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Mg-doping: a facile approach to impart enhanced arsenic adsorption performance and easy magnetic separation capability to alpha-Fe2O3 nanoadsorbents
W. S. Tang; Y. Su; Q. Li; S. Gao; J. K. Shang
2013
Source PublicationJournal of Materials Chemistry A
ISSN2050-7488
Volume1Issue:3Pages:830-836
AbstractUltrafine superparamagnetic magnesium ferrite nanocrystallites were successfully synthesized by doping Mg2+ into alpha-Fe2O3 in a solvent thermal process. The dopant altered the microstructure of the alpha-Fe2O3 which resulted in an enhanced arsenic adsorption performance and an easy magnetic separation capability. At a concentration of 10%, Mg-doping largely increased the surface area to similar to 438 m(2) g(-1), enhanced the dispersion and contact with arsenic species in water due to its superparamagnetic behavior, and largely improved the arsenic adsorption performance in both lab-prepared and natural water samples at near neutral pH when compared with ultrafine alpha-Fe2O3 nanoparticles. At an Mg concentration of 10%, the amounts of As(III) and As(V) adsorbed reached 9.3 mg g(-1) and 10 mg g(-1), respectively, at a low equilibrium arsenic concentration of less than 10 mu g L-1. The nanocrystallites could be easily separated from water when an external magnetic field was present after water treatment due to their high saturation magnetization, which solved the potential nanomaterial dispersion problem and facilitated arsenic desorption and reuse of the material.
description.department[tang, wenshu ; su, yu ; li, qi ; gao, shian ; shang, jian ku] chinese acad sci, mat ctr water purificat, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. ; tang, ws (reprint author), chinese acad sci, mat ctr water purificat, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; qili@imr.ac.cn
KeywordOxide Adsorbent Aqueous-solution Removal Oxidation Water Speciation Hematite Sorption Iron Nanocrystals
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71496
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
W. S. Tang,Y. Su,Q. Li,et al. Mg-doping: a facile approach to impart enhanced arsenic adsorption performance and easy magnetic separation capability to alpha-Fe2O3 nanoadsorbents[J]. Journal of Materials Chemistry A,2013,1(3):830-836.
APA W. S. Tang,Y. Su,Q. Li,S. Gao,&J. K. Shang.(2013).Mg-doping: a facile approach to impart enhanced arsenic adsorption performance and easy magnetic separation capability to alpha-Fe2O3 nanoadsorbents.Journal of Materials Chemistry A,1(3),830-836.
MLA W. S. Tang,et al."Mg-doping: a facile approach to impart enhanced arsenic adsorption performance and easy magnetic separation capability to alpha-Fe2O3 nanoadsorbents".Journal of Materials Chemistry A 1.3(2013):830-836.
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