Preparation and Application of Chelating Polymer-Mesoporous Silica Composite for Europium-ion Adsorption

다국어 초록 (Multilingual Abstract)

Ordered mesoporous silica (MCM-48) functionalized with a carboxymethylated polyethyleneimine (CMPEI) was prepared and applied to adsorb Eu(III) ions. The samples were characterized by SEM, TEM, XRD and N_2 adsorption-desorption experiments. Adsorption studies of Eu(III) onto the MCM-48 and CMPEI-functionalized mesoporous silica, which are denoted as CMPEI/MCM-48, were performed by batch experiments. The adsorption of Eu(III) on the CMPEI/MCM-48 obeyed the Langmuir isotherm model. The CMPEI/MCM-48 exhibited much higher adsorption capacity at pH 3.0 to 5.0 compared to that of the pristine MCM-48. The Eu(III) adsorption of the CMPEI/MCM-48 increased with the pH. This was attributed mainly to a change in the chemical structure of CMPEI,which is strongly dependent on the solution pH. The XPS depth profiles showed that CMPEI was present on the mesopore walls inside the MCM-48 as well as on the surface of the particle, and further showed that a change in the Eu(III) content with etching time was not severe, indicating that the complexation of Eu(III) with CMPEI/MCM-48occurred uniformly, even inside the CMPEI/MCM-48. The overall results showed that the mesopore surface of MCM-48 was functionalized successfully with CMPEI and the resulting CMPEI/MCM-48 could be used as a proper adsorbent for the recovery of trivalent actinide species.

참고문헌 (Reference)

• 1 M. N. Delisee, 212 : 228-, 1999
• 2 Y. G. Kim, 38 : 924-, 2004
• 3 C. H. Jeong, 36 : 1089-, 2001
• 4 X. Wang, 64 : 414-, 2006
• 5 A. J. Fairhurst, 99 : 187-, 1995
• 6 S. Rengaraj, 87 : 273-, 2001
• 7 K. Tagami, 592 : 101-, 2007
• 8 K. E. Geckeler, 30 : 725-, 1996
• 9 B. F. Smith, 234 : 225-, 1998
• 10 W. Bisset, 55 : 109-, 2003
• 11 E. Gailliez-Degremont, 110 : 169-, 1996
• 12 M. Ghoul, 37 : 729-, 2003
• 13 A. Denizli, 55 : 121-, 2003
• 14 D. Leroy, 88 : 352-, 2003
• 15 S. Deng, 39 : 8490-, 2005
• 16 C. T. Kresge, 359 : 710-, 1992
• 17 J. S. Beck, 114 : 10834-, 1992
• 18 J. M. Kim, 259 : 1998
• 19 R. Ryoo, 103 : 7743-, 1999
• 20 K. Moller, 10 : 2950-, 1998
• 21 P. M. Lucildes, 383 : 79-, 2002
• 22 P. Liu, 35 : 1487-, 2002
• 23 L. Liu, 122 : 961-, 2007
• 24 C. L. Yi, 10 : 1505-, 2007
• 25 Y. Qiu, 10 : 1399-, 2007
• 26 Y. S. Ho, 37 : 2323-, 2003
• 27 Y. S. Al-Degs, 40 : 2645-, 2006
• 28 S. M. Depaoli, 36 : 941-, 2001