Abstract:
Effects of temperature and ionic strength (NaCl) on the adsorption of erythromycin A (EA) in macroporous resin were studied via batch experiments. Results showed that the highest equilibrium adsorption capacity was obtained when SP825 macroporous resin was employed. The data were well described by Langmuir isotherm equation. The saturation adsorption quantity increases with the increasing of temperature and ionic strength. Meanwhile, free energy, enthalpy and entropy of the adsorption were calculated which indicated that the adsorption process was physical endothermic. Furthermore, the dynamic adsorption data were well described by film and pore diffusion models, and the film diffusion coefficient kf and pore diffusion coefficient Dp were thus calculated. The preliminary explanation for the effects of ionic strength and temperature on the adsorption process were discussed based on those kinetic and thermodynamic data.