Magnetic catalysts based on electric arc furnace dust used to remove pollutants

  • Clara V. Diniz
  • Mariana E. da Fonseca
  • Ildefonso Binatti
  • José D. Ardisson
  • Eudes Lorençon
  • Raquel Vieira Mambrini
Article
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Abstract

New materials based on electric arc furnace (EAF) dust have been produced via temperature-programmed reduction using hydrogen gas at different temperatures. Scanning electron microscopy, thermal analysis, X-ray diffraction, and Mössbauer spectroscopy suggested that the EAF dust is reduced by hydrogen at 600 and 700 °C producing reduced iron, e.g., iron (II) and iron metallic, magnetics and more active catalytic phases. The new materials show magnetic behavior as well as EAF starting material. Electron paramagnetic resonance studies using N-t-butyl-α-phenylnitrone as a trapped radical agent were performed showing characteristic signals related to paramagnetic species produced exclusively by the interaction of catalysts with hydrogen peroxide (H2O2). The new magnetic materials were successfully used for pollutant removal by adsorption followed by oxidation of model dyes such as methylene blue and indigo carmine. In addition, the great advantage of these materials is that they may be easily recovered magnetically and reused.

Keywords

Electric arc furnace dust Oxidation Pollutant removal Magnetic materials 

Notes

Acknowledgements

This work was developed with the support of Rede Mineira de Química, FAPEMIG, and CNPq.

Compliance with ethical standards

Conflict of interest

The authors declared that there are no known conflicts of interest associated with this publication and there has been no significant financial support for this work that could have influenced its outcome.

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Clara V. Diniz
    • 1
  • Mariana E. da Fonseca
    • 1
  • Ildefonso Binatti
    • 1
  • José D. Ardisson
    • 2
  • Eudes Lorençon
    • 1
  • Raquel Vieira Mambrini
    • 1
  1. 1.Centro Federal de Educação Tecnológica de Minas GeraisBelo HorizonteBrazil
  2. 2.Laboratório de Física AplicadaCentro de Desenvolvimento da Tecnologia Nuclear – CDTNBelo HorizonteBrazil

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