Oxidation of antimony (III) by amorphous iron and manganese oxyhydroxides

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	Oxidation of antimony (III) by amorphous iron and manganese oxyhydroxides
	Belzile, N; Chen, YW; Wang, ZJ
刊名	CHEMICAL GEOLOGY
	2001
卷号	174 期号:4 页码:379-387
关键词	oxidation amorphous iron and manganese oxyhydroxides antimony
英文摘要	Amorphous forms of natural and synthetic Fe oxyhydroxides and synthetic Mn oxyhydroxides were used to study the oxidation of antimonite, Sb(III), at different pH values. Sb species were measured by differential pulse adsorptive stripping voltametry (DPACSV). The oxidation of Sb(III) to Sb(V) was always rapid and completed after a few days following pseudo-first order rate laws. A slightly slower oxidation rate was observed at lower pH and was attributed to the lower stability of the oxyhydroxide compounds under mildly acidic conditions. The oxidation pseudo-first order rate of Sb(III) by natural Fe oxyhydroxides was also slower when compared to synthetic Fe compounds. This could be explained by a slight crystallinity of the natural oxides (when compared to amorphous synthetic compounds) and by their more complex chemical composition which can include adsorbed ions and organic matter. The study confirms that amorphous Fe and Mn oxyhydroxides present in natural waters and sediments can play a detoxifying role by adsorbing and oxidizing the more toxic Sb(III) into Sb(V). (C) 2001 Elsevier Science B.V. All rights reserved.
WOS记录号	WOS:000167488600001
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24086]
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	Belzile, N,Chen, YW,Wang, ZJ. Oxidation of antimony (III) by amorphous iron and manganese oxyhydroxides[J]. CHEMICAL GEOLOGY,2001,174(4):379-387.
APA	Belzile, N,Chen, YW,&Wang, ZJ.(2001).Oxidation of antimony (III) by amorphous iron and manganese oxyhydroxides.CHEMICAL GEOLOGY,174(4),379-387.
MLA	Belzile, N,et al."Oxidation of antimony (III) by amorphous iron and manganese oxyhydroxides".CHEMICAL GEOLOGY 174.4(2001):379-387.