The adsorption dynamics for phenol in aqueous solution of the adsorbent based on polystyrene was studied.In order to distinguish with the Boyd quasi-homogeneous model of the inner structure of ion-exchanger,the particle diffusion model including surface diffustion model and porediffusion model was suggested which is suitable to the macroporous adsorbent.The diffusiondetermination step of the adsorption pocess was established and the effective diffusion coefficient was also determined.The influence of surface diffusion and pore difusion on the particle diffusion rate was investigated qualitatively.All of these were very important to improve the structure of the macroporous adsorbent in order to improve the mass-transfer rate.
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