Thermodynamics and Kinetic Study for Removal of Rhodamine B Dye from Aqueous Solution by CoMo/γ.Al2O3 Nano composite

Abstract

The (CoMo/Al₂O₃)  was used for the adsorption of Rhodamine B from aqeous solution . The Nano γ.Al₂O₃ as support was prepared by Co-Precipitation method from Aluminium Chlorides hexahydrate (AlCl₃.6H₂O) and calcination at temperature of 550 ºC. Then CoMo/γ.Al₂O₃ nanocomposite was prepared by impregnation method were  the  source of  Cobalt was Cobalt nitrate (Co(NO₃)₂) and ammonium  hepta  Molybdate  was the source of Molybdate on the prepared Nano γ.Al₂O₃ support with Calcination at a temperature 550 ºC.

They are characterized by FTIR , XRD , FESEM techniques also (BET) techniques was used for mesure the surface area of the nano catalyst.The results shows that the best  conditions for adsorption  were (pH 2) at a (0.25 g/L) dose with in (40) minutes of contact time. The thermodynamic studies showed that the process is endothermic and spontaneous. The kinetic was described by pseudo-second-order. The equilibrium adsorption data fitted the Freundlich isotherm well.