Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles

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

	Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles
	Tu, Jinjun; Yang, Zhendong; Hu, Chun
刊名	JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
	2015-01
卷号	90 期号:1 页码:80-86
关键词	mixed-valence manganese oxide Mn-oxdizing bacteria aerobic oxidation superoxide radicals chlorinated phenols
英文摘要	BACKGROUNDMixed-valence manganese oxide nanoparticles (nano-MnOx) were prepared by the oxidation of Mn (II) with Mn-oxdizing bacteria Pseudomonas sp. G7. The chlorophenols transformation process was studied in detail. RESULTSThe materials were characterized by XRD, TEM-EDX, and XPS measurements. The characterization showed that mixed valence of Mn (II), Mn (III), and Mn (IV) existed in nano-MnOx-1 with the initial Mn (II) dosage of 0.4 mmol L-1. The catalyst was found to be highly effective, stable for catalytic aerobic oxidation of chlorophenols without any Mn (II) release from the catalyst throughout the reaction. Moreover, chlorinated phenols including 2-chlorophenol, 2, 4-dichlorophenol and 2, 4, 6-trichlorophenol, were partly converted into small organic acids. The formation of superoxide radicals (O-2(center dot-)) predominantly came from the interaction of oxygen in air with the reduced manganese in nano-MnOx on the basis of the studies of electron spin resonance and all other information. CONCLUSIONThe mixed valence in nano-MnOx-1 enhanced the formation of O-2(center dot-), resulting in the inhibition of Mn (II) release, maintaining the catalyst stable. Degradation of the tested chlorinated phenols was ascribed to the oxidation of Mn (III/IV) and O-2(center dot-) in nano-MnOx-1 suspension. This finding indicates the potential of nano-MnOx for the elimination of unbiodegradable chemicals in water. (c) 2013 Society of Chemical Industry
研究领域[WOS]	Biotechnology & Applied Microbiology ; Chemistry, Multidisciplinary ; Engineering, Chemical
WOS记录号	WOS:000345845400012
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32766]
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	Tu, Jinjun,Yang, Zhendong,Hu, Chun. Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles[J]. JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,2015,90(1):80-86.
APA	Tu, Jinjun,Yang, Zhendong,&Hu, Chun.(2015).Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles.JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,90(1),80-86.
MLA	Tu, Jinjun,et al."Efficient catalytic aerobic oxidation of chlorinated phenols with mixed-valent manganese oxide nanoparticles".JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY 90.1(2015):80-86.