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Adsorption properties of microwave synthesized inorgano–organo montmorillonite
Author(s) -
Emreol Miray,
Soycan Nefset,
Yapar Saadet
Publication year - 2009
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.304
Subject(s) - intercalation (chemistry) , adsorption , montmorillonite , fourier transform infrared spectroscopy , clay minerals , phenol , materials science , infrared spectroscopy , microwave , thermal treatment , infrared , chemical engineering , chemistry , inorganic chemistry , mineralogy , organic chemistry , composite material , engineering , physics , optics , quantum mechanics
The aim of this study is to determine the adsorption properties of microwave synthesized inorgano–organo montmorillonites. Microwave irradiation is preferred because of its low time and energy consumption properties, forming an advantage in industrial applications. In addition to the intercalation of Keggin and hexadecyltrimethylammonium (HDTMA + ) cations, the aging process of pillaring solution was also carried out through the microwave irradiation. Both inorgano clays, namely the parents, and their inorgano–organo derivatives, were prepared by using the same amounts of aluminum by keeping the OH − /Al 3+ and Al 3+ /clay ratios constant. The HDTMA + /clay ratio was changed in inorgano‐organo clays (IOCs) during the preparation. The effects of these parameters on the surface properties and adsorption behaviors of the samples were investigated by conducting X‐ray diffraction (XRD), Fourier transform infrared (FTIR) and simultaneous thermal analyses (STA), as well as batch adsorption experiments, in which phenol was used as a model pollutant. The results of XRD analyses reveal that the intercalation is successfully achieved. The existence of the Keggin and HDTMA + cations was observed in FTIR spectra of the samples. Through the STA, it was determined that the existence of organic layer increases the dehydroxylation temperature and the thermal behavior of inorgano‐organo montmorillonites strongly depends on the structure of the parent clay. An increase in the adsorption efficiencies with increasing HDTMA + /clay ratio was observed, except with the highest ratio. The behavior of this sample was explained by the formation of the second HDTMA + layer leading to the hydrophilic surface formation. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.