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

2013; Brazilian Chemical Society; Volume: 36; Issue: 9 Linguagem: Inglês

10.1590/s0100-40422013000900009

ISSN

1678-7064

Autores

Leandro Neves de Paula, Luana Aparecida dos Reis Giusto, Rodolfo Cesar Rodrigues Filho, Leandro Rossi Castilho, Fabiano Magalhães, Marcelo G. Rosmaninho, Diana Q. Lima,

Tópico(s)

Bauxite Residue and Utilization

Resumo

IN CHROMIUM (VI) REDUCTION REACTIONS.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 3 O 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 ºC 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.

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