Sequestration of Antimonite by Zerovalent Iron: Using Weak Magnetic Field Effects to Enhance Performance and Characterize Reaction Mechanisms

doi:10.1021/acs.est.5b05360

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Sequestration of Antimonite by Zerovalent Iron: Using Weak Magnetic Field Effects to Enhance Performance and Characterize Reaction Mechanisms
	Xu, CH; Zhang, BL; Zhu, LJ; Lin, S; Sun, XP; Jiang, Z; Tratnyek, PG; Xu, CH (reprint author), Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Shandong, Peoples R China.; Tratnyek, PG (reprint author), Oregon Hlth & Sci Univ, Inst Environm Hlth, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA.
	2016
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
卷号	50 期号:3 页码:1483—1491
文章类型	期刊文献
摘要	Many oxyanion-forming metals (As, Sb, Se, Tc, etc.) can be removed from water by adsorption and/or redox reactions involving iron oxides, including the oxides associated with zerovalent iron (ZVI). The rate of antimonite (Sb(III) hydrolysis species) removal by ZVI was determined in open, well-mixed batch reactors as a function of experimental factors, including aging of the ZVI, addition of Fe(II), Sb dose, mixing rate, pH, initial concentrations of Sb(III), etc. However, the largest effect observed was the roughly 6-8 fold increase in Sb(III) removal rate due to the application of a weak magnetic field (WMF) during the experiments. The WMF effect on Sb removal arises from stimulated corrosion and delayed passivation of the ZVI, as evidenced by time series correlation analysis of "geochemical" properties (DO, Fe-tot Eh, and pH) measured synchronously in each experiment. The removal of Sb under the conditions of this study was mainly due to Oxidation of Sb(III) to Sb(V) and adsorption and coprecipitation onto the iron oxides formed from accelerated corrosion of ZVI, as evidenced by Sb K-edge XANES, EXAFS, and XPS. The degree of the WMF enhancement for Sb(III) was found to be similar to the WMF effect reported previously for Sb(V), As (III), As (V), and Se (VI).
关键词	Zero-valent Iron Natural-waters Oxidative-degradation Polyvinyl-alcohol As(Iii) Oxidation Hydrogen-peroxide Arsenite Removal Aqueous-solution Adsorption Oxide
DOI	10.1021/acs.est.5b05360
收录类别	SCI
语种	英语
WOS记录号	WOS:000369471300047
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/25830
专题	中科院上海应用物理研究所2011-2018年
通讯作者	Xu, CH (reprint author), Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Shandong, Peoples R China.; Tratnyek, PG (reprint author), Oregon Hlth & Sci Univ, Inst Environm Hlth, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA.
推荐引用方式 GB/T 7714	Xu, CH,Zhang, BL,Zhu, LJ,et al. Sequestration of Antimonite by Zerovalent Iron: Using Weak Magnetic Field Effects to Enhance Performance and Characterize Reaction Mechanisms[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(3):1483—1491.
APA	Xu, CH.,Zhang, BL.,Zhu, LJ.,Lin, S.,Sun, XP.,...&Tratnyek, PG .(2016).Sequestration of Antimonite by Zerovalent Iron: Using Weak Magnetic Field Effects to Enhance Performance and Characterize Reaction Mechanisms.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(3),1483—1491.
MLA	Xu, CH,et al."Sequestration of Antimonite by Zerovalent Iron: Using Weak Magnetic Field Effects to Enhance Performance and Characterize Reaction Mechanisms".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.3(2016):1483—1491.

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