Efficient selenate removal by zero-valent iron in the presence of weak magnetic field

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	Efficient selenate removal by zero-valent iron in the presence of weak magnetic field
	Liang, LP; Guan, XH; Huang, YY; Ma, JY; Sun, XP; Qiao, JL; Zhou, GM
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2015
卷号	156 页码:1064—1072
关键词	ZEROVALENT IRON ADSORPTION MECHANISMS SELENITE REMOVAL REDUCTION WATER SORPTION PH SULFATE OXIDES SE(VI)
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	Se(VI) was very refractory to be removed by zero-valent iron (ZVI), therefore weak magnetic field (WMF) was employed to achieve efficient Se(VI) removal by ZVI. Batch experiments showed that negligible Se (VI) (<4%) was removed by ZVI without the application of WMF within 72 h. The presence of WMF dramatically enhanced Se(VI) sequestration by ZVI and complete removal of 10.0 mg L-1 Se(VI) was achieved by ZVI in 90 min. The main portion of kinetics of Se(VI) removal by ZVI in the presence of WMF followed zero-order rate law and the rate constants of Se(VI) sequestration by ZVI increased progressively with increasing the ZVI dosage. Fe K-edge XAFS spectra and synchrotron radiation-XRD analysis revealed that ZVI was transformed to X-ray amorphous Fe304 before finally transformed to lepidocrocite (7-Fe0OH). The LCF analysis of Se K-edge XANES spectra indicated that adsorptive removal of Se(VI) was minor but adsorption of Se(VI) to the corroded ZVI surface was the first step of Se(VI) removal. Se(VI) was rapidly reduced to Se(IV), which could be further transformed to Se(0). Comparison of the performance of Se(VI) removal in the literature suggested that employing WMF to enhance Se(VI) removal by ZVI under oxic conditions be a promising method. (C) 2015 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000366538000021
公开日期	2016-03-08
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/24912]
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	Liang, LP,Guan, XH,Huang, YY,et al. Efficient selenate removal by zero-valent iron in the presence of weak magnetic field[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2015,156:1064—1072.
APA	Liang, LP.,Guan, XH.,Huang, YY.,Ma, JY.,Sun, XP.,...&Zhou, GM.(2015).Efficient selenate removal by zero-valent iron in the presence of weak magnetic field.SEPARATION AND PURIFICATION TECHNOLOGY,156,1064—1072.
MLA	Liang, LP,et al."Efficient selenate removal by zero-valent iron in the presence of weak magnetic field".SEPARATION AND PURIFICATION TECHNOLOGY 156(2015):1064—1072.