Preparation of functionalized nanoporous carbons for uranium loading

被引：41

作者：

Jung, Yongju

Kim, Seok

Park, Soo-Jin

Kim, Ji Man ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Dept Chem, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, BK21 Sch Chem Mat Sci, Suwon 440746, South Korea

[3] Sungkyunkwan Univ, Funct Mat Lab, SKKU Adv Inst Nanotechnol, Suwon 440746, South Korea

[4] Korea Atom Energy Res Inst, Nucl Chem Res Div, Taejon 305353, South Korea

[5] Korea Res Inst Chem Technol, Adv Mat Div, Taejon 305600, South Korea

[6] Inha Univ, Dept Chem, Inchon 402751, South Korea

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2008年 / 313卷

关键词：

nanoporous carbons; uranium loading; functionalized carbons; carboxymethylated polyethyleneimine (CMPEI);

D O I：

10.1016/j.colsurfa.2007.04.112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ordered nanoporous carbons (CMK-3) with submicron-scale particle size were functionalized with carboxymethylated polyethyleneimine (CMPEI) as a new uranium loading material to increase uranium adsorption capacity, and characterized by Fourier transform-infrared spectroscopy (FT-IR) and powder X-ray diffraction (XRD). The adsorption isotherm of uranvl ions on the functionalized carbons was examined and evaluated using the Langmuir adsorption isotherm model. It was found that the adsorption of uranyl ions on the functionalized carbons follows the Langmuir isotherm model. The maximum uranium adsorption capacity of the adsorbent by the Langmuir model was calculated to be 151.5 mg U/g adsorbent. The loading stability of uranium on the adsorbent was examined at pH 4. It was observed that about 30% of uranium was released from CMPEI/CMK-3 within a day, however, uranium contents almost linearly decreased with a low desorption rate from I to 20 days. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：292 / 295

页数：4

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