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Batch adsorption of Fe (III) from aqueous solution by aluminum oxide nanopowder was studied in batch system. The removal efficiency (99.9%) was obtained at pH 4 and 50 min contact time. The results indicate that the process follows Langmuir isotherm and pseudo-second-order kinetics model. As well as the thermodynamic data indicated that the exothermic nature process. The values of enthalpy (ΔH°), mean free energy (E) and activation energy (Ea) indicate that the adsorption process is physical sorption.