Abstract:

The adsorption of two acids, 5-amino-2-chlorotoluene-4-sulfonic acid and hydrochloric acid from their solution onto weakly basic resin was investigated.The kinetics and isotherm were studied.The results indicated that the adsorption of 5-amino-2-chlorotoluene-4-sulfonic acid and hydrochloric acid all obeyed Langmuir isotherm, and was in good agreement with the second-order kinetics and the first-order kinetics models, respectively, and the adsorption process was pore diffusion controlled.Sorptive afinity of 5-amino-2-chlorotoluene-4-sulfonic acid on D301R was higher than hydrochloric acid.Thermodynamic parameters for the adsorption of acids were calculated and discussed.