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dc.contributor.authorPorras López, Jazmín-
dc.contributor.authorFernández Hincapié, Jhon Jairo-
dc.contributor.authorTorres Palma, Ricardo Antonio-
dc.contributor.authorRichard, Claire-
dc.date.accessioned2020-01-18T14:02:18Z-
dc.date.available2020-01-18T14:02:18Z-
dc.date.issued2014-
dc.identifier.citationPorras-López, J., Fernández Hincapié, J. J., Torres-Palma, R.A., & Richard, C. (2014). Humic Substances Enhance Chlorothalonil Phototransformation via Photoreduction and Energy Transfer. Environmetal Sciencie & Technology, 48(4), 2218-2225. https://doi.org/10.1021/es404240xspa
dc.identifier.issn0013-936X-
dc.identifier.urihttp://hdl.handle.net/10495/13369-
dc.description.abstractABSTRACT: The photodegradation of chlorothalonil, a polychlorinated aromatic fungicide widely used in agriculture, was investigated under ultraviolet–visible irradiation in the presence and absence of different humic substances that significantly enhance the chlorothalonil phototransformation. On the basis of a kinetic model, an analytical study, the effect of scavengers, the chlorothalonil phosphorescence measurement, and varying irradiation conditions, it was possible to demonstrate that this accelerating effect is due to their capacity to reduce the chlorothalonil triplet state via H-donor reaction and to energy transfer from the triplet humic to ground state chlorothalonil. Energy transfer occurs at wavelengths below 450 nm and accounts for up to 30% of the reaction in deoxygenated medium upon irradiation with polychromatic light (300–450 nm). This process is more important with Elliott humic and fulvic acids and with humic acids extracted from natural carbonaceous material than with Nordic NOM and Pahokee peat humic acids. The obtained results are of high relevance to understanding the processes involved in chlorothalonil phototransformation and the photoreactivity of humic substances. Chlorothalonil is one of the rare molecules shown to react by energy transfer from excited humic substances.spa
dc.format.mimetypeapplication/pdfspa
dc.language.isoengspa
dc.publisherACS Publicationsspa
dc.type.hasversioninfo:eu-repo/semantics/publishedVersionspa
dc.rightsAtribución-NoComercial-SinDerivadas 2.5 Colombia*
dc.rightsinfo:eu-repo/semantics/openAccessspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/co/*
dc.subjectHumic Substances-
dc.subjectPhotodegradation of chlorothalonil-
dc.subjectPolychlorinated aromatic-
dc.titleHumic Substances Enhance Chlorothalonil Phototransformation via Photoreduction and Energy Transferspa
dc.typeinfo:eu-repo/semantics/articlespa
dc.publisher.groupGrupo de Investigación en Remediación Ambiental y Biocatálisisspa
dc.identifier.doi10.1021/es404240x-
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85spa
dc.rights.accessrightshttp://purl.org/coar/access_right/c_abf2spa
dc.identifier.eissn1520-5851-
oaire.citationtitleEnvironmental Science & Technologyspa
oaire.citationstartpage2218spa
oaire.citationendpage2225spa
oaire.citationvolume48spa
oaire.citationissue4spa
dc.rights.creativecommonshttps://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.publisher.placeEstados Unidosspa
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1spa
dc.type.redcolhttps://purl.org/redcol/resource_type/ARTspa
dc.type.localArtículo de investigaciónspa
Aparece en las colecciones: CIEN (Centro de Investigaciones en Ciencias Exactas y Naturales)

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