nie, Yulun,Li, Nengneng,&Hu, Chun.(2015).Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe-Al LDH/Al2O3.SEPARATION AND PURIFICATION TECHNOLOGY,151(0),256-261.
MLA	Nie, Yulun,et al."Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe-Al LDH/Al2O3".SEPARATION AND PURIFICATION TECHNOLOGY 151.0(2015):256-261.