تحضير ودراسة ثرموديناميكية لامتزاز صبغة سطح الفحم النباتي على [1,1-Bi phenyl]-4,4diylbis- (azo)]-bis- [Resorcinol]

Abstract

Been prepared azo dye [1,1-Bi phenyl]-4,4diylbis- (azo)]-bis- [Resorcinol] and thermodynamic study on the adsorbed Surface of the Activated charcoal and select the contact time and concentration of equilibrium Spectrally by a UV-spectrophotometer, and applied the Langmair and Frendlich equations on the results obtained. The results showed that the adsorption on the surface of activated charcoal Following (Frendlich equation) of adsorption It is the type of S4 at a range of temperatures (298-328k), was also study the effect of temperature And pH in the adsorption of the dye on the surface of activated charcoal. The results showed that the amount of adsorption increases increasing the temperature which means that the adsorption(Endothermic)and increasing the alkalinity of the solution. The thermodynamic functions (ΔG º, ΔH º, ΔS º) of the dye for their adsorption have been calculated.