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Characteristics of p-Xylene Adsorption using Functionalized Mesoporous Silica  

Kim, Sang-Hyoun (대구대학교 공과대학 환경공학과)
Park, Jonghoon (대구대학교 공과대학 환경공학과)
Kang, Seok-Tae (경희대학교 공과대학 토목공학과)
Chung, Jae-Woo (경남과학기술대학교 공과대학 환경공학과)
Kim, Soo-Hong ((주)에스지알테크)
Cho, Yunchul (대전대학교 공과대학 환경공학과)
Lee, Chae-Young (수원대학교 공과대학 토목공학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.13, no.6, 2012 , pp. 27-31 More about this Journal
Abstract
This study was designed to examine the feasibility of functionalized mesoporous silica as the adsorbent for benzene, toluene, ethylbenzene, and xylene isomers (BTEX) in groundwater. p-Xylene was used as the model compound of BTEX. A series of functionalized mesoporous silica with MCM-41 type of structure was synthesized using a co-condensation method. Monoamine, triamine, nitrile, phenyl, and octyl groups were functionalized to the mesoporous silica structure. Adsorption sites for p-Xylene in a functionalized mesoporous silica were Si-O-Si covalent bond, the surfactant, and the functional group. Octyl-functionalized mesoporous silica with stearyltrimethylammonium chloride as a surfactant showed the highest adsorption ability. The maximum xylene adsorption capacity of the octyl-functionalized mesoporous silica with stearyltrimethylammonium chloride based on Langmuir model was 4.17 mmol/g on $20^{\circ}C$, which was 2.9 times higher than that of MCM-41.
Keywords
Adsorption; Surfactant; functionalization; MCM-41; p-Xylene;
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