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<p>The sugar industry generates a large amount of sugarcane bagasse residues, which are used for power generation, thus seeking energy balance. During this process, fly ash is generated, which in many cases is disposed of in sanitary landfills and/or open-air dumps. Nevertheless, their incorporation into processes in order to contribute to the circular economy is a current challenge. Accordingly, the main objective of this work was to evaluate alternatives for these ashes in two different sectors, as are construction and environmental fields. Thus, two options have been considered in this study, as are (1) replacement of cement with this waste in the manufacture of mortars and (2) use as an adsorbent in the removal of emerging compounds, such as amoxicillin. The ashes were characterized by several methods, such as XRD, XRF, BET, and proximate and ultimate analyses. Replacements of up to 60% cement with fly ash in the manufacture of mortars are suitable, as they lead to compressive strengths below that of a type H mortar. In the adsorption tests, a removal of 99% was attained with activated ashes, whereas a removal of 96% was attained with the non-activated ones. Based on these results, sugar industry can promote circular economy processes thanks to the advantages of this type of material.</p>

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Incorporation of fly ash from sugarcane bagasse for cement replacement and amoxicillin adsorption: a circular economy approach

  • 期刊论文

  • 发表日期：

    2026年1月31日

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  • Juan F. Saldarriaga,
  • Julián E. López,
  • Fabio Freire,
  • Martín Olazar,
  • Roberto Aguado

摘要

The sugar industry generates a large amount of sugarcane bagasse residues, which are used for power generation, thus seeking energy balance. During this process, fly ash is generated, which in many cases is disposed of in sanitary landfills and/or open-air dumps. Nevertheless, their incorporation into processes in order to contribute to the circular economy is a current challenge. Accordingly, the main objective of this work was to evaluate alternatives for these ashes in two different sectors, as are construction and environmental fields. Thus, two options have been considered in this study, as are (1) replacement of cement with this waste in the manufacture of mortars and (2) use as an adsorbent in the removal of emerging compounds, such as amoxicillin. The ashes were characterized by several methods, such as XRD, XRF, BET, and proximate and ultimate analyses. Replacements of up to 60% cement with fly ash in the manufacture of mortars are suitable, as they lead to compressive strengths below that of a type H mortar. In the adsorption tests, a removal of 99% was attained with activated ashes, whereas a removal of 96% was attained with the non-activated ones. Based on these results, sugar industry can promote circular economy processes thanks to the advantages of this type of material.