Arsenic (III,V) removal from aqueous solution by ultrafine alpha-Fe(2)O(3) nanoparticles synthesized from solvent thermal method

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	Arsenic (III,V) removal from aqueous solution by ultrafine alpha-Fe(2)O(3) nanoparticles synthesized from solvent thermal method
	W. S. Tang; Q. Li; S. A. Gao; J. K. Shang
	2011
发表期刊	Journal of Hazardous Materials
ISSN	0304-3894
卷号	192 期号:1 页码:131-138
摘要	Ultrafine iron oxide (alpha-Fe(2)O(3)) nanoparticles were synthesized by a solvent thermal process and used to remove arsenic ions from both lab-prepared and natural water samples. The alpha-Fe(2)O(3) nanoparticles assumed a near-sphere shape with an average size of about 5 nm. They aggregated into a highly porous structure with a high specific surface area of similar to 162 m(2)/g, while their surface was covered by high-affinity hydroxyl groups. The arsenic adsorption experiment results demonstrated that they were effective, especially at low equilibrium arsenic concentrations, in removing both As(III) and As(V) from lab-prepared and natural water samples. Near the neutral pH, the adsorption capacities of the alpha-Fe(2)O(3) nanoparticles on As(III) and As(V) from lab-prepared samples were found to be no less than 95 mg/g and 47 mg/g, respectively. In the presence of most competing ions, these alpha-Fe(2)O(3) nanoparticles maintained their arsenic adsorption capacity even at very high competing anion concentrations. Without the pre-oxidation and/or the pH adjustment, these alpha-Fe(2)O(3) nanoparticles effectively removed both As(III) and As(V) from a contaminated natural lake water sample to meet the USEPA drinking water standard for arsenic. (C) 2011 Elsevier B.V. All rights reserved.
部门归属	[tang, wenshu; li, qi; gao, shian; shang, jian ku] chinese acad sci, inst met res, shenyang natl lab mat sci, mat ctr water purificat, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa.;li, q (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, mat ctr water purificat, shenyang 110016, peoples r china;qili@imr.ac.cn
关键词	Arsenite Arsenate Adsorption Competing Anions Alpha-fe(2)o(3) Nanoparticles Drinking-water Contaminated Water Iron-oxides Adsorption Hematite Sorption Ferrihydrite Adsorbents Speciation Goethite
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30703
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. S. Tang,Q. Li,S. A. Gao,et al. Arsenic (III,V) removal from aqueous solution by ultrafine alpha-Fe(2)O(3) nanoparticles synthesized from solvent thermal method[J]. Journal of Hazardous Materials,2011,192(1):131-138.
APA	W. S. Tang,Q. Li,S. A. Gao,&J. K. Shang.(2011).Arsenic (III,V) removal from aqueous solution by ultrafine alpha-Fe(2)O(3) nanoparticles synthesized from solvent thermal method.Journal of Hazardous Materials,192(1),131-138.
MLA	W. S. Tang,et al."Arsenic (III,V) removal from aqueous solution by ultrafine alpha-Fe(2)O(3) nanoparticles synthesized from solvent thermal method".Journal of Hazardous Materials 192.1(2011):131-138.

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