PROCESS INTENSIFICATION AT NEAR NEUTRAL pH OF A HOMOGENOUS PHOTO-FENTON REACTION USING FERRICARBOXYLATE COMPLEXES: APPLICATION TO OXYTETRACYCLINE DEGRADATION

PROCESS INTENSIFICATION AT NEAR NEUTRAL pH OF A HOMOGENOUS PHOTO-FENTON REACTION USING FERRICARBOXYLATE COMPLEXES: APPLICATION TO OXYTETRACYCLINE DEGRADATION

PEREIRA, J. H. O. S.; QUEIRÓS, D. B.; REIS, A. C.; NUNES, O. C.; BORGES, M. T.; BOAVENTURA, R. A. R.; VILAR, V. J. P.

Artigo:

This work demonstrates the application at near neutral pH of the photo- Fenton process mediated by ferricarboxylates on the treatment of aqueous solutions containing the antibiotic Oxytetracycline (OTC) under solar irradiation. The formation of a Fe:OTC complex after Fe2+ oxidation to Fe3+, in the presence of H2O2, showed the inconvenience of using the conventional Fe2+/H2O2/UV-Vis process at near neutral pH levels, as the Fe:OTC complex is retained in the filter. To overcome this, a Fe3+/Oxalate process was proposed. Process efficiency was evaluated for variables such as Fe3+ concentration and pH, using a compound parabolic collector (CPC) photoreactor at lab-scale under simulated solar radiation. The effect of the matrix was also tested by spiking OTC into two different real wastewaters.

This work demonstrates the application at near neutral pH of the photo- Fenton process mediated by ferricarboxylates on the treatment of aqueous solutions containing the antibiotic Oxytetracycline (OTC) under solar irradiation. The formation of a Fe:OTC complex after Fe2+ oxidation to Fe3+, in the presence of H2O2, showed the inconvenience of using the conventional Fe2+/H2O2/UV-Vis process at near neutral pH levels, as the Fe:OTC complex is retained in the filter. To overcome this, a Fe3+/Oxalate process was proposed. Process efficiency was evaluated for variables such as Fe3+ concentration and pH, using a compound parabolic collector (CPC) photoreactor at lab-scale under simulated solar radiation. The effect of the matrix was also tested by spiking OTC into two different real wastewaters.

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DOI: 10.5151/chemeng-cobeq2014-1984-16544-146795

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Como citar:

PEREIRA, J. H. O. S.; QUEIRÓS, D. B.; REIS, A. C.; NUNES, O. C.; BORGES, M. T.; BOAVENTURA, R. A. R.; VILAR, V. J. P.; "PROCESS INTENSIFICATION AT NEAR NEUTRAL pH OF A HOMOGENOUS PHOTO-FENTON REACTION USING FERRICARBOXYLATE COMPLEXES: APPLICATION TO OXYTETRACYCLINE DEGRADATION", p-9543-9550. In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 23591757, DOI 10.5151/chemeng-cobeq2014-1984-16544-146795