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Article

Use of CdS from Teaching-Laboratory Wastes as a Photocatalyst for the Degradation of Fluoroquinolone Antibiotics in Water

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Grupo de Investigaciones Biomédicas Uniremington, Facultad de Ciencias de la Salud, Corporación Universitaria Remington (Uniremington), Calle 51 No. 51-27, Medellín 050010, Colombia
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Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín 050010, Colombia
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Grupo de Investigación QUIBIO, Facultad de Ciencias Básicas, Universidad Santiago de Cali, Calle 5 No. 62-00, Pampalinda, Santiago de Cali 760035, Colombia
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Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I (UJI), Avda. Sos Baynat, S/N, 12071 Castellón, Spain
*
Authors to whom correspondence should be addressed.
Academic Editors: Sergi Garcia-Segura and José Alberto Herrera-Melián
Water 2021, 13(16), 2154; https://doi.org/10.3390/w13162154
Received: 2 June 2021 / Revised: 18 July 2021 / Accepted: 19 July 2021 / Published: 5 August 2021
Laboratory wastes containing Cd2+ and water polluted by pharmaceuticals represent an environmental concern. In this work, a proof concept, consisting of the use of teaching-laboratory wastes to synthesize CdS and its subsequent use as a photocatalyst to degrade fluoroquinolone antibiotics, was developed. The CdS was prepared by extraction with thioacetamide and calcination (at 450 °C) and characterized using several techniques. The photocatalytic activity of the CdS, to degrade levofloxacin and norfloxacin, was tested, and the routes involved in the process and the primary transformations of the fluoroquinolones were established. Moreover, the ability of CdS-photocatalysis to eliminate levofloxacin in simulated matrices of fresh urine and hospital wastewater was evaluated. The characterization analyses indicated that the CdS semiconductor was synthesized successfully. Effectively, the CdS acted as a photocatalyst toward degradation of levofloxacin, involving the action of superoxide anion radical, holes, and singlet oxygen mainly. The process induced transformations on the methyl-piperazyl moiety, plus hydroxylation of the fluoroquinolone nucleus on levofloxacin. Additionally, CdS-photocatalysis was highly selective for the elimination of the target pollutant in both tested matrices. Our research indicated the good potentiality of recycling teaching-laboratory wastes to generate photocatalysts to degrade organic pollutants. This work was presented at 4° Congreso Colombiano de Procesos Avanzados de Oxidación (4CCPAOx). View Full-Text
Keywords: advanced oxidation process; catalyst synthesis; levofloxacin; norfloxacin; pollutants removal; wastes reuse; water treatment advanced oxidation process; catalyst synthesis; levofloxacin; norfloxacin; pollutants removal; wastes reuse; water treatment
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MDPI and ACS Style

Serna-Galvis, E.A.; Ávila-Torres, Y.; Ibáñez, M.; Hernández, F.; Torres-Palma, R.A. Use of CdS from Teaching-Laboratory Wastes as a Photocatalyst for the Degradation of Fluoroquinolone Antibiotics in Water. Water 2021, 13, 2154. https://doi.org/10.3390/w13162154

AMA Style

Serna-Galvis EA, Ávila-Torres Y, Ibáñez M, Hernández F, Torres-Palma RA. Use of CdS from Teaching-Laboratory Wastes as a Photocatalyst for the Degradation of Fluoroquinolone Antibiotics in Water. Water. 2021; 13(16):2154. https://doi.org/10.3390/w13162154

Chicago/Turabian Style

Serna-Galvis, Efraím A., Yenny Ávila-Torres, María Ibáñez, Félix Hernández, and Ricardo A. Torres-Palma. 2021. "Use of CdS from Teaching-Laboratory Wastes as a Photocatalyst for the Degradation of Fluoroquinolone Antibiotics in Water" Water 13, no. 16: 2154. https://doi.org/10.3390/w13162154

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