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Influence of Surface Characteristics of Mesoporous Silica on Pb(II) and Cd(II) Adsorption Behavirous  

Lee, Ha-Young (Department of Environmental Science, Keimyung University)
Lee, Kamp-Du (Department of Environmental Science, Keimyung University)
Park, Sang-Won (Department of Environmental Science, Keimyung University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.6, 2008 , pp. 673-679 More about this Journal
Abstract
In this study, Mesoporous silica were prepared from hydrothermal synthesis using gel mixture of tetraethylorthosilcate (TEOS) as silica source and cetyltrimethylammonium bromide(CTMABr) as a template. In the optimum synthesis cause, molar ratio of template and silica changed. The surface and structure properties of Mesoporous silica were determined by XRD, SEM, and BET. N$_2$ adsorption isotherm characteristics, including the specific surface area(S$_{BET}$), total pore volume(V$_T$), and average pore diameter(D$_{BJH}$), were determined by BET. Also, the adsorption character of Pb(II) and Cd(II) ion on Mesoporous silica were measured using ICP. As a result, a SBET of 100$\sim$1,500 m$^2$/g was determined from the N$_2$ adsorption isotherm. Also, the average pore diameter of 2$\sim$4 nm. The adsorption of Pb ion and Cd ion on Mesoporous silica become different depending on the pH of solution. The adsorption amount of Mesoporus silica had higher than that of silicagel.
Keywords
Mesoporous Silica; MCM-48; Adsorption; Zeta Potential; Pb; Cd;
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