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Preparation of ethylenediamine-modified magnetic chitosan complex for adsorption of uranyl ions

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成果类型:
期刊论文
作者:
Wang, Jing-song;Peng, Rui-ting;Yang, Jin-hui;Liu, Yao-chi;Hu, Xin-jiang
通讯作者:
Wang, J.-S.
作者机构:
[Yang, Jin-hui; Peng, Rui-ting; Wang, Jing-song] School of Urban Construction, University of South China, Hengyang, Hunan 421001, China
[Yang, Jin-hui; Peng, Rui-ting; Wang, Jing-song] Key Discipline Lab. of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
[Liu, Yao-chi] School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
[Hu, Xin-jiang] College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
通讯机构:
[Wang, Jing-song] Univ S China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China.
School of Urban Construction, University of South China, China
语种:
英文
关键词:
Adsorption;Chitosan;Magnetic;Modified;Uranyl ions
期刊:
Carbohydrate Polymers
ISSN:
0144-8617
年:
2011
卷:
84
期:
3
页码:
1169-1175
基金类别:
National Natural Science Foundation of China [20707008, 51074192]; Hunan Provincial Education Department [06B082]; Construct Program of the Key Discipline in Hunan Province
机构署名:
本校为第一且通讯机构
院系归属:
土木工程学院
核资源工程学院
摘要:
Ethylenediamine-modified magnetic chitosan (EMMC) complex was developed as a novel magnetic adsorbent for the removal of uranyl ions. XRD spectrum indicated that the magnetic particles were pure Fe<inf>3</inf>O<inf>4</inf> with a spinel structure, and the binding of chitosan did not result in a phase change. IR analysis demonstrated that Fe<inf>3</inf>O<inf>4</inf> particles were successfully bounded by chitosan and more amino groups appeared in the EMMC samples. EMMC was found to be quite efficient to adsorb uranyl ions at pH 2-7. Equilibrium was established within 30 min, and the kinetic experimental data properly correlated with the pseudo-second-order kinetic model, indicating that the chemical sorption is the rate-limiting step. The adsorption data could be best interpreted by the Sips model with a maximum adsorption capacity of 82.83 mg U g<sup>-1</sup>. The EMMC can be regenerated with high efficiency, suggesting that this adsorbent is satisfactory to reuse uranyl ions. &copy;2011 Elsevier Ltd. All rights reserved.

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