Exceptional arsenic adsorption performance of hydrous cerium oxide nanoparticles: Part A. Adsorption capacity and mechanism

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	Exceptional arsenic adsorption performance of hydrous cerium oxide nanoparticles: Part A. Adsorption capacity and mechanism
	R. H. Li; Q. Li; S. Gao; J. K. Shang
	2012
发表期刊	Chemical Engineering Journal
ISSN	1385-8947
卷号	185 页码:127-135
摘要	Hydrous cerium oxide (HCO) nanoparticles were synthesized by a simple precipitation process, and their arsenic adsorption performances were investigated. Due to their high specific surface area (198 m(2)/g) and the presence of high affinity surface hydroxyl groups, HCO nanoparticles demonstrated exceptional adsorption properties in terms of adsorption capacity and kinetics on both As(III) and As(V). At neutral pH, the arsenic adsorption capacity of HCO reached over 170 mg/g for As(III) and 107 mg/g for As(V). Even at very low equilibrium arsenic concentrations, the amount of As(III) and As(V) adsorbed by HCO nanoparticles was still over 13 mg/g at 10 mu g/L and over 40 mg/g at 50 mu g/L, which are higher than the arsenic adsorption capacity for most commercial adsorbents. Over a wide pH range from 3 to 11, HCO nanoparticles could readily remove As(III) by adsorption, which was not observed previously on other arsenic adsorbents. Such exceptional arsenic adsorption properties by HCO nanoparticles were shown to derive from the strong inner-sphere complexion. (c) 2012 Published by Elsevier B.V.
部门归属	[li, ronghui; li, qi; gao, shian; shang, jian ku] chinese acad sci, inst met res, mat ctr water purificat, shenyang natl lab mat sci, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa.;shang, jk (reprint author), chinese acad sci, inst met res, mat ctr water purificat, shenyang natl lab mat sci, shenyang 110016, peoples r china.;jkshang@illinois.edu
关键词	Hydrous Cerium Oxide Nanoparticles Exceptional Arsenic Removal Ability Adsorption Mechanism Granular Ferric Hydroxide Titanium-dioxide Removal Adsorbent Oxidation Groundwater Kinetics Sorption Water Ceo2
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60063
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. H. Li,Q. Li,S. Gao,et al. Exceptional arsenic adsorption performance of hydrous cerium oxide nanoparticles: Part A. Adsorption capacity and mechanism[J]. Chemical Engineering Journal,2012,185:127-135.
APA	R. H. Li,Q. Li,S. Gao,&J. K. Shang.(2012).Exceptional arsenic adsorption performance of hydrous cerium oxide nanoparticles: Part A. Adsorption capacity and mechanism.Chemical Engineering Journal,185,127-135.
MLA	R. H. Li,et al."Exceptional arsenic adsorption performance of hydrous cerium oxide nanoparticles: Part A. Adsorption capacity and mechanism".Chemical Engineering Journal 185(2012):127-135.