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Peculiarities of the iron amorphous state stabilization during the reduction of Fe2O3 with waste activated sludge (WAS)

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Abstract

The formation of amorphous iron during the reduction of α-Fe2O3 by waste activated sludge (WAS) thermal destruction products was studied by XRD, SEM, and EDS methods. Since WAS contains sand and clay along with bio-component, thermal treatment at 1000 °C under conditions of oxygen deficiency is accompanied by the formation of amorphous carbon, SiO2, and Al2O3 and their reduction products. At the same time, hematite is reduced to amorphous iron with a lamellar structure. Precipitation of Si, Al, and C-elements on lamellas and the presence of inclusions of residues SiO2, Al2O3, and C between packs of differently directed lamellas prevents the transition of amorphous iron to a crystalline state even when the samples are slowly cooled in a standard synthesis furnace.

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Authors and Affiliations

  1. Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico

    Jorge Luis Hernández Morelos, Marina Vlasova, Pedro Antonio Márquez Aguilar & Abigail Parra Parra

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  1. Jorge Luis Hernández Morelos
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  2. Marina Vlasova
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  3. Pedro Antonio Márquez Aguilar
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  4. Abigail Parra Parra
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Correspondence to Marina Vlasova.

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Hernández Morelos, J.L., Vlasova, M., Márquez Aguilar, P.A. et al. Peculiarities of the iron amorphous state stabilization during the reduction of Fe2O3 with waste activated sludge (WAS). MRS Advances 7, 1011–1016 (2022). https://doi.org/10.1557/s43580-022-00362-8

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