期刊论文

中文

原子能科学技术

1000-6931

2016

50

3

410-417

10.7538/yzk.2016.50.03.0410

国家自然科学基金资助项目（11275095）； 湖南省高校重点实验室开放基金资助项目（11K055）； 湖南省环境保护厅科技发展计划资助项目（湘财建指【2012】347号）；

本校为第一机构

对多壁碳纳米管(MWNTs)进行偕胺肟基改性,采用透射电子显微镜(TEM)和傅里叶变换红外光谱仪(FTIR)进行表征,研究了改性前后MWNTs在不同条件下对铀的吸附性能。结果表明,在pH=2~8的范围内,未改性的碳纳米管(raw-MWNTs)与偕胺肟基改性碳纳米管(AO-MWNTs)对铀的吸附容量均是先增大后降低,pH值为5时达到最大。随着铀初始浓度的增大,raw-MWNTs和AO-MWNTs对铀的吸附容量逐渐升高。当铀初始浓度为10 mg/L时,AO-MWNTs对铀振荡吸附30 min后达到平衡,吸附容量可达18.93 mg/g,而raw-MWNTs对铀振荡吸附60 min后趋于稳定,吸附容量可达9.59 mg/g。AO-MWNTs对铀的吸附符合Langmuir和Freundlich模型,最大理论吸附...

AO-MWNTs were obtained through multi-walled carbon nanotubes (MWNTs) modified by amidoxime group, and characterized by transmission electron microscope (TEM) and fourier transform infrared spectrometer (FTIR). The adsorption experiments of uranium on the raw-MWNTs and AO-MWNTs were studied under different conditions. The results show that the adsorption capacities of uranium on raw-MWNTs and AO-MWNTs primarily increase and then decrease over the range of pH=2-8, and reach the maximum at pH=5. With the increase of initial concentration of uranium, the adsorption capacities of uranium on the two...