Fig. 7
a Langmuir adsorption isotherm of cefadroxil, b Freundlich adsorption isotherm of cefadroxil, c Langmuir adsorption isotherm of cefprozil, d Freundlich adsorption isotherm of cefprozil, e Langmuir adsorption isotherm of cefradine, and f Freundlich adsorption isotherm of cefradine on MSN at optimum conditions