Photocatalytic performance of activated alkali material based on red mud and blast furnace slag

Authors

  • Sara Nuza Oliveira dos Reis Gonçalves Centro Federal de Educação Tecnológica de Minas Gerais
  • Maysa Lorena Figueiredo Martins Universidade Federal de Ouro Preto
  • Paulo Roberto Ribeiro Soares Junior Centro Federal de Educação Tecnológica de Minas Gerais
  • Domingos Sávio de Resende Centro Federal de Educação Tecnológica de Minas Gerais
  • Augusto Cesar da Silva Bezerra Centro Federal de Educação Tecnológica de Minas Gerais

DOI:

https://doi.org/10.46421/entac.v20i1.6192

Keywords:

Alkali-activated material, Red mud, Blast furnace slag, Photocatalysis, Water decontamination

Abstract

One of the concerns in the mining industry is the large amount of waste generated. In addition to environmental impacts, this waste takes up large areas for final disposal. Furthermore, wastewater treatment becomes increasingly challenging, given the diversity of contaminants. This study investigated the performance of alkali-activated materials (AAMs) applied to water decontamination, with precursors based on red mud and blast furnace slag. AAM was developed aiming at optimizing precursor-activator ratios. The characterization of the raw materials indicated particle size composed of fine particles, high concentration of network-forming elements and presence of photoactive goethite. The results reported strength up to 27 MPa, which indicated a cohesive alkali-activated matrix. The removal of organic compounds reached 96.5% and was confirmed by the discoloration of the dye solution. Additionally, the photocatalysis process may be the main mechanism for decontamination. These findings can promote the development of new low-cost, sustainable materials for environmental applications.

Author Biographies

Sara Nuza Oliveira dos Reis Gonçalves, Centro Federal de Educação Tecnológica de Minas Gerais

Mestre em Engenharia de Minas

Maysa Lorena Figueiredo Martins, Universidade Federal de Ouro Preto

Doutoranda em Engenharia de Materiais

Paulo Roberto Ribeiro Soares Junior, Centro Federal de Educação Tecnológica de Minas Gerais

Doutorando em Engenharia Civil

Domingos Sávio de Resende, Centro Federal de Educação Tecnológica de Minas Gerais

Professor

Augusto Cesar da Silva Bezerra, Centro Federal de Educação Tecnológica de Minas Gerais

Professor

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Published

2024-10-07

How to Cite

REIS GONÇALVES, Sara Nuza Oliveira dos; FIGUEIREDO MARTINS, Maysa Lorena; RIBEIRO SOARES JUNIOR, Paulo Roberto; RESENDE, Domingos Sávio de; BEZERRA, Augusto Cesar da Silva. Photocatalytic performance of activated alkali material based on red mud and blast furnace slag. In: NATIONAL MEETING OF BUILT ENVIRONMENT TECHNOLOGY, 20., 2024. Anais [...]. Porto Alegre: ANTAC, 2024. p. 1–13. DOI: 10.46421/entac.v20i1.6192. Disponível em: https://eventos.antac.org.br/index.php/entac/article/view/6192. Acesso em: 21 nov. 2024.

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