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Journal of Nanomaterials
Volume 2013 (2013), Article ID 689214, 9 pages
http://dx.doi.org/10.1155/2013/689214
Research Article

Adsorption of Eu(III) on oMWCNTs: Effects of pH, Ionic Strength, Solid-Liquid Ratio and Water-Soluble Fullerene

P. Liu,1 J. Wang,1 W. Qi,1 Zh. Li,2 JJ. Bi,1 and WS. Wu1,3

1Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, China
2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
3State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 73000, China

Received 30 May 2013; Accepted 7 July 2013

Academic Editor: Myoung-Woon Moon

Copyright © 2013 P. Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The influences of pH, ionic strength, solid-liquid ratio, , and on Eu(III) adsorption onto the oxidation multiwalled carbon nanotubes (oMWCNTs) were studied by using batch technique. The dynamic process showed that the adsorption of Eu(III) onto oMWCNTs could be in equilibrium for about 17 h and matched the quasi-second-order kinetics model. The sorption process was influenced strongly by pH changes and ionic strength. In the pH range of 1.0 to 4.0, the adsorption ratio increased with the increasing of pH values, then the adsorption of Eu(III) was almost saturated in the pH range of 4.0 to 10.0, and the adsorption ratio reached about 90%. The adsorption ratio decreased with the increasing of ionic strength. could promote the adsorption process obviously, but competed with Eu(III) for the adsorption sites, thus leading to the reducing of Eu(III) adsorption onto oMWCNTs. In the presence of or , the adsorption of Eu(III) onto oMWCNTs could be affected obviously by solid-liquid ratio and the initial concentration of Eu(III).