TY - JOUR
T1 - Synthesis, characterization and adsorption study of nano-sized activated alumina synthesized from kaolin using novel method
AU - Salahudeen, Nurudeen
AU - Ahmed, Abdulkarim S.
AU - Al-Muhtaseb, Ala'a H.
AU - Dauda, Mohammed
AU - Waziri, Saidu M.
AU - Jibril, Baba Y.
AU - Al-Sabahi, Jamal
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Synthesis and characterization of nano-sized activated alumina from kaolin using an innovative three-step method are presented. Adsorption study of the as-synthesized activated alumina using phenol solution as absorbate was carried out. The Brunauer-Emmett-Teller (BET) specific surface area, pore diameter and pore volume of the as-synthesized activated alumina were 202.3m2/g, 1.212nm and 0.0613cm3/g respectively. Chemical, mineralogical, morphological and thermal analyses of the as-synthesized activated alumina were carried out using X-ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The as-synthesized activated alumina possessed 83.47wt.% Al2O3. Its XRD pattern possessed characteristic peaks gamma phase of alumina. The as-synthesized activated alumina possessed nano-size morphology; having crystal size value of 12.5nm. It was thermally stable; the differential thermogravimetric (DTG) analysis showed that only 17wt.% mass depletion was observed for heating from 30 to 900°C. Adsorption isotherm of the as-synthesized activated alumina using Freundlich, Langmuir and Dubinin-Radushkevich (D-R) models, gave coefficients of determination of 0.948, 0.962 and 0.867 respectively. The Kf, b, and Kads isotherm constants for were 0.934mg/g, 0.0116L/mg and 2.05×10-5mol2/kJ2 for the Freundlich, Langmuir and D-R models respectively.
AB - Synthesis and characterization of nano-sized activated alumina from kaolin using an innovative three-step method are presented. Adsorption study of the as-synthesized activated alumina using phenol solution as absorbate was carried out. The Brunauer-Emmett-Teller (BET) specific surface area, pore diameter and pore volume of the as-synthesized activated alumina were 202.3m2/g, 1.212nm and 0.0613cm3/g respectively. Chemical, mineralogical, morphological and thermal analyses of the as-synthesized activated alumina were carried out using X-ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The as-synthesized activated alumina possessed 83.47wt.% Al2O3. Its XRD pattern possessed characteristic peaks gamma phase of alumina. The as-synthesized activated alumina possessed nano-size morphology; having crystal size value of 12.5nm. It was thermally stable; the differential thermogravimetric (DTG) analysis showed that only 17wt.% mass depletion was observed for heating from 30 to 900°C. Adsorption isotherm of the as-synthesized activated alumina using Freundlich, Langmuir and Dubinin-Radushkevich (D-R) models, gave coefficients of determination of 0.948, 0.962 and 0.867 respectively. The Kf, b, and Kads isotherm constants for were 0.934mg/g, 0.0116L/mg and 2.05×10-5mol2/kJ2 for the Freundlich, Langmuir and D-R models respectively.
KW - Activated alumina
KW - Characterization
KW - Isotherm study
KW - Precipitation
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U2 - 10.1016/j.powtec.2015.04.024
DO - 10.1016/j.powtec.2015.04.024
M3 - Article
AN - SCOPUS:84929379449
SN - 0032-5910
VL - 280
SP - 266
EP - 272
JO - Powder Technology
JF - Powder Technology
ER -