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

被引：152

作者：

Wang, Jing-song ^{[1
,2
]}

Peng, Rui-ting ^{[1
,2
]}

Yang, Jin-hui ^{[1
,2
]}

Liu, Yao-chi ^{[3
]}

Hu, Xin-jiang ^{[4
]}

机构：

[1] Univ S China, Sch Urban Construct, Hengyang 421001, Hunan, Peoples R China

[2] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China

[3] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[4] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2011年 / 84卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Chitosan; Magnetic; Modified; Uranyl ions; Adsorption; METAL-IONS; REMOVAL; EQUILIBRIUM; BIOSORPTION; URANIUM; BEADS;

D O I：

10.1016/j.carbpol.2011.01.007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

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 Fe3O4 with a spinel structure, and the binding of chitosan did not result in a phase change. IR analysis demonstrated that Fe3O4 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(-1). The EMMC can be regenerated with high efficiency, suggesting that this adsorbent is satisfactory to reuse uranyl ions. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1169 / 1175

页数：7

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