Author/Authors :
P. Ashraf Department of Chemical Engineering - Isfahan University of Technology, Isfahan, Iran , N. Etesami Department of Chemical Engineering - Isfahan University of Technology, Isfahan, Iran
كليدواژه :
Adsorption , Magnetic nanoparticles , Heavy metals , Wastewater Treatment
چكيده لاتين :
With increasing population growth and industry progress, water scarcity has become a crisis. Meanwhile, an increase in industrial wastewater, especially heavy metal waste, has led to this crisis. Treatment of wastewater can be a solution for this problem. There are many common solutions to refining and reusing of wastewater. These methods are often not economically viable. Among the major technologies of wastewater treatment adsorption process by new adsorbents such as iron oxide nanoparticles, much attention has been paid. In the present paper, the use of iron oxide nanoparticles (𝐹𝑒3𝑂4) for the removal of copper and lead metal as a discontinuous system has been investigated, simultaneously. According to the results, Fe3O4 nanoparticles is an attractive adsorbent for removing these ions from wastewater. Results showed that saturation of the most sites of nanoparticles occurs after 25 minutes for Pb and 50 minutes for Cu. Increasing in the concentration of lead and copper ions from 19ppm to 25ppm and 14.5ppm to 16.5ppm, respectively, cause to the absorption yields decrease by 10% and 3%. It was also found that with increasing in amount of nanoparticles, the adsorption efficiency of lead ions and copper ions is increased by 28% and 18%, respectively. Also, according to the results, it is clear that in the competition of two ions to absorb on iron oxide nanoparticles, lead ions are stronger than copper ions due to the difference in surface charge and molecular size of heavy metal ions.
