Kinetics and isotherm investigation of adsorption process of nickel oxide nanoparticles in edible dye removal from industrial effluent

Document Type : Original Article


Department of Chemistry, Faculty of Basic Sciences, Sistan and Baluchestan University, Zahedan, Iran


In this study, nickel oxide nanoparticles was prepared by co-precipitation method and characterized using FT-IR, XRD, VSM and SEM techniques. By Fourier transform infrared FT-IR has proven bond forming of NiO in nickel oxide. . X-ray diffraction (XRD) showed that the single-phase sample had a cubic symmetry with a particle size of 57 nm. Nickel oxide nanoparticles can be prepared as an efficient adsorbent for the removal of food color in aqueous solution. The highest removal percentage of food color, was in pH=7 and it‌,s concentration was 15 ppm. The obtained experimental data in optimum condition was used to model the behavior of absorption in isotherms equations such as: Langmuir, Freundlich, Langmuir-Freundlich and Toth. An examination of the Langmuer isotherm (R2=0.980) showed that the absorption of food color on the adsorbent surface was monolithic and uniform. The kinetics of adsorption interactions were examined. The obtained results showed that the adsorption data has the most conformity with, pseudo-second-order model.


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