Kinetic Studies Of The Reaction Between Pesticides And Hydroxyl Radical Generated By Laser Flash Photolysis

dc.creatorGozzi
dc.creatorFabio; Oliveira
dc.creatorSilvio C.; Dantas
dc.creatorRenato F.; Silva
dc.creatorVolnir O.; Quina
dc.creatorFrank H.; Machulek
dc.creatorAmilcar
dc.creatorJr.
dc.date2016
dc.datemar
dc.date2017-11-13T11:33:00Z
dc.date2017-11-13T11:33:00Z
dc.date.accessioned2018-03-29T05:47:32Z
dc.date.available2018-03-29T05:47:32Z
dc.identifierJournal Of The Science Of Food And Agriculture. Wiley-blackwell, v. 96, p. 1580 - 1584, 2016.
dc.identifier0022-5142
dc.identifier1097-0010
dc.identifierWOS:000372316700021
dc.identifier10.1002/jsfa.7258
dc.identifierhttp://onlinelibrary-wiley-com.ez88.periodicos.capes.gov.br/doi/10.1002/jsfa.7258/full
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/326184
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1363190
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionDue to contamination of the environment by pesticides and their mishandling, there is the need for treatment of contaminated sites and correct disposal of materials containing them. Thus, studies with advanced oxidation processes are expanding and can determine the rate constant of the hydroxyl radical with organic compounds of great importance in environmental contamination. In this context, the use of laser flash photolysis has been shown to be viable for the determination of these constants. RESULTS: The reaction rate constants of different pesticides with HO center dot in degassed acetonitrile have been determined. They were 1.6 x 10(9) M-1 s(-1), 0.6 x 10(9) M-1 s(-1), 1.2 x 10(9) M-1 s(-1), 2.4 x 10(9) M-1 s(-1) and 2.2 x 10(9) M-1 s(-1) for the pesticides carbaryl, propoxur, fenoxycarb, ethoxysulfuron and chlorimuron-ethyl, respectively. These values are about an order of magnitude smaller than the diffusion controlled rate and correlate with the relative rates of disappearance of the pesticides in the photo-Fenton reaction in water. CONCLUSION: The correlation of the relative rate constants determined by laser flash photolysis with the relative rates of photo-Fenton degradation of the pesticides is compelling evidence for the participation of the hydroxyl radical in the degradation of these pesticides in the latter system. (C) 2015 Society of Chemical Industry
dc.description96
dc.description5
dc.description1580
dc.description1584
dc.descriptionCNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
dc.descriptionCAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior)
dc.descriptionFUNDECT (Fundacao de Apoio ao Desenvolvimento do Ensino, Ciencia e Tecnologia do Estado de Mato Grosso do Sul)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageEnglish
dc.publisherWiley-Blackwell
dc.publisherHoboken
dc.relationJournal of the Science of Food and Agriculture
dc.rightsfechado
dc.sourceWOS
dc.subjectAdvanced Oxidation Processes
dc.subjectHydroxyl Radical
dc.subjectLaser Flash Photolysis
dc.subjectPesticides
dc.subjectKinetics
dc.subjectPhoto-fenton
dc.titleKinetic Studies Of The Reaction Between Pesticides And Hydroxyl Radical Generated By Laser Flash Photolysis
dc.typeArtículos de revistas


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