Abstract
Landfill leachate is a highly toxic effluent generated in landfills that has various implications for the environment. One crucial strategy for the management of leachate is its collection and treatment. In this context, an interesting alternative that may be applied for leachate treatment is doped TiO2 nanoparticles as a photocatalytic process prior to Saccharomyces cerevisiae bioremediation. This research investigated the efficiency of using 0.1 mol% Ag/Fe co-doped TiO2 nanoparticles in the photocatalytic treatment of leachate. Herein, the nanoparticle conditions were optimized by using the response surface methodology. Three influential factors—photocatalyst concentration, pH, and reaction time were evaluated with respect to the removal efficiency of chemical oxygen demand (COD), PO43−, NH4+, and NO3−. Under the optimal conditions, the reduction rates for COD, PO43−, NH4+, and NO3− were 57, 18.34, 8.76, and 21.08%, respectively. To improve the quality of pre-treated LFL, the photocatalysis was followed by a bioremediation process. As a result, the maximum reduction rates of COD and NH4+–N were 96.41 and 95.45% after 4 days of biological treatment when using an inoculum concentration of 5%. Hence, this process, coupling heterogeneous photocatalysis with a biological process, could be considered a promising synergistic alternative for enhancing the decontamination of landfill leachate.
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30 March 2024
A Correction to this paper has been published: https://doi.org/10.1007/s41207-024-00506-2
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Acknowledgements
This work was supported by the Laboratory of Treatment and Valorization of Water Rejects (LTVRH), the Water Researches and Technologies Center (CERTE). We thank members for their great assistance with experiments and reagents.
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This work was supported by the Tunisian Ministry of Higher Education and Scientific Research under grant [LR15CERTE05].
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Methodology: Y.C, L.E.; formal analysis, investigation, data curation: Y.C., M.M., O.B.; validation, writing, and editing: Y.C., R.E., M.K., R.S.; supervision and funding acquisition: I.T., L.E., A.C.
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Cherni, Y., Messaoud, M., Salem-Berrabah, O.B. et al. A sustainable nanobioremediation approach for Tunisian landfill leachate using Ag/Fe co-doped TiO2 nanoparticles combined with Saccharomyces cerevisiae. Euro-Mediterr J Environ Integr 8, 287–302 (2023). https://doi.org/10.1007/s41207-023-00363-5
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DOI: https://doi.org/10.1007/s41207-023-00363-5