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
ISSN0013-936X
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
DOI10.1021/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.
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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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