Modificação e caracterização do resíduo pó de aciaria elétrica (PAE) para aplicação em reações de redução de cromo (VI)

• Main Authors: Leandro Neves de Paula, Luana Ap. dos Reis Giusto, Rodolfo Cesar Rodrigues Filho, Leandro Rossi Castilho, Fabiano Magalhães, Marcelo Gonçalves Rosmaninho, Diana Quintão Lima
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2013-01-01
• Series: Química Nova
• Subjects: electric arc furnace dust; hexavalent chromium; reduction
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000900009&lng=en&tlng=en
• ISSN: 1678-7064

In this study, electric arc furnace dust (EAFD) was thermally modified at different temperatures under H2 flow or charcoal in order to obtain reduced iron phases (Fe3O4, FeO and Fe0). 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 ºC under H2 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.