Oxidation of imidacloprid insecticide through PMS activation using CuFe 2 O 4 nanoparticles: Role of process parameters and surface modifications.

Autor: Núñez-de la Rosa Y; Federal University of São Carlos (UFSCar), Department of Chemistry, 13565-905, São Carlos, SP, Brazil; Fundación Universitaria Los Libertadores, Faculty of Engineering and Basic Sciences, 111221, Bogotá, Colombia., Broterson YB; Federal University of São Carlos (UFSCar), Department of Chemistry, 13565-905, São Carlos, SP, Brazil., Ballesteros-Ballesteros VA; Fundación Universitaria Los Libertadores, Faculty of Engineering and Basic Sciences, 111221, Bogotá, Colombia., Durango LGC; Federal University of São Carlos (UFSCar), Department of Chemistry, 13565-905, São Carlos, SP, Brazil., Toledo JLN; Fundación Universitaria Los Libertadores, Faculty of Engineering and Basic Sciences, 111221, Bogotá, Colombia., Forim MR; Federal University of São Carlos (UFSCar), Department of Chemistry, 13565-905, São Carlos, SP, Brazil., de Souza FL; São Paulo University, Institute of Chemistry of São Carlos, Department of Chemistry and Molecular Physics, Trabalhador São-Carlense Avenue, 400, CEP 13566-590, São Carlos, SP, Brazil., Hammer P; São Paulo State University (UNESP), Institute of Chemistry, Department of Physical Chemistry, 14800-900, Araraquara, SP, Brazil., Aquino JM; Federal University of São Carlos (UFSCar), Department of Chemistry, 13565-905, São Carlos, SP, Brazil. Electronic address: jmaquino@ufscar.br.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Aug; Vol. 362, pp. 142558. Date of Electronic Publication: 2024 Jun 06.
DOI: 10.1016/j.chemosphere.2024.142558
Abstrakt: The contamination of water bodies by synthetic organic compounds coupled with climate change and the growing demand for water supply calls for new approaches to water management and treatment. To tackle the decontamination issue, the activation of peroxymonosulfate (PMS) using copper magnetic ferrite (CuMF) nanoparticles prepared under distinct synthesis conditions was assessed to oxidize imidacloprid (IMD) insecticide. After optimization of some operational variables, such as CuMF load (62.5-250 mg L -1 ), PMS concentration (250-1000 μM), and solution pH (3-10), IMD was completely oxidized in 2 h without interferences from leached metal ions. Such performance was also achieved when using tap water but was inhibited by a simulated municipal wastewater due to scavenging effects promoted by inorganic and organic species. Although there was evidence of the presence of sulfate radicals and singlet oxygen oxidizing species, only four intermediate compounds were detected by liquid chromatography coupled to mass spectrometry analysis, mainly due to hydroxyl addition reactions. Concerning the changes in surface properties of CuMF after use, no morphological or structural changes were observed except a small increase in the charge transfer resistance. Based on the changes of terminal surface groups, PMS activation occurred on Fe sites.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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