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Efficiency assessment of constructed wetlands for fuel contaminated water treatment

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Abstract

Constructed wetlands are novel systems distinguished by their economy, easy maintenance and operation, also characterized by their complex mechanism to remove a wide range of pollutants. Four artificial wetlands, two planted with Typha latofolia and two unplanted, were filled with wastewater obtained from the mixture of residual fuel from the service stations maintenance storage systems and clean water, at a 3% vfuel/vclean water ratio, a planted wetland and an unplanted one were biostimulated with fertilizer at a 100:10:1 ratio, and all wetlands were studied for 72 days, analyzing total petroleum hydrocarbons in the organic range of gasoline and diesel, pH, oxide reduction potential, phosphate and nitrate. The obtained results showed that facultative conditions prevailed in the wetlands when reporting data on the reduction oxide potential −100 to 300 mV, favoring the denitrification process and removal of total petroleum hydrocarbons with an efficiency greater than 84%. In conclusion, the phytotoxic effect was evidenced in the planted wetlands when the macrophages showed deterioration on the last sampling day; on the other hand, all wetlands showed good performance for total hydrocarbons removal, being the biostimulated and planted with Typha latifolia wetland the one that obtained the highest removal percentage, showing the potential of these systems for hydrocarbon-contaminated wastewater treatment.

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Acknowledgements

The authors acknowledge to the Research and Extension Department, to the Biotechnology Group. Department of Chemistry and Department of Biology (GRUBIODEQ) and the Biotechnology Program of University of Córdoba for supporting this research project.

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Contributions

GC-D performed the experimental design, sampling campaign and prepared the manuscript text. LO-Z helped in the compiled the data and results analysis. FT-B helped in the literature review and manuscript preparation.

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Correspondence to G. Campo-Daza.

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The authors declare that they have no conflict of interest.

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Editorial responsibility: Samareh Mirkia.

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Campo-Daza, G., Oviedo-Zumaqué, L.E. & Torres-Bejarano, F. Efficiency assessment of constructed wetlands for fuel contaminated water treatment. Int. J. Environ. Sci. Technol. 19, 10973–10984 (2022). https://doi.org/10.1007/s13762-021-03901-2

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  • DOI: https://doi.org/10.1007/s13762-021-03901-2

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