Document Type: Original Article

Authors

Department of Chemistry, Kazerun Branch, Islamic Azad University, Kazerun, Iran

Abstract

This research focuses gamma alumina nanoparticles used for the adsorption of the cationic dye methyl red from aqueous solutions. Batch adsorption studies carried out to study various parameters included pH, gamma alumina nanoparticles dosage, and temperature and contact time. The concentration of dye methyl red measured using a UV-vis Spectrophotometer at the wavelength of 410 nm. The optimum adsorption conditions were found to be pH=3, adsorbent dose=0.04 g, temperature=298 K and contact time=50 min. The experimental results of this work compared with Langmuir, Friendlich and Tamkin's isotherm models. The results obtained from isotherm models showed that the surface adsorption of these dyes on the adsorbent used better follows the Langmuir isotherm model. Analysis of thermodynamic data showed that the adsorption process of the studied dyes on the adsorbent surface is spontaneous (The negativ value of ΔG0) and exothermic (The negativ value of ΔH0).



This research focuses gamma alumina nanoparticles used for the adsorption of the cationic dye methyl red from aqueous solutions. Batch adsorption studies carried out to study various parameters included pH, gamma alumina nanoparticles dosage, and temperature and contact time. The concentration of dye methyl red measured using a UV-vis Spectrophotometer at the wavelength of 410 nm. The optimum adsorption conditions were found to be pH=3, adsorbent dose=0.04 g, temperature=298 K and contact time=50 min. The experimental results of this work compared with Langmuir, Friendlich and Tamkin's isotherm models. The results obtained from isotherm models showed that the surface adsorption of these dyes on the adsorbent used better follows the Langmuir isotherm model. Analysis of thermodynamic data showed that the adsorption process of the studied dyes on the adsorbent surface is spontaneous (The negativ value of ΔG0) and exothermic (The negativ value of ΔH0).



 

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