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Biosorption of As(III) from aqueous solution by Acacia auriculiformis leaves
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نویسنده
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Al-Mamun M. ,Poostforush M. ,Mukul S.A. ,Parvez K. ,Subhan A.
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منبع
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scientia iranica - 2013 - دوره : 20 - شماره : 6- C - صفحه:1871 -1880
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چکیده
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The biosorption capability of acacia (acacia auriculiformis a.cunn. exbenth.) leaf powder in batch and a small scale column was investigated. the adsorptionproperties were analyzed with di erent experimental variables, such as solution ph, amountof biosorbent, initial as(iii) concentration and temperature. the maximum adsorption wasobserved at ph 6.0, while the equilibrium was attained in 5 h. langmuir and freundlichequilibrium adsorption isotherm models were utilized for tting the experimental data. themaximum adsorption capacity of a. auriculiformis leaf powder was calculated to be 41.410g g??1. the kinetic data were well tted using a pseudo-rst-order model with a correlationcoecient greater than 0.989. the surface morphology of the biosorbent was analyzed usingscanning electron microscopy (sem). fourier transform infrared spectroscopy (ftir) wasemployed to characterize the surface functional groups of a. auriculiformis leaf powder.the activation energy (ea) and heat of biosorption (h) were calculated to be 27.549and 43.380 kj mol??1, respectively. the thermodynamic parameters, such as gibbs freeenergy (g), enthalpy (h), and entropy (s), revealed the spontaneous nature of thebiosorption followed by a physical activated process. small scale column tests (ssct)were also conducted to discover the breakthrough characteristics of the column packed withbiosorbent.
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کلیدواژه
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Arsenic; ,Biosorption; ,Acacia auriculiformis; ,Langmuir isotherm; ,FTIR.
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آدرس
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Shahjalal University of Science and Technology,, MS degrees in Chemistry from Shahjalal University of Scienceand Technology, Bangladesh, Bangladesh., islamic azad university, MS degree in Polymer Engineering, in 2009, from the Islamic Azad University, South Tehran Branch, in Iran , ایران, The University of Queensland, hD degree student at the University of Queensland, Australia., Max Planck Institute for Polymer Research, he is a PhD degree student in the Max Planck Institute for Polymer Research, Germany , Germany., Shahjalal University of Science and Technology,, Professor of Chemistry at Shah Jalal University of Science and Technology, Sylhet, Bangladesh, Bangladesh.
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پست الکترونیکی
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subhan-che@sust.edu
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Authors
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