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Iron-bearing mining reject as an alternative and effective catalyst for photo-Fenton oxidation of phenol in water

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Abstract

In this work, iron-bearing mining reject was employed as an alternative and potential low-cost catalyst to degrade phenol in water by photo-Fenton strategy. Various techniques, including SEM–EDS, BET, FTIR, and XRD, were applied to evaluate the material's properties. Process parameters such as hydrogen peroxide concentration, catalyst dosage, and pH were studied to determine the optimum reaction conditions ([catalyst] = 0.75 g L−1, [H2O2] = 7.5 mM, and pH = 3). Phenol degradation and mineralization efficiencies at 180 and 300 min were 96.5 and 78%, respectively. These satisfactory results can be associated with the iron amount present in the waste sample. Furthermore, the material showed high catalytic activity and negligible iron leaching even after the fourth reuse cycle. The degradation behavior of phenol in water was well represented by a kinetic model based on the Fermi function. The iron-bearing mining reject can be considered a potential photo-Fenton catalyst for phenol degradation in wastewater.

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The datasets used and analyzed during the current study are available from the corresponding author upon reasonable request.

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Funding

This work was funded by the Brazilian National Council for Scientific and Technological Development/CNPq.

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Conceptualization: [Luana Rabelo Hollanda, Osvaldo Chiavone-Filho]; Methodology: [Joyce Azevedo Bezerra de Souza, Edson Luiz Foletto], Formal analysis and investigation: [Joyce Azevedo Bezerra de Souza, Edson Luiz Foletto2]; Writing—original draft preparation: [Luana Rabelo Hollanda, Edson Luiz Foletto]; Writing—review and editing: [Guilherme Luiz Dotto, Edson Luiz Foletto, Osvaldo Chiavone-Filho]; Funding acquisition: [Osvaldo Chiavone-Filho]; Supervision: [Osvaldo Chiavone-Filho]. All authors read and approved the final manuscript.

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Correspondence to Guilherme Luiz Dotto.

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Guilherme Luiz Dotto is the Editor of the Environmental Science and Pollution Research. The other authors declare that they have no competing interests.

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Responsible Editor: Philippe Garrigues

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Hollanda, L.R., de Souza, J.A.B., Dotto, G.L. et al. Iron-bearing mining reject as an alternative and effective catalyst for photo-Fenton oxidation of phenol in water. Environ Sci Pollut Res 31, 21291–21301 (2024). https://doi.org/10.1007/s11356-024-32513-9

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  • DOI: https://doi.org/10.1007/s11356-024-32513-9

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