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

Quimica nova

Castilho, Leandro Rossi¹  Magalhães, Fabiano¹  Giusto, Luana Ap. dos Reis¹  Paula, Leandro Neves de¹  Rodrigues Filho, Rodolfo Cesar¹  Lima, Diana Quintão²  Rosmaninho, Marcelo Gonçalves² 

[1] Universidade Federal de Alfenas, Alfenas, Brasil;Universidade Federal de Minas Gerais, Belo Horizonte, Brasil

关键词: electric arc furnace dust;    hexavalent chromium;    reduction.;   

DOI  :  10.1590/S0100-40422013000900009

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

CC BY