Application of amine-functionalised nano SBA-15 for removal of bichromate from aqueous solutions

被引:0
作者
Faghihian, H. [1 ]
Toghraei, M. [1 ]
机构
[1] Islamic Azad Univ, Dept Chem, Shahreza Branch, Shahreza, Isfahan, Iran
关键词
bichromate; adsorption thermodynamics; adsorption isotherms; adsorption kinetics; nano-SBA-15; amine-functionalised; MESOPOROUS SILICA; ACTIVATED CARBON; WATER SAMPLES; ADSORPTION; CHROMATE; CR(VI); CHROMIUM(VI); IONS; COPOLYMER; ZEOLITES;
D O I
10.1504/IJEP.2013.059918
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this research, molecular sieve SBA-15 was synthesised and functionalised with 3-aminopropyltrimethoxysilane (N-silane) and [1-(2-aminoethyl)-3-aminopropyl] trimethoxysilane (NN-silane). The materials were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR), and thermogravimetric analysis methods (TGA). The Brunauer-Emmett-Teller (BET) surface area of the samples was also measured. Bichromate adsorption behaviour of the resultant adsorbents was examined by a batch wise method. The effect of several variables such as contact time, pH, anion concentration and temperature on the adsorption capacity was studied and optimised. The adsorption results analysed by Freundlich and Langmuir isotherm models showed that the data was fitted by the Langmuir isotherm. Thermodynamic studies indicated that the adsorption process was endothermic and spontaneous in nature.
引用
收藏
页码:213 / 231
页数:19
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