عنوان مقاله [English]
The main objective of this study is Vanadium ion removal from industrial wastewater by Magnesium Oxide/chitosan nanocomposite and also, the investigation the optimal conditions of pH, agitation time, adsorbent dose and temperature. Morphology of Chitosan/ magnesium oxide nanocomposite and nanoparticle size and its distribution were studied by FTIR, XRD and FESEM, respectively. The adsorption studies performed in a batch system and the effect of various operating parameters such as solution pH (2-11), agitation time (15-300 min), adsorbent dose (1-6 mg/100ml) and initial concentration of Vanadium (5-30 ppm) was investigated. Freundlich isotherm (R2=0.97) displayed a better fitting model than Langmuir isotherm. The adsorption kinetics results showed that nanocomposite adsorption process was well-described by pseudo-second-order kinetic model. Thermodynamic parameters of adsorption process such as enthalpy, entropy and Gibbs free energy were also calculated that their values obtained 2.85 Kj/mol, 0.0019 Kj/mol.K and -4.03Kj/mol, respectively. The results of this study showed that Chitosan/ magnesium oxide nanocomposite is a suitable adsorbent for the adsorption of vanadium.