| Adsorption on activated carbon is widely used in organic Wastewater treatment. In this paper, adsorption of single component and competitive adsorption of two solutes, acetone and phenol, on activated carbon are studied to provide some fundamental information for further applications.For single component adsorption, the adsorption isotherms of acetone and phenol were measured at 30℃, 40℃, 50℃ on activated carbon 1, and at 30℃ on activated carbon 2. The data were correlated in terms of Freundlich equation satisfactorily. Under the same experimental condition, the adsorption amount of phenol is always higher than that of acetone. The difference in adsorption quantity between the two components on activated carbon 2 at 30℃ is small at low concentrations, such as initial concentrations lower than 5g/L, and increases sharply as the concentrations increase. Further more, activated carbon 1 with rich micropores adsorbs more solute than activated carbon 2 under the same condition, which indicates the dominant role of micropores in the adsorption of acetone and phenol.Moreover, the adsorption of bi-solute solution including acetone and phenol on activated carbon 2 at 30℃ was also investigated. The effect of competitive adsorption on each solute was studied by comparing a series of isotherms of one solute with the same initial concentration of the other, and the results showed that acetone has less influence on the adsorption of phenol than phenol does, which means the solute with low adsorption capacity contributes relatively less to the bi-solute adsorption. The multicomponent Freundlich equation may describe the bi-solute experimental results reasonably well.
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