Study on the behavior of anion exchange resin for adsorbing phenol

The adsorption behavior of phenol with 717 strongly basi anion exchange resin were investigated.Experimental results show that the maximum adsorption ability of 717 resin occurs at pH = 10～13.The adsorption behavior of 717 resin for phenol obeys the Freundlich and Langmuir isotherms.At temperature of 293～313 K and the adsorption of phenol of 220～260 mg/g,the changes of adsorption enthalpy is-13.69～-12.02 kJ/mol,the free energy is-7.02～-7.21 kJ/mol,the entropy of adsorption is-22.76～-15.37 J/(K·mol).The adsorption kinetics data well fit the Lagergren pseudo-second order rate equation,the adsorption rate constant is 8.5×10-4～2.74×10-3 g/(mg·min) and the adsorption activity energy is 44.1 kJ/mol.The statically saturated adsorption capacity is 399.8 mg/g(4.253 mmol/g) at 303 K.Up to 99% of the phenol adsorbed in the resin can be easily and quickly eluted with a 0.05 mol/L HCl solution.