Photocatalytic performance of activated alkali material based on red mud and blast furnace slag
DOI:
https://doi.org/10.46421/entac.v20i1.6192Keywords:
Alkali-activated material, Red mud, Blast furnace slag, Photocatalysis, Water decontaminationAbstract
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.
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