Monitoring Photo-Fenton and Photo-Electro-Fenton process of contaminants emerging concern by a gas diffusion electrode using Ca 10-x Fe x-y W y (PO 4 ) 6 (OH) 2 nanoparticles as heterogeneous catalyst.

Autor: Júnior FEB; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil; Faculty of Exact Sciences and Technology - FACET, Federal University of Grande Dourados - UFGD, Rodovia Dourados-Itahum, Km 12, Dourados,MS, 79804-970, Brazil., Marin BT; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil., Mira L; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil., Fernandes CHM; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil., Fortunato GV; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil., Almeida MO; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil., Honório KM; School of Arts, Sciences and Humanities, University of São Paulo - EACH-USP, Rua Arlindo Béttio 1000, São Paulo, SP, 03828-000, Brazil., Colombo R; School of Arts, Sciences and Humanities, University of São Paulo - EACH-USP, Rua Arlindo Béttio 1000, São Paulo, SP, 03828-000, Brazil., de Siervo A; Campinas Institute of Physics, State University of Campinas - UNICAMP, Sérgio Buarque de Holanda 777, Campinas, SP, 13083-859, Brazil., Lanza MRV; São Carlos Instiute of Chemistry, University of São Paulo - USP, Avenida Trabalhador São Carlense 400, São Carlos, SP, 13566-590, Brazil. Electronic address: marcoslanza@usp.br., Barros WRP; Faculty of Exact Sciences and Technology - FACET, Federal University of Grande Dourados - UFGD, Rodovia Dourados-Itahum, Km 12, Dourados,MS, 79804-970, Brazil. Electronic address: willyambarros@ufgd.edu.br.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Aug; Vol. 361, pp. 142515. Date of Electronic Publication: 2024 Jun 01.
DOI: 10.1016/j.chemosphere.2024.142515
Abstrakt: The catalytic performance of modified hydroxyapatite nanoparticles, Ca 10-x Fe x-y W y (PO 4 ) 6 (OH) 2 , was applied for the degradation of methylene blue (MB), fast green FCF (FG) and norfloxacin (NOR). XPS analysis pointed to the successful partial replacement of Ca by Fe. Under photo-electro-Fenton process, the catalyst Ca 4 Fe II 1·92 W 0·08 Fe III 4 (PO 4 ) 6 (OH) 2 was combined with UVC radiation and electrogenerated H 2 O 2 in a Printex L6 carbon-based gas diffusion electrode. The application of only 10 mA cm -2 resulted in 100% discoloration of MB and FG dyes in 50 min of treatment at pH 2.5, 7.0 and 9.0. The proposed treatment mechanism yielded maximum TOC removal of ∼80% and high mineralization current efficiency of ∼64%. Complete degradation of NOR was obtained in 40 min, and high mineralization of ∼86% was recorded after 240 min of treatment. Responses obtained from LC-ESI-MS/MS are in line with the theoretical Fukui indices and the ECOSAR data. The study enabled us to predict the main degradation route and the acute and chronic toxicity of the by-products formed during the contaminants degradation.
Competing Interests: Declaration of competing interest The authors have participated in all step of manuscript, since design, analysis up to interpretation of the data. Have no conflict of interest. In addition, this manuscript has not been submitted to, nor is under review at, another journal or other publishing similar.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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