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Article

Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties

Grupo de Procesos de Oxidación Avanzada, Departamento de Ingeniería Textil y Papelera, Campus de Alcoy, Universitat Politècnica de València, 03801 Alcoy, Spain
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Authors to whom correspondence should be addressed.
Present address: Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR—Marine Research Institute, CEIMAR—International Campus of Excellence of the Sea, University of Cadiz, Campus Universitario de Puerto Real, 11510 Cádiz, Spain.
Academic Editor: Detlef W. Bahnemann
Catalysts 2021, 11(3), 372; https://doi.org/10.3390/catal11030372
Received: 12 February 2021 / Revised: 4 March 2021 / Accepted: 8 March 2021 / Published: 12 March 2021
(This article belongs to the Special Issue Trends in Environmental Applications of Advanced Oxidation Processes)
Photo-induced Advanced Oxidation Processes (AOPs) using H2O2 or S2O82− as radical precursors were assessed for the abatement of six different contaminants of emerging concern (CECs). In order to increase the efficiency of these AOPs at a wider pH range, the catechol organic functional compound was studied as a potential assistant in photo-driven iron-based processes. Different salinity regimes were also studied (in terms of Cl concentration), namely low salt water (1 g·L−1) or a salt–water (30 g·L−1) matrix. Results obtained revealed that the presence of catechol could efficiently assist the photo-Fenton system and partly promote the photo-induced S2O82− system, which was highly dependent on salinity. Regarding the behavior of individual CECs, the photo-Fenton reaction was able to enhance the degradation of all six CECs, meanwhile the S2O82−-based process showed a moderate enhancement for acetaminophen, amoxicillin or clofibric acid. Finally, a response-surface methodology was employed to determine the effect of pH and catechol concentration on the different photo-driven processes. Catechol was removed during the degradation process. According to the results obtained, the presence of catechol in organic macromolecules can bring some advantages in water treatment for either freshwater (wastewater) or seawater (maritime or aquaculture industry). View Full-Text
Keywords: phenolic moieties; photo-Fenton; persulfate; emerging contaminants; Fe-binding ligands; iron chelates phenolic moieties; photo-Fenton; persulfate; emerging contaminants; Fe-binding ligands; iron chelates
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MDPI and ACS Style

Moreno-Andrés, J.; Vallés, I.; García-Negueroles, P.; Santos-Juanes, L.; Arques, A. Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties. Catalysts 2021, 11, 372. https://doi.org/10.3390/catal11030372

AMA Style

Moreno-Andrés J, Vallés I, García-Negueroles P, Santos-Juanes L, Arques A. Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties. Catalysts. 2021; 11(3):372. https://doi.org/10.3390/catal11030372

Chicago/Turabian Style

Moreno-Andrés, Javier, Iván Vallés, Paula García-Negueroles, Lucas Santos-Juanes, and Antonio Arques. 2021. "Enhancement of Iron-Based Photo-Driven Processes by the Presence of Catechol Moieties" Catalysts 11, no. 3: 372. https://doi.org/10.3390/catal11030372

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