2.5. Dye decolorization
To investigate the bleaching process of methylene blue cationic dye, a solution of methylene blue dye (10 mg / L) was prepared. Collected 100 ml of it as a sample and 0.1 gr of nanocomposite synthesized in the presence of hydrogen peroxide added and was subjected to ultrasound at room temperature for certain periods of time. Methylene blue concentration was measured at different times using a UV-vis light spectrometer. Finally, using equation (1) percent removal of methylene blue dye and using equation (2), the adsorption capacity of the magnetic organic-metallic framework composite was calculated and determined.
(1)
(2)
Where C0 and Ct , initial concentration of dye solution and concentration of dye solution at time t, V volume of solution in liters, m the amount of nano composite (gr) and qt adsorption capacity of nanocomposite magnetic metal-organic framework in terms (mg. g-1). Finally, the effect of different parameters on the removal of methylene blue dye was studied.