Modification and characterization of residue electric arc furnace dust (EAFD) for application in chromium (VI) reduction reactions

摘要

In this study, electric arc furnace dust (EAFD) was thermally modified at different temperatures under H_2 flow or charcoal in order to obtain reduced iron phases (Fe_3O_4, FeO and Fe~0). The formation of these phases was confirmed by powder X-ray diffraction. The tests performed for reducing Cr (VI) using resultant materials obtained after thermal treatment of the EAFD showed excellent results, with PAE600H (EAFD reduced at 600 °C under H_2 flow) decreasing around 100% of the Cr (VI) in only 10 minutes of reaction. These results indicate the possibility of adding value to the residue, obtaining materials that offer great potential for environmental applications.