Adsorption of uranium with multiwall carbon nanotubes modified by formaldehyde

被引：0
|
作者：
Liu, Shu-Juan [1 ,2 ]
Li, Jin-Ying [2 ]
Luo, Ming-Biao [1 ]
Hua, Rong [1 ]
Lin, Hai-Lu [1 ]
Ma, Jian-Guo [1 ]
机构：
[1] State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China Institute of Technology, Nanchang 330013, China
[2] Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
来源：
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2013年 / 47卷 / 01期
关键词：
Multiwalled carbon nanotubes (MWCN) - Uranium - Adsorption isotherms - Ionic strength - Yarn - Formaldehyde;
D O I：
10.7538/yzk.2013.47.01.0007
中图分类号：
学科分类号：
摘要：
Purified multiwall carbon nanotubes (MWCNTs) were modified with formaldehyde and the dispersibility of MWCNTs was greatly improved after modification. The modified MWCNTs were used to study the adsorption of uranium from aqueous solution. pH, contact time, temperature, initial concentration of uranium and modified MWCNTs concentrations were investigated to estimate the adsorptive properties. The results show that uranium adsorption percentage strongly depends on the pH, initial concentration of uranium and modified MWCNTs content, and is slightly influenced by contact time, temperature and ionic strength. The adsorptivity increases over the range of pH=2.0-7.0. The maximum adsorptivity is 46.44 mg/g as the initial concentration of uranium reaches 50 μg/mL. The equilibrium data obey both Langmuir and Freundlich isotherms well, and the maximal theoretical adsorption capacity is 55.87 mg/g for the modified MWCNTs.
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页码：7 / 13
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