摘要：

Experimental adsorption data at 20°C are given for six dilute aqueous bi-solute systems adsorbing on activated carbon. The three-parameter Toth adsorption isotherm gives good representation of the data for aqueous single-solute adsorption. Using the thermodynamic ideal-adsorbed-solution method, total and partial adsorptions are calculated for the bi-solute systems; agreement with experimental data is good. Prediction for total adsorption is within about 2–10% and for adsorption of individual components within about 3–20%. In the prediction calculations only single-solute data are used. A new three-parameter adsorption isotherm is presented. This new isotherm also represents the single-solute data well. For bi-solute systems where dissociation is negligible, calculated individual adsorptions agree with experiment within 2%. Systematic deviations between calculated and observed results may be due to the acidities of the solutes. In the future, adsorption experiments should be done under controlled pH conditions.

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