Desulfurization of coal pyrite tailings with ozone

Autores

DOI:

https://doi.org/10.24221/jeap.9.3.2024.6078.188-195

Palavras-chave:

Oxidation, sulfates, ozonation

Resumo

Mining is an important sector of the economy, and in the southern region of Brazil, coal mining stands out. This activity generates waste with a high pyritic content, which causes environmental problems such as acid mine drainage (AMD). Therefore, studies that aim to beneficiate or treat this waste are highly relevant. In this study, an alternative for desulfurizing pyritic waste using ozone was investigated. Ozone treatment of mining tailings suspension was evaluated as a new strategy for sulfur removal. Particle size analysis, sulfate content, ferrous ion concentration (and total iron), pH, Eh, conductivity, and X-ray fluorescence were performed. Furthermore, a kinetic analysis of ozone consumption was established. The behavior of sulfate and hydrogen ion concentrations indicates that sulfuric acid is the main reaction product, and conductivity suggests that ion release is continuous over the ozonation time. Reaction kinetics with ??1.2 was found for ozone depletion, which aids in predicting the dosage to be applied on a larger scale. This study contributes to the search for alternatives for treating pyritic waste and contributes to the understanding of the reaction rate of ozone consumption in this type of reaction.

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Referências

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Publicado

2024-08-12

Como Citar

Angioletto, E., Gomes, T., Magnus, E. S., Noni Júnior, A. de, & Angioletto, E. (2024). Desulfurization of coal pyrite tailings with ozone. Journal of Environmental Analysis and Progress, 9(3), 188–195. https://doi.org/10.24221/jeap.9.3.2024.6078.188-195

Edição

v. 9 n. 3 (2024): Journal of Environmental Analysis and Progress

Seção

Articles - Artigos

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Copyright (c) 2024 Elcio Angioletto, Thauan Gomes, Eduardo Scheffer Magnus, Agenor de Noni Júnior, Elidio Angioletto

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