Abiotic oxidation of Mn(II) induced oxidation and mobilization of As(III) in the presence of magnetite and hematite

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	Abiotic oxidation of Mn(II) induced oxidation and mobilization of As(III) in the presence of magnetite and hematite
	Ren, Hai-Tao 1; Jia, Shao-Yi 1; Wu, Song-Hai 1; Liu, Yong 2; Hua, Chao 3; Han, Xu 4,5
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2013-06-15
卷号	254 期号:0 页码:89-97
关键词	Mn(II) oxidation As(III) Magnetite Hematite Mobilization
英文摘要	Manganese (hydr)oxides are powerful oxidants mediating the transformation of As(III) to As(V) under natural conditions, however, the presence of Mn(II) on the oxidation of As(III) in the pH range of 7.0-9.0 has not been reported so far. In this study, abiotic oxidation of Mn(II) to amorphous Mn(III, IV) (hydr)oxides (MnOx) on magnetite and hematite was confirmed, and the impact of newly formed MnOx on the fate of As(III) was investigated. With the addition of Mn(II) into As(III)-preloaded systems, the dissolved and the adsorbed As(III) was oxidized to As(V) at high pH, and Mn(II) mobilized the adsorbed As(III) and As(V) in hematite system. High production of dissolved As(V) and significant mobilization of As(III) were even more significant in hematite suspension (total As was 18.96 mg L-1 after 60 h at pH 8.62) with simultaneous addition of Mn(II) and As(III), while magnetite showed a higher capacity for the retention of As(III) and As(V). It could therefore be deduced that the newly formed MnOx on iron oxides could oxidize the dissolved and the adsorbed As(III) to As(V). In addition, the MnOx formed at high pH would take up the sorption sites previously occupied by the adsorbed As(III), and then mobilized a fraction of the adsorbed As(III) into solution. The present study reveals that MnOx formed via abiotic oxidation on iron oxides plays an important role in the oxidation and mobilization of both dissolved and adsorbed As(III) in aquatic environment. (C) 2013 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology
关键词[WOS]	MANGANESE OXIDES ; ARSENIC(III) OXIDATION ; SYNTHETIC BIRNESSITE ; ARSENATE ADSORPTION ; ARSENITE ; KINETICS ; SORPTION ; GROUNDWATER ; SURFACES ; IRON
收录类别	SCI
语种	英语
WOS记录号	WOS:000321079000011
公开日期	2015-05-27
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/13601]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 2.Tianjin Univ Technol, Sch Chem & Chem Engn, Tianjin, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing, Peoples R China 4.Tianjin Polytech Univ, State Key Lab Hollow Fiber Membrane Mat & Proc, Tianjin, Peoples R China 5.Tianjin Polytech Univ, Sch Environm & Chem Engn, Tianjin, Peoples R China
推荐引用方式 GB/T 7714	Ren, Hai-Tao,Jia, Shao-Yi,Wu, Song-Hai,et al. Abiotic oxidation of Mn(II) induced oxidation and mobilization of As(III) in the presence of magnetite and hematite[J]. JOURNAL OF HAZARDOUS MATERIALS,2013,254(0):89-97.
APA	Ren, Hai-Tao,Jia, Shao-Yi,Wu, Song-Hai,Liu, Yong,Hua, Chao,&Han, Xu.(2013).Abiotic oxidation of Mn(II) induced oxidation and mobilization of As(III) in the presence of magnetite and hematite.JOURNAL OF HAZARDOUS MATERIALS,254(0),89-97.
MLA	Ren, Hai-Tao,et al."Abiotic oxidation of Mn(II) induced oxidation and mobilization of As(III) in the presence of magnetite and hematite".JOURNAL OF HAZARDOUS MATERIALS 254.0(2013):89-97.