Biosorption of As(III) from aqueous solution by Acacia auriculiformis leaves

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Author(s)
Al-Mamun, M
Poostforush, M
Mukul, SA
Parvez, K
Subhan, A
Griffith University Author(s)
Year published
2013
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The biosorption capability of Acacia (Acacia auriculiformis A.Cunn. ex Benth.) leaf powder in batch and a small scale column was investigated. The adsorption properties were analyzed with di erent experimental variables, such as solution pH, amount of biosorbent, initial As(III) concentration and temperature. The maximum adsorption was observed at pH 6.0, while the equilibrium was attained in 5 h. Langmuir and Freundlich equilibrium adsorption isotherm models were utilized for fitting the experimental data. The maximum adsorption capacity of A. auriculiformis leaf powder was calculated to be 41.410 μg g^sup -1^. The kinetic ...
View more >The biosorption capability of Acacia (Acacia auriculiformis A.Cunn. ex Benth.) leaf powder in batch and a small scale column was investigated. The adsorption properties were analyzed with di erent experimental variables, such as solution pH, amount of biosorbent, initial As(III) concentration and temperature. The maximum adsorption was observed at pH 6.0, while the equilibrium was attained in 5 h. Langmuir and Freundlich equilibrium adsorption isotherm models were utilized for fitting the experimental data. The maximum adsorption capacity of A. auriculiformis leaf powder was calculated to be 41.410 μg g^sup -1^. The kinetic data were well fitted using a pseudo-first-order model with a correlation coefficient greater than 0.989. The surface morphology of the biosorbent was analyzed using Scanning Electron Microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) was employed to characterize the surface functional groups of A. auriculiformis leaf powder. The activation energy (E^sub a^) and heat of biosorption (ΔH) were calculated to be 27.549 and 43.380 kJ mol^sup -1^, respectively. The thermodynamic parameters, such as Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS), revealed the spontaneous nature of the biosorption followed by a physical activated process. Small Scale Column Tests (SSCT) were also conducted to discover the breakthrough characteristics of the column packed with biosorbent.
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View more >The biosorption capability of Acacia (Acacia auriculiformis A.Cunn. ex Benth.) leaf powder in batch and a small scale column was investigated. The adsorption properties were analyzed with di erent experimental variables, such as solution pH, amount of biosorbent, initial As(III) concentration and temperature. The maximum adsorption was observed at pH 6.0, while the equilibrium was attained in 5 h. Langmuir and Freundlich equilibrium adsorption isotherm models were utilized for fitting the experimental data. The maximum adsorption capacity of A. auriculiformis leaf powder was calculated to be 41.410 μg g^sup -1^. The kinetic data were well fitted using a pseudo-first-order model with a correlation coefficient greater than 0.989. The surface morphology of the biosorbent was analyzed using Scanning Electron Microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) was employed to characterize the surface functional groups of A. auriculiformis leaf powder. The activation energy (E^sub a^) and heat of biosorption (ΔH) were calculated to be 27.549 and 43.380 kJ mol^sup -1^, respectively. The thermodynamic parameters, such as Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS), revealed the spontaneous nature of the biosorption followed by a physical activated process. Small Scale Column Tests (SSCT) were also conducted to discover the breakthrough characteristics of the column packed with biosorbent.
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Journal Title
Scientia Iranica Transactions C: Chemistry and Chemical Engineering
Volume
20
Issue
6
Copyright Statement
© 2013 Sharif University of Technology. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Subject
Engineering
Materials engineering not elsewhere classified