According to Fig. 7a, the adsorption amounts of HM-IMs-5 and HM-NIMs-5 increased fast within the initial 50 min, and achieved 92.06% and 88.08% of the equilibrium capacity at 120 min, finally reached equilibrium within 6 h. HM-IMs-5 presented a much higher adsorption equilibrium capacity than HM-NIMs-5, owing to the specificity of imprinted cavity for BF. From Table 2, the kinetic data was fitted by pseudo-second-order kinetic model (R2 > 0.99) better than by pseudo-first-order kinetic model, which suggested that NHS-LC-Biotin the chemical process could be the rate-limiting step during the adsorption for BF . And the calculated Qe values (Qe,c) of pseudo-second-order kinetic equation were also close to the experimental data (Qe,e). The values of h and t1/2 in Table 2 also indicated glial cells the sorbents had excellent kinetic properties.
3.5. Adsorption equilibrium and isotherm modeling
Adsorption equilibrium constants for Langmuir and Freundlich isotherm equations.SorbentsLangmuir isotherm equationFreundlich isotherm equationKL (L μmol−1)Qm (μmol g−1)RLR2KF (μmol g−1)1/nR2HM-IMs-56.46 × 10−3131.780.60750.99691.45130.78640.9957HM-NIMs-54.61 × 10−3121.160.68450.99590.84050.83690.9916Full-size tableTable optionsView in workspaceDownload as CSV