Thermodynamic and Kinetic Studies of the Malachite Green Dye Adsorption on Nanocomposite Fe/TiO2 Shrimp Shell

In this study, nanocomposite Fe/TiO2-shrimpshell as adsorbent was synthesized. Fourier transform spectroscopy (FT-IR), X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM) and elemental analysis (EDX) were evaluated and the results showed the Fe3 doped TiO2 nanoparticles and the shell shrimp on Fe/TiO2. Adsorption Malachite green with effective parameters adsorption kinetics, adsorption isotherms and thermodynamic parameters were studied in depth. Based on the experimental results and correlation coefficients, malachite green dye adsorption kinetics pseudo second order and isotherms of Freundlich was adopted. The negative values of standard free energy (ΔG˚) suggest that the adsorption process is spontaneous. The value of enthalpy change (ΔH˚) indicates that the removal process is endothermic.