期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 138, 期 1-3, 页码 184-190出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2010.09.007
关键词
Selective adsorption; Bisphenol A; Mesoporous silica; pi-pi interaction; Hydrogen-bonding
类别
资金
- Korean Ministry of Education, Science and Technology [R-01-2007-000-20690-0]
Organic-inorganic hybrid mesoporous material (Ph-MS) was synthesized by co-condensation of phenyltriethoxysilane and tetraethoxysilane. Ph-MS, which had pore size of 0.96 nm and surface area of 750 m(2)/g, exhibited mesoscopic orderness and suitable textural properties to act as a potential adsorbent for bisphenol A (BPA), which is one of the endocrine disrupting chemicals. Ph-MS adsorbed most amount of BPA faster than powder activated carbon (PAC), and the kinetic adsorption data for Ph-MS was fitted well with the pseudo-second-order kinetic model. Maximum adsorption capacities of adsorbents were estimated from isotherm data using Langmuir model. Ph-MS exhibited high adsorption affinity to BPA showing large adsorption capacity of 351 mg/g, while showing little adsorption affinity to phenol (40 mg/g). PAC, which is one of the general adsorbents for organic compounds, showed large adsorption capacity for both BPA (337 mg/g) and phenol (253 mg/g). Adsorption selectivity of Ph-MS, defined as a relative equilibrium distribution coefficient, K-RD, for BPA against phenol, was at least 5 times larger than that of PAC, showing high adsorption selectivity for BPA. The selective adsorption behavior of Ph-MS was discussed using the results of material characterizations including X-ray diffraction, N-2 adsorption/desorption measurements, and Fourier transform infrared spectroscopy, and the results of adsorption experiments. (C) 2010 Elsevier Inc. All rights reserved.
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