Adsorption properties of modified activated carbon for 2-dichloroethane

To study the adsorption characteristics of organic vapor on modified activated carbon,commercial activated carbon was treated separately with 1 mol/L nitric acid,1 mol/L sulfuric acid,1 mol/L hydrochloric acid at 600,700 and 800 ℃.Physicochemical properties of these modified activated carbons were described by Boehm titration;Fourier transformed infrared spectroscopy(FTIR) and BET surface area measurement.The adsorption experiments were conducted with 2-dichloroethane acting as adsorbate.The results show that the total amount of acid groups increase after acid modification,while the amount of basic groups increases after heating modification;heating modification is more effective than acid modification for optimizing pore structure of activated carbon;increasing the effective pore volume is an effective way to improve adsorption capacity of 2-dichloroethane,while raising the surface functional groups can stimulate absorption effect of 2-dichloroethane.