kinetic and thermodynamic study Removal of Methylene blue dye from aqueous solution by using Titanium Nano Oxide

Adsorption is believed to be one of the most effective and simpleast processes, and Titanium Nano Oxide various adsorbents have been tested to remove dye from water.In this study adsorbent prepared from as a natural, availability, inexpensiveness and the desired pores adsorbent. It has used to remove Methylene blue dye successfully from several aqueous solutions.The surface morphology studies using SEM proves that, it contains move pores which lead to develop more adsorption sites.[1]Methylene blue is classified as a hazardous and flammable dye, it can cause to environmental and water pollution specially in the industrial usage. It also can cause Irritation to eyes and skin, and nerve damage.Spectrophotometric technique was used for the measurement of concentration of dye before and after adsorption. The effect of various parameters such as pH, amount of adsorbent, size of adsorbent particles, and contact time on removal processing was investigated.To investigate the mechanism of adsorption, several kinetic models were tested including Lagergren, pseudosecond-order, particle diffusion, film diffusion, and Elovich models. Adsorption isothermal data could be interpreted by the Langmuir, Freundlich, Tempkin, and Dubinin_Rudushkevich (DR) isothermmodels. The adsorption isotherm data employ to calculate the thermodynamic parameters like ΔG, ΔH and ΔS. [2]

کلیدواژه ها:

Adsorption ، Methylene blue dye ، Titanium Nano Oxide ، adsorption isotherms ، thermodynamics of adsorption