Application of oxidized multi-wall carbon nanotubes for Th(IV) adsorption

被引：53
|
作者：
Chen, C. L.
Li, X. L.
Wang, X. K.
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] Hefei Univ Technol, Sch Chem Engn, Hefei 230009, Peoples R China
来源：
RADIOCHIMICA ACTA | 2007年 / 95卷 / 05期
基金：
中国国家自然科学基金;
关键词：
carbon nanotubes; oxidation adsorption; thorium(IV);
D O I：
10.1524/ract.2007.95.5.261
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Th(IV) adsorption onto oxidized multi-wall carbon nanotubes (MWCNTs) was carried out at 293 2 K. The effects of MWCNT concentration, pH, and ionic strength were studied. The results showed that Th(IV) adsorption onto oxidized MWCNTs strongly depended on MWCNT concentration and pH, and was weakly dependent on ionic strength. Oxidized MWCNTs showed a higher Th(IV) adsorption capacity than as-grown MWCNTs. The adsorption process followed pseudo second order kinetics. The Freundlich isotherm model described the data better than the Langmuir model. The adsorption mechanism of Th(IV) may be surface complexation. Oxidized MWCNTs may be a promising candidate for the concentration of Th(IV), or its analogue actinides from large volumes.
引用
收藏
页码：261 / 266
页数：6
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