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CONTRIBUTION TO BENEFICIATION OF COAL FLY ASH FOR THE PRODUCTION OF COAGULANTS FOR WATER AND WASTEWATER TREATMENT

1 APUA M. Clotilde
Co-authors:
1 KALENGA M. K. W.
Institution:
1 University of Johannesburg, Faculty of Engineering and the Built Environment, Johannesburg, South Africa, clotildea@uj.ac.za, michelk@uj.ac.za
Conference:
34th International Conference on Metallurgy and Materials, Orea Congress Hotel Brno, Czech Republic, EU, May 21 - 23, 2025
Proceedings:
Proceedings 34th International Conference on Metallurgy and Materials
ISBN:
978-80-88365-27-3
ISSN:
2694-9296
Licence:
CC BY 4.0
Metrics:
18 views / 20 downloads
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Abstract

Wastewater contaminant emissions are currently of global concern because they pose risks to the ecosystem and human health. In the present study, a process of coal fly ash leaching by sulphuric acid was carried out. This process was applied to extract iron, aluminium, magnesium, silicon, and calcium from coal fly ash into a sulphate solution, which can further be used as a coagulant for wastewater treatment. Extraction efficiencies of 57.90% for iron, 33.86% for aluminium, 73.21% for magnesium, 11.12% for silicon, and 25.43% for calcium were achieved under the process conditions discussed in the present study. Wastewater treatment by the obtained sulphates of iron, aluminium, magnesium, silicon and calcium showed good results compared to conventional coagulants.

Keywords: Circular economy, coal fly ash coagulant, metallurgy, waste management, wastewater

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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