Antimony(III) oxidation and antimony(V) adsorption reactions on synthetic manganite

doi:10.1016/j.chemer.2012.02.002

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	Antimony(III) oxidation and antimony(V) adsorption reactions on synthetic manganite
	Wang, XQ; He, MC; Lin, CY; Gao, YX; Zheng, L; Gao YX(高愈希); Zheng L(郑雷)
	2012
发表期刊	CHEMIE DER ERDE-GEOCHEMISTRY (IF:1.38[JCR-2016],1.766[5-Year])
卷号	72 期号:4 页码:41-47
摘要	Oxidation and adsorption processes critically affect the mobility of antimony (Sb) in the environment. Minerals such as manganese oxides appear to be important adsorbents or oxidants for Sb in soils and sediments. In this study, Sb oxidation and adsorption onto synthetic manganite (gamma-MnOOH) in aqueous suspensions were comprehensively investigated. The oxidation of Sb(III) by manganite occurred on a time scale of minutes and Sb(V) was released into the suspension as soon as the reaction began. X-ray absorption near edge structure (XANES) analyses showed that Sb(V) was the dominant species adsorbed on manganite, suggesting that manganite acts as a strong oxidant of Sb(III). The effects of temperature on the adsorption rates of Sb(V) were investigated. Thermodynamic parameters indicated that adsorption of Sb(V) by manganite is an exothermic process and is spontaneous at the specific temperatures investigated. A change in ionic strength from 0.001 to 0.1 M NaNO3 had little effect on the adsorption of Sb(V) onto manganite, indicating that Sb(V) forms inner-sphere complexes at the mineral surface. Anions such as phosphate, sulfate, silicate and carbonate, which may be present in natural waters, were ineffective competitors with Sb(V) for sorption sites. (C) 2012 Elsevier GmbH. All rights reserved.
关键词	Antimony Oxidation Adsorption Manganite XANES
学科领域	Geochemistry & Geophysics
DOI	10.1016/j.chemer.2012.02.002
收录类别	SCI ; ADS
WOS记录号	WOS:000307681100007
ADS Bibcode	2012ChEG...72...41W
ADS URL	https://ui.adsabs.harvard.edu/abs/2012ChEG...72...41W
ADS引文	https://ui.adsabs.harvard.edu/abs/2012ChEG...72...41W/citations
引用统计	正在获取... 被引频次：65 [ADS]
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/223782
专题	多学科研究中心
推荐引用方式 GB/T 7714	Wang, XQ,He, MC,Lin, CY,et al. Antimony(III) oxidation and antimony(V) adsorption reactions on synthetic manganite[J]. CHEMIE DER ERDE-GEOCHEMISTRY,2012,72(4):41-47.
APA	Wang, XQ.,He, MC.,Lin, CY.,Gao, YX.,Zheng, L.,...&郑雷.(2012).Antimony(III) oxidation and antimony(V) adsorption reactions on synthetic manganite.CHEMIE DER ERDE-GEOCHEMISTRY,72(4),41-47.
MLA	Wang, XQ,et al."Antimony(III) oxidation and antimony(V) adsorption reactions on synthetic manganite".CHEMIE DER ERDE-GEOCHEMISTRY 72.4(2012):41-47.