Tamirat Dula - Academia.edu (original) (raw)

Tamirat Dula

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Papers by Tamirat Dula

Research paper thumbnail of Kinetic and Thermodynamic Study of Pb(II) and Zn(II) Ions Adsorption on Activated Carbon Prepared from Waste of Savannah Bamboo

Advanced Science, Engineering and Medicine, 2015

Research paper thumbnail of Kinetic and Thermodynamic Study of Pb(II) and Zn(II) Ions Adsorption on Activated Carbon Prepared from Waste of Savannah Bamboo

Advanced Science, Engineering and Medicine, 2015

Research paper thumbnail of Adsorption of Hexavalent Chromium from Aqueous Solution Using Chemically Activated Carbon Prepared from Locally Available Waste of Bamboo (Oxytenanthera abyssinica)

International Scholarly Research Notices, 2014

This study reports on the adsorption of Hexavalent Chromium from aqueous solutions using activate... more This study reports on the adsorption of Hexavalent Chromium from aqueous solutions using activated carbon prepared from bamboo (Oxytenanthera abyssinica) waste by KOH activation heating in an electrical furnace at 1073 K for 3 hrs. Batch adsorption experiments were also carried out as a function of pH, contact time, initial concentration of the adsorbate, adsorbent dosage, and temperature of the solution. Kinetic studies of the data showed that the adsorption follows the pseudo-second-order kinetic model. Thermodynamic parameters showed that adsorption on the surface of BWAC was feasible, spontaneous in nature, and exothermic between temperatures of 298 and 318 K. The equilibrium data better fitted the Freundlich isotherm model for studying the adsorption behavior of Hexavalent Chromium by BWAC. IR spectrum for loaded and unloaded BWAC was obtained using FT-IR spectrophotometer. Adsorption efficiency and capacity of Hexavalent Chromium were found to be 98.28% at pH 2 and 59.23 mg/g ...

Research paper thumbnail of Kinetic and Thermodynamic Study of Pb(II) and Zn(II) Ions Adsorption on Activated Carbon Prepared from Waste of Savannah Bamboo

Advanced Science, Engineering and Medicine, 2015

Research paper thumbnail of Kinetic and Thermodynamic Study of Pb(II) and Zn(II) Ions Adsorption on Activated Carbon Prepared from Waste of Savannah Bamboo

Advanced Science, Engineering and Medicine, 2015

Research paper thumbnail of Adsorption of Hexavalent Chromium from Aqueous Solution Using Chemically Activated Carbon Prepared from Locally Available Waste of Bamboo (Oxytenanthera abyssinica)

International Scholarly Research Notices, 2014

This study reports on the adsorption of Hexavalent Chromium from aqueous solutions using activate... more This study reports on the adsorption of Hexavalent Chromium from aqueous solutions using activated carbon prepared from bamboo (Oxytenanthera abyssinica) waste by KOH activation heating in an electrical furnace at 1073 K for 3 hrs. Batch adsorption experiments were also carried out as a function of pH, contact time, initial concentration of the adsorbate, adsorbent dosage, and temperature of the solution. Kinetic studies of the data showed that the adsorption follows the pseudo-second-order kinetic model. Thermodynamic parameters showed that adsorption on the surface of BWAC was feasible, spontaneous in nature, and exothermic between temperatures of 298 and 318 K. The equilibrium data better fitted the Freundlich isotherm model for studying the adsorption behavior of Hexavalent Chromium by BWAC. IR spectrum for loaded and unloaded BWAC was obtained using FT-IR spectrophotometer. Adsorption efficiency and capacity of Hexavalent Chromium were found to be 98.28% at pH 2 and 59.23 mg/g ...

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