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A novel high rotation bubble reactor for the treatment of a model pollutant in ozone/goethite/H2O2 and UV/goethite coupled processes

  • Advanced Oxidation/Reduction Technologies: An Perspective from Iberoamerican Countries
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Abstract

This work proposes a novel approach for the coupling of ozonation and Fenton processes using a new prototype of a high rotation bubble reactor (HRBR), which improves utilization of the ozone and hydrogen peroxide through bubble generation and axial and radial dispersion of the flow. The HRBR integrates the rotor and the diffuser in the same device facilitating the generation and dispersion of the ozone bubbles inside the reaction tank. Thus, the mass transfer to the liquid phase is enhanced. Most of the experiments were carried out under neutral pH and 1580 rpm of agitation during the 20 min of reaction. Total ibuprofen degradation was achieved within 20 min of operation for most of the couplings and individual processes evaluated. It was successfully demonstrated that the HRBR can be used as a reactive system for heterogeneous Fenton and ozonation coupling because it presents a high synergy. For the ozonation process, the reactor also displayed a good performance because the residual ozone in the gas is lower than 0.4 mg/L, which indicates that there is a suitable ozone utilization. Ibuprofen degradation by other processes like oxidation direct by H2O2 and heterogeneous Fenton was 28.0% and 73.1%, respectively. It was determined that the reaction rate, synergy, OUI (ozone utilized index), and consumption of electrical energy (EE/O) of the coupled processes could be improved by using the HRBR depending on the experimental conditions.

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All data generated or analyzed during this study are included in this published article and its supplementary information files.

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Acknowledgments

The authors thank the Administrative Department of Science, Technology, and Innovation of Colombia (Colciencias) for funding the national doctoral program (727 and 647), Universidad del Valle – Minciencias (Grant FP44842-128-2017), and the SENA (Grant No. 445-5455). The authors are very grateful for the help in designing and constructing the prototype given by Dr. Augusto Arce.

Funding

National doctoral program (727 and 647) Minciencias Colombia, Universidad del Valle – Minciencias Colombia (Grant FP44842-128-2017) and the SENA (Grant No. 445-5455).

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Contributions

Conceptualization: Jose Antonio Lara-Ramos and Fiderman Machuca-Martinez. Formal analysis: Jose Antonio Lara-Ramos and Fiderman Machuca-Martinez. Funding acquisition: Fiderman Machuca-Martinez and Jose Antonio Lara-Ramos. Investigation: Jose Antonio Lara-Ramos, Angela María Constain-Escobar, and Karen Vanessa Rojas-Ortiz. Methodology: Jose Antonio Lara-Ramos. Project administration: Jennyfer Diaz-Angulo and Fiderman Machuca-Martinez. Supervision: Fiderman Machuca-Martínez. Validation: Jose Antonio Lara-Ramos. Writing—original draft: Jose Antonio Lara-Ramos. Writing—review and editing: Jose Antonio Lara-Ramos, Jennyfer Diaz-Angulo, and Fiderman Machuca-Martínez.

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Correspondence to Fiderman Machuca-Martínez.

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The authors declare that they have no competing interests.

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Responsible Editor: Vítor Pais Vilar

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Highlights

• High rotation bubble reactor (HRBR) for heterogeneous Fenton at neutral pH and ozonation processes.

• Radial and axial H2O2 and ozone distribution by the rotor and diffuser assembly.

• A low OUI indicates efficient use of applied ozone in the new HRBR.

• Evaluation and comparison of different AOPs by using the new HRBR for ibuprofen degradation.

• The ozonation and Fenton coupling exhibited the best performance in the ibuprofen degradation.

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Lara-Ramos, J.A., Constain-Escobar, A.M., Rojas-Ortiz, K.V. et al. A novel high rotation bubble reactor for the treatment of a model pollutant in ozone/goethite/H2O2 and UV/goethite coupled processes. Environ Sci Pollut Res 28, 24079–24091 (2021). https://doi.org/10.1007/s11356-020-12299-2

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  • DOI: https://doi.org/10.1007/s11356-020-12299-2

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