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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; Guan, XH (reprint author), Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China.
2015
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume151Pages:276—283
Subtype期刊文献
AbstractWeak 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.
KeywordAntimony Adsorption Selenite Removal China Oxidation Kinetics Behavior Sb(Iii) Mobilization Performance Environment
Indexed BySCI
Language英语
WOS IDWOS:000360775200036
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24909
Collection中科院上海应用物理研究所2011-2019年
Corresponding AuthorGuan, XH (reprint author), Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China.
Recommended Citation
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,&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.
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