3.2.4 Curcumin absorption kinetics study
To check the absorption rate, kinetic adsorption and interaction behavior between curcumin and synthesized metal-organic nanocomposites with weight percentages 30, 10, and 50, three kinetic models of first-order, second-order and intra-molecular adsorption were used (Fig.8). The kinetic variables of the surface adsorption process of curcumin by the magnetic metal-organic framework nanocomposites studied and presented in Table 5.
Fig (8): Investigation of kinetic absorption models
The quasi-second order were found to be better than the other two models for synthesized magnetic metal-organic frameworks nanocomposites because of the above equation, the R2 correlation coefficient for the quasi-second order is calculated. All coefficients are very close to one, while the two models of the quasi-first order and the intra-molecular diffusion, are more distant from the quasi-second order model, respectively.
So we can conclude curcumin absorption kinetics using a variety of synthesized nanocomposites follows the quasi-second order. On the other hand, the amount of (qe)Cal absorption obtained from the above equations in the kinetic model absorption is quasi-secondary order it is much closer to the experimental absorption of (qe) exp.
Table 6: Data obtained from the calculation of different synthetic adsorption models for different types of synthesized nanocomposites