Ametryne degradation by ionizing radiation

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dc.contributor.authorANDRADE, DEBORA C. dept_BR
dc.contributor.authorMELO, RITA P.pt_BR
dc.contributor.authorMORI, MANOEL N.pt_BR
dc.contributor.authorDUARTE, CELINA L.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 8th/ MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 15thpt_BR
dc.date.accessioned2014-11-17T18:41:43Zpt_BR
dc.date.accessioned2014-11-18T18:21:48Zpt_BR
dc.date.accessioned2015-04-01T21:25:55Z
dc.date.available2014-11-17T18:41:43Zpt_BR
dc.date.available2014-11-18T18:21:48Zpt_BR
dc.date.available2015-04-01T21:25:55Z
dc.date.eventoSept. 30 - Oct. 5, 2007pt_BR
dc.description.abstractAmetryne may be released to the environment during its manufacture, transport, storage, formulation and use as selective herbicide for the control of annual broadleaf and grass weeds. It is applied as an aqueous suspension for preemergence or post-directed applications on crops. Depending on the pesticide formulation and type of application, ametryne residues may be detectable in water, soil and on the surfaces for months or years. The herbicide used to this study was Ametryne (commercial name, Gesapax 500), commonly used on field crops and on corn and commercialized since 1975. Ametryne was analyzed by gas chromatography (GC Shimadzu 17A), after extraction with hexane/dichloromethane (1:1 v/v) solution. The calibration curve was obtained with a regression coefficient of 0.9871. In addition, the relative standard deviation was lower than 10%. The radiation-processing yield was evaluated by the destruction G-value (Gd) (Eq. 1), that is defined by the number of destroyed molecules by absorption of 100 eV of energy from ionizing radiation. Different concentrations of the herbicide (11.4 mol L -1 ; 22.7 mol L -1 ; 34.1 mol L -1 and 45.5 mol L -1 ) were irradiated at the AECL “Gammacell 220” 60Co source, with 1 kGy, 3 kGy, 6 kGy, 9 kGy, 12kGy, 15 kGy and 30 kGy absorbed doses. After irradiation processing, the ametryne highest reduction rate occurs at low doses of radiation: at 6 kGy more than 85-90% of all ametryne compounds were removed. Two products of incomplete degradation of ametryne were identified as s-triazyne isomers. However, further work is needed in order to fully understand the ametryne degradation mechanisms the degradation yield of ametryne depends on its initial concentration and the process seems to be more efficient at higher concentrations.
dc.event.siglaINAC; ENAN; ENFIRpt_BR
dc.identifier.citationANDRADE, DEBORA C. de; MELO, RITA P.; MORI, MANOEL N.; DUARTE, CELINA L. Ametryne degradation by ionizing radiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 8th/ MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 15th, Sept. 30 - Oct. 5, 2007, Santos, SP. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/18114.
dc.identifier.orcidhttps://orcid.org/0000-0001-5739-7502
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/18114pt_BR
dc.local.eventoSantos, SPpt_BR
dc.publisherSao Paulo: ABEN, 2007pt_BR
dc.rightsopenAccesspt_BR
dc.subjectcobalt 60pt_BR
dc.subjectgamma radiationpt_BR
dc.subjectlubricating oilspt_BR
dc.subjectpollution abatementpt_BR
dc.subjectradiation dosespt_BR
dc.subjectradiolysispt_BR
dc.subjectremovalpt_BR
dc.subjectsulfurpt_BR
dc.subjectwaste oilspt_BR
dc.subjectx-ray fluorescence analysispt_BR
dc.titleAmetryne degradation by ionizing radiationpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorDÉBORA CRISTINA DE ANDRADE
ipen.autorCELINA LOPES DUARTE
ipen.autorMANOEL NUNES MORI
ipen.codigoautor5963
ipen.codigoautor143
ipen.codigoautor169
ipen.contributor.ipenauthorDÉBORA CRISTINA DE ANDRADE
ipen.contributor.ipenauthorCELINA LOPES DUARTE
ipen.contributor.ipenauthorMANOEL NUNES MORI
ipen.date.recebimento07-12pt_BR
ipen.event.datapadronizada2007pt_BR
ipen.identifier.ipendoc12115pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationecfd33b7-fe73-453d-a2fb-baf479097251
relation.isAuthorOfPublicationca559095-3ff4-482d-9d4b-c9662441e5ba
relation.isAuthorOfPublicationdc02869d-55ab-4de8-bfd2-0603a0f0c4db
relation.isAuthorOfPublication.latestForDiscoverydc02869d-55ab-4de8-bfd2-0603a0f0c4db
sigepi.autor.atividadeANDRADE, DEBORA C. DE:5963:2:Spt_BR
sigepi.autor.atividadeMORI, MANOEL N.:169:2:Spt_BR
sigepi.autor.atividadeDUARTE, CELINA L.:143:2:Npt_BR
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