Mining Waste as an Eco-Friendly Adsorbent in the Removal of Industrial Basazol Yellow 5G Dye and Incorporation in Mortars

The circular economy seeks to better use materials and minimize waste generation. This article evaluated the use of granite rock powder, a mining residue, as an adsorbent for the Basazol Yellow 5G (BY5G) dye and the reuse of the residue generated by the by treating this effluent in construction prod...

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Bibliographic Details
Published in:Processes 2023-12, Vol.11 (12), p.3349
Main Authors: Hawerroth, Mariane, Pereira, Eduardo, de Almeida, Lariana Negrão Beraldo, Martins, Ramiro José Espinheira, Pietrobelli, Juliana Martins Teixeira de Abreu
Format: Article
Language:English
Subjects:
Activation energy
Adsorbents
Adsorption
Cement
Chemical elements
Circular economy
Diffraction
Dyes
Efficiency
Effluents
Endothermic reactions
Enthalpy
Fourier transforms
Isotherms
Mine wastes
Mineral industry
Mines and mineral resources
Mining industry
Mortars (material)
Residues
Water treatment
X-ray diffraction
X-rays
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Summary:The circular economy seeks to better use materials and minimize waste generation. This article evaluated the use of granite rock powder, a mining residue, as an adsorbent for the Basazol Yellow 5G (BY5G) dye and the reuse of the residue generated by the by treating this effluent in construction products. Characterization of the adsorbent material by N2 physisorption indicated a surface area of 1514 m2 g−1. Energy-dispersive spectrometry (EDS) and X-ray diffraction (XRD) confirmed the presence of silica in the sample and the absence of amorphous halos. The kinetic study showed a removal of approximately 98% at 298 K, and the pseudo-second-order model obtained the best fit. The adsorption isotherm satisfied the Langmuir model and was consistent with the L-type isotherm. The negative value of the Gibbs energy (ΔG°) and the positive value of the enthalpy (ΔH°) indicate that the process is spontaneous and endothermic. The activation energy (Ea) indicates the occurrence of chemical adsorption. The desorption rate was low for the adsorbate, demonstrating the possibility of using residual adsorbent material as a filler in mortar and concrete. The material did not exhibit pozzolanic characteristics and, even after adsorption, it showed favorable results when replacing 10% of the cement with GRP viable for use in civil construction even after the adsorption process.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr11123349