3.2.3 Investigating the effect of curcumin solution concentration on adsorption
To investigate the effect of curcumin concentration, first curcumin solutions with concentrations of 10, 30 and 50 ppm were prepared. As in the previous steps, the optimal amount of adsorbent was added to it and placed on the shaker at room temperature. Every 2 hours, it was sampled, centrifuged and sample wavelength was measured using a spectrophotometer.
Fig (7): Investigation of the effect of curcumin drug concentration on absorption.
The results in Fig (7) indicated, higher concentration of curcumin drug solution led to lower adsorption efficiency. It was also obtained curcumin solution at the highest concentration (ppm10) showed the highest absorption efficiency because at this concentration the amount of curcumin in the solution is less than the concentration of 30 and 50 and resulted, special surfaces, empty puros and many active sites still exist in the nanocomposite surface of the metal-organic framework that is not saturated and increases the efficiency of the metal-organic framework nanocomposite absorption.