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Open AccessArticle

Carbamazepine Degradation Mediated by Light in the Presence of Humic Substances-Coated Magnetite Nanoparticles

1
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, CONICET. Casilla de Correo 16, Sucursal 4, La Plata 1900, Argentina
2
Unidad Académica Río Gallegos, Universidad Nacional de la Patagonia Austral, Río Gallegos 9400, Argentina
3
Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Balcarce, Route 226 Km 73,5, Balcarce 7620, Argentina
4
Dipartimento di Chimica and NIS Inter-departmental Centre, Università di Torino, Via Giuria 7, 10125 Torino, Italy
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Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas (PROBIEN), Neuquén 8300, Argentina
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(10), 1379; https://doi.org/10.3390/nano9101379
Received: 25 July 2019 / Revised: 19 August 2019 / Accepted: 2 September 2019 / Published: 26 September 2019
(This article belongs to the Special Issue Sustainable and Safe Nano-Enabled Water Treatment Applications)
The use of iron-based nanomaterials for environmental remediation processes has recently received considerable attention. Here, we employed core-shell magnetite-humic acids nanoparticles as a heterogeneous photosensitizer and iron source in photo-Fenton reaction for the degradation of the psychiatric drug carbamazepine (CBZ). CBZ showed low photodegradation rates in the presence of the magnetic nanoparticles, whereas the addition of hydrogen peroxide at pH = 3 to the system drastically increased the abatement of the contaminant. The measured Fe2+ and Fe3+ profiles point to the generation of Fe3+ at the surface of the nanoparticles, indicating a heterogeneous oxidation of the contaminant mediated by hydroxyl radicals. Products with a higher transformation degree were observed in the photo-Fenton procedure and support the attack of the HO radical on the CBZ molecule. Promising results encourage the use of the nanoparticles as efficient iron sources with enhanced magnet-sensitive properties, suitable for applications in photo-Fenton treatments for the purification of wastewater. View Full-Text
Keywords: magnetite nanoparticles; humic acids; carbamazepine; photo-Fenton; contaminants of emerging concern magnetite nanoparticles; humic acids; carbamazepine; photo-Fenton; contaminants of emerging concern
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MDPI and ACS Style

Aparicio, F.; Escalada, J.P.; De Gerónimo, E.; Aparicio, V.C.; García Einschlag, F.S.; Magnacca, G.; Carlos, L.; Mártire, D.O. Carbamazepine Degradation Mediated by Light in the Presence of Humic Substances-Coated Magnetite Nanoparticles. Nanomaterials 2019, 9, 1379.

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