原子能科学技术2013，Vol.47Issue(1)：7-13,7.DOI:10.7538/yzk.2013.47.01.0007
甲醛改性多壁碳纳米管吸附铀的性能研究
Adsorption of Uranium With Multiwall Carbon Nanotubes Modified by Formaldehyde
摘要
Abstract
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.关键词
改性多壁碳纳米管/吸附/铀/吸附等温线Key words
modified MWCNTs/ adsorption/ uranium/ adsorption isotherm分类
化学化工引用本文复制引用
刘淑娟,李金英,罗明标,花榕,林海禄,马建国..甲醛改性多壁碳纳米管吸附铀的性能研究[J].原子能科学技术,2013,47(1):7-13,7.基金项目
江西省自然科学基金资助项目(2010GZH0012) （2010GZH0012）
东华理工大学核资源与环境重点实验室开放基金资助项目(101119,081214) （101119,081214）
