doi: 10.7763/IJESD.2012.V3.192
Characteristics of Thiol-Functionalized Mesoporous Silica and its Application to Silver and Cadmium Ion Removal
Jayhyun Park1
,
Hyunjung Kim2,* ,
Jaikoo Park3,*
- 1the R&D Team, Institute of Mine Reclamation Corporation, Coal Center, 30 Chungjin-dong, Jongno-gu, Seoul 110-727, Republic of Korea
- 2Department of Mineral Resources and Energy Engineering, Chonbuk National University, 664-14 Duckjin-Dong 1Ga, Duckjin-Gu, Jeonju, Jeonbuk 561-756, Republic of Korea
- 3the Department of Natural Resources and Environmental Engineering, Hanyang University, #17 Heangdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea
Abstract
An uptake of silver and cadmium from aqueous solutions by ion exchange on functionalized large pore mesoporous silica has been studied. Mesoporous silica with large pore (about 6nm) was synthesized by condensation of siliceous solution using nonionic oligomeric polyethylene glycol block copolymer (P123) as surfactant in acidic medium and was functionalized by 3-mercaptopropyltrimetoxysilane (MPTMS) on surface of silica for good selectivity and high adsorption capacity. The result of nitrogen gas adsorption (BET) and transition electron microscopy (TEM) show that silica adsorbate have ordered mesoporous structure with uniform pore size distribution. 29Si MAS NMR, TG and FT-IR confirm the functionalization of MPTMS on the surface of mesoporous silica. The removal efficiency of metal in various concentration of metal cations in aqueous solution was investigated and it is determined that in various concentration range, adsorption amount of metal cations on mesoporous silica match to Freundlich and Henry adsorption isotherm data which are used for calculation of ion exchange parameter.
Keywords
- Silver
- adsorption
- mesoporous
- thiol
How to Cite
Jayhyun Park, Hyunjung Kim, and Jaikoo Park, "Characteristics of Thiol-Functionalized Mesoporous Silica and its Application to Silver and Cadmium Ion Removal," International Journal of Environmental Science and Development, vol. 3, no. 2, pp. 81-85, 2012. https://doi.org/10.7763/IJESD.2012.V3.192
Copyright & License
Copyright © 2012 by the authors. 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 (CC BY 4.0).