Speaker
Description
In this study, iron oxide super paramagnetic nanoparticles, Fe3O4@MnF2O4 and Fe3O4@SiO2 core/shell Nano composites synthesized via ultrasonic assisted chemical co-precipitating technique to remove heavy metals from wastewater, especially nuclear wastewater. Optimization method under controlled conditions was used to increase the adsorption of heavy metals by nanoparticles as adsorbent. Thus, the adsorption percentage of lead, nickel, chromium and mercury metals were determined 95.4%, 90%, 75% and 70.26% via Fe3O4 super paramagnetic nanoparticles, respectively, by atomic absorption spectroscopy. Finally, the absorbance of this Nano composite for 4 solutions of lead, nickel, and chromium and mercury metals was 90.87%, 90.56%, 71.36% and 73%, respectively. At the end, the core/shell Nano composite of the iron oxide/silica was also fabricated by reflux-assited chemical co-precipitation method and the absorption percentage of this Nano composite for 4 pollution solution of lead, nickel, chromium and mercury contaminants were calculated 94.25%, 87%, 79.57% and 76.14%, respectively. At the end step, the zirconium wastewater was prepared and the iron oxide nanoparticles and their Nano composites were tested according to the optimum conditions. The adsorption percentage of the zirconium ion source pollution was reported about 75.33% and 77.08%, respectively, indicating that the nanoparticles would have better adsorption conditions without applying the temperature. Also, the amount of adsorption of the zirconium wastewater by Nano composites was investigated with silica and manganese ferrite coated around Fe3O4 super paramagnetic nanoparticles and the main amounts of zirconium after the application of the above Nano composites were reported at 623.88 ppm and 838.1 ppm, respectively The absorption efficiency was 64.69 % and 58.28 % which shows that the it is decreased due to the increase in the size of the Nano sized composites compared to the nanoparticles
| Speaker's title | Mr |
|---|---|
| Affiliation | Dr asghar sedighzadeh |
