Superparamagnetic magnesium ferrite nanoadsorbent for effective arsenic (III, V) removal and easy magnetic separation

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	Superparamagnetic magnesium ferrite nanoadsorbent for effective arsenic (III, V) removal and easy magnetic separation
	W. S. Tang; Y. Su; Q. Li; S. A. Gao; J. K. Shang
	2013
发表期刊	Water Research
ISSN	0043-1354
卷号	47 期号:11 页码:3624-3634
摘要	By doping a proper amount of Mg2+ (similar to 10%) into alpha-Fe2O3 during a solvent thermal process, ultrafine magnesium ferrite (Mg0.27Fe2.50O4) nanocrystallites were successfully synthesized with the assistance of in situ self-formed NaCl "cage" to confine their crystal growth. Their ultrafine size (average size of similar to 3.7 nm) and relatively low Mg-content conferred on them a superparamagnetic behavior with a high saturation magnetization (32.9 emu/g). The ultrafine Mg0.27Fe2.50O4 nanoadsorbent had a high specific surface area of similar to 438.2 m(2)/g, and demonstrated a superior arsenic removal performance on both As(III) and As(V) at near neutral pH condition. Its adsorption capacities on As(III) and As(V) were found to be no less than 127.4 mg/g and 83.2 mg/g, respectively. Its arsenic adsorption mechanism was found to follow the inner-sphere complex mechanism, and abundant hydroxyl groups on its surface played the major role in its superior arsenic adsorption performance. It could be easily separated from treated water bodies with magnetic separation, and could be easily regenerated and reused while maintaining a high arsenic removal efficiency. This novel superparamagnetic magnesium ferrite nanoadsorbent may offer a simple single step adsorption treatment option to remove arsenic contamination from water without the pre-/post-treatment requirement for current industrial practice. (C) 2013 Elsevier Ltd. All rights reserved.
部门归属	[tang, wenshu ; su, yu ; li, qi ; gao, shian ; shang, jian ku] chinese acad sci, shenyang natl lab mat sci, inst met res, environm funct mat div, shenyang 110016, liaoning provin, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. ; li, q (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, environm funct mat div, 72 wenhua rd, shenyang 110016, liaoning provin, peoples r china. ; qili@imr.ac.cn
关键词	Arsenite/arsenate Adsorption Magnesium Ferrite Nanoadsorbent Superparamagnetic Magnetic Separation Nanocrystalline Titanium-dioxide Iron-oxide Adsorption Nanoparticles Sorption Adsorbents Goethite Hematite Sorbent Mgfe2o4
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71497
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. S. Tang,Y. Su,Q. Li,et al. Superparamagnetic magnesium ferrite nanoadsorbent for effective arsenic (III, V) removal and easy magnetic separation[J]. Water Research,2013,47(11):3624-3634.
APA	W. S. Tang,Y. Su,Q. Li,S. A. Gao,&J. K. Shang.(2013).Superparamagnetic magnesium ferrite nanoadsorbent for effective arsenic (III, V) removal and easy magnetic separation.Water Research,47(11),3624-3634.
MLA	W. S. Tang,et al."Superparamagnetic magnesium ferrite nanoadsorbent for effective arsenic (III, V) removal and easy magnetic separation".Water Research 47.11(2013):3624-3634.