TY - JOUR ID - 3429 TI - Biosorption of As(III) from aqueous solution by Acacia auriculiformisleaves JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Al-Mamun, Mohammad AU - Poostforush, Mohammad AU - Mukul, Sharif Ahmed AU - Parvez, Md. Khaled AU - Subhan, Md. Abdus AD - aSchool of Physical Sciences, Department of Chemistry, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh AD - bDepartment of Polymer Engineering, Islamic Azad University, South Tehran Branch, Tehran-11365-4435, Iran AD - cSchool of Agriculture and Food Sciences, The University of Queensland, Brisbane Qld 4072, Australia AD - Synthetic Chemistry Group, Max Planck Institute for Polymer Research, Ackermannweg 10, Y1 - 2013 PY - 2013 VL - 20 IS - 6 SP - 1871 EP - 1880 KW - Arsenic KW - Biosorption KW - Acacia auriculiformis KW - Langmuir isotherm KW - FTIR DO - N2 - The biosorption capability of Acacia (Acacia auriculiformis A.Cunn.exBenth.) leaf powder in batch and small scale column was investigated. The adsorption properties were analyzed with different 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. auriculiformisleaf powder was calculated to be 41.410 μg g-1. The kinetic data were well fitted by pseudo-first-order model with the correlation coefficient greater than 0.989. Surface morphology of the biosorbent was analyzed by scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) was employed to characterize the surface functional groups of A. auriculiformisleaf powder.The activation energy (Ea) and heat of biosorption (∆H) were calculated to be 27.549 and 43.380 kJ mol-1 respectively. The thermodynamic parameters such as Gibbs free energy (∆G), enthalpy (∆H), and entropy (∆S) revealed the spontaneous nature of the biosorption followed by physical activated process. Small scale column tests (SSCT) were also conducted to find out the breakthrough characteristics of the column packed with biosorbent. UR - https://scientiairanica.sharif.edu/article_3429.html L1 - https://scientiairanica.sharif.edu/article_3429_3e99822e66b92b619bff2842c87193bf.pdf ER -