Synthesis, characterization and adsorption study of nano-sized activated alumina synthesized from kaolin using novel method

Nurudeen Salahudeen, Abdulkarim S. Ahmed, Ala'a H. Al-Muhtaseb, Mohammed Dauda, Saidu M. Waziri, Baba Y. Jibril, Jamal Al-Sabahi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)266-272
Number of pages7
JournalPowder Technology
Volume280
DOIs
Publication statusPublished - Aug 1 2015

Fingerprint

Activated alumina
Kaolin
Adsorption
Thermogravimetric analysis
X ray diffraction
Aluminum Oxide
Phenol
Adsorption isotherms
Specific surface area
Diffraction patterns
Phenols
Fourier transform infrared spectroscopy
Isotherms
Alumina
Fluorescence
Transmission electron microscopy
Heating
X rays
Crystals
Scanning electron microscopy

Keywords

  • Activated alumina
  • Characterization
  • Isotherm study
  • Precipitation

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Synthesis, characterization and adsorption study of nano-sized activated alumina synthesized from kaolin using novel method. / Salahudeen, Nurudeen; Ahmed, Abdulkarim S.; Al-Muhtaseb, Ala'a H.; Dauda, Mohammed; Waziri, Saidu M.; Jibril, Baba Y.; Al-Sabahi, Jamal.

In: Powder Technology, Vol. 280, 01.08.2015, p. 266-272.

Research output: Contribution to journalArticle

Salahudeen, Nurudeen ; Ahmed, Abdulkarim S. ; Al-Muhtaseb, Ala'a H. ; Dauda, Mohammed ; Waziri, Saidu M. ; Jibril, Baba Y. ; Al-Sabahi, Jamal. / Synthesis, characterization and adsorption study of nano-sized activated alumina synthesized from kaolin using novel method. In: Powder Technology. 2015 ; Vol. 280. pp. 266-272.
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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

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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.

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