Effective Sb(V) immobilization from water by zero-valent iron with weak magnetic field

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	Effective Sb(V) immobilization from water by zero-valent iron with weak magnetic field
	Li, JL; Bao, HL; Xiong, XM; Sun, YK; Guan, XH
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2015
卷号	151 页码:276—283
关键词	ANTIMONY ADSORPTION SELENITE REMOVAL CHINA OXIDATION KINETICS BEHAVIOR SB(III) MOBILIZATION PERFORMANCE ENVIRONMENT
ISSN号	1383-5866
通讯作者	Guan, XH (reprint author), Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China.
英文摘要	Weak magnetic field (WMF) was employed to enhance Sb(V) immobilization by zero-valent iron (ZVI) at pHl(ini) 4.0 in this study. The kinetics of Sb(V) removal by ZVI followed pseudo-first-order reaction law. Without WMF, the rate constants dropped substantially with increasing the initial Sb(V) concentration ([Sb(V)]) from 5.0 to 40.0 mg/L. The application of a WMF increased the rate constants of Sb(V) sequestration by 5.56-7.71 times at [Sb(V)](ini) of 5.0-40.0 mg/L and enhanced the removal capacity of Sb(V) from 18.1 to 39.2 mg Sb(V)/g Fe. The co-existence of SO32-, NC3-, Cl-, CO32-, SiO32- and humic acid had minor influence on the removal efficiency of Sb(V) by ZVI when WMF was applied. The Fe K-edge XAFS, XRD and SEM results suggested that elevated [Sb(V)]ini could inhibit the corrosion of ZVI without WMF while the application of WMF could alleviate the passivation of ZVI by Sb(V) and thus promote the removal of Sb(V) by corroded ZVI. The Sb K-edge XAFS spectra implied the incorporation of Sb(V) into the structure of iron (hydr)oxides. Consequently, no release of Sb(V) at pH 3.0, 6.0 or 9.0 from the Sb(V)-treated ZVI was observed in 30 days. Considering the large removal capacity of Sb(V) with low residual Sb(V) concentration, no release of Sb(V) after its incorporation into the structure of iron (hydr)oxides and slight influence of co-existing solutes, it was concluded that coupling ZVI with WMF was an effective Sb(V) immobilization technology. (C) 2015 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000360775200036
公开日期	2016-03-08
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/24909]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Li, JL,Bao, HL,Xiong, XM,et al. Effective Sb(V) immobilization from water by zero-valent iron with weak magnetic field[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2015,151:276—283.
APA	Li, JL,Bao, HL,Xiong, XM,Sun, YK,&Guan, XH.(2015).Effective Sb(V) immobilization from water by zero-valent iron with weak magnetic field.SEPARATION AND PURIFICATION TECHNOLOGY,151,276—283.
MLA	Li, JL,et al."Effective Sb(V) immobilization from water by zero-valent iron with weak magnetic field".SEPARATION AND PURIFICATION TECHNOLOGY 151(2015):276—283.