Publication Details
Abstract
This study included first the preparation of nano magnesium oxide, which was prepared by sol gel technique, its most important nano-properties were diagnosed and determined by conducting a set of analyses such as X-ray diffraction, FTIR spectra and surface area. After that, we used nano magnesium oxide particles to remove an organic dye in previously prepared aqueous samples, which is crystal violet (CV) dye. The adsorption method was used to remove the dye, the excellent adsorption capability was evaluated in the presence of a set of influential factors such as dye contact time, pH, initial dye concentration, adsorbent dose for MgO, and temperature on crystal violet day. Different values of pH were taken and the best value to obtain an excellent adsorption capacity was pH = 10-12 and the best primary concentration of dye was 400 mg/l and the ideal temperature was 25 ºC while the appropriate dose of the adsorbent was equal adsorbent dose from(0.005 to 0.040 g) contact. The contact time sufficient for adsorption to occur was 120 minutes. In this study, it was proven that the adsorption process was an exothermic process and also the process was largely spontaneous through thermodynamic analysis and the material used to remove the crystal violet dye was excellently effective in aqueous solutions under suitable conditions. It was also found that the Langmuir isostatic model applies excellently to the adsorption process using nano magnesium oxide and that the quasi-second model is the model that the adsorption kinetics follows. Through this, we find that the internal diffusion of the particles plays an important and fundamental role in the adsorption process and thus removes this organic dye from aqueous solutions with very high efficiency.