The experimental adsorption equilibrium data (Fig. 2) for AO7
adsorption on all supports were fitted using the Langmuir and
Freundlich isotherms. As shown in Table 2, the Langmuir model
fit the experimental data more reasonably. Fig. 2 and Table 2
showed that the adsorption capacity of ACFs-1700 was higher
than that of ACFs-1100 and ACFs-1300 and markedly increased
after impregnation with Fe(III). Therefore, the adsorption capacity