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Homogeneous and heterogeneous catalysts of Fe3+, Co2+ and Cu2+ for the degradation of methyl parathion in diluted aqueous medium

Catalizadores homogéneos y heterogéneos de Fe3+, Co2+ y Cu2+ para la degradación de metilparatión en medio acuoso diluido

dc.creatorVela-Monroy, Cindy A.
dc.creatorSaavedra-Alemán, Martha J.
dc.creatorCarriazo-Baños, José G.
dc.date2016-07-30
dc.date.accessioned2021-03-18T21:02:46Z
dc.date.available2021-03-18T21:02:46Z
dc.identifierhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/43
dc.identifier10.22430/22565337.43
dc.identifier.urihttp://test.repositoriodigital.com:8080/handle/123456789/11380
dc.descriptionDegradation of pesticides (plaguicides, herbicides, fungicides, among others) in aqueous media is a subject of great importance for ensuring the water quality into numerous hydric sources. This work reports the assessment of homogeneous (metal ion solutions) and heterogeneous (oxides supported on alumina) systems that are based on Fe3+, Co2+ y Cu2+, which were used as catalysts for oxidation (degradation) of methyl parathion (a plaguicide) in aqueous solution. Hydrogen peroxide was herein used as oxidizing molecule under mild condition of reaction (25 ºC and atmospheric pressure). The solids were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Fe3+/H2O2 (Fenton system) was the most active homogeneous catalyst compared to Co2+/H2O2 and Cu2+/H2O2 systems. Solids catalysts such as cobalt, copper or iron oxides as well as mixed oxides supported on alumina were active at pH close to neutrality. Fe-Co-Cu/Al2O3, Co-Cu/Al2O3 and Fe-Co/Al2O3 mixed systems were solids with the highest catalytic activity. In addition, an important effect of the support (-Al2O3) on the reaction pH was observed, allowing to reach values close to that of the neutrality, and thus increasing the catalytic activity of both cobalt oxide and copper oxide species. These results allow advancing on a new pathway for searching catalysts to remove organophosphorous pesticides from residual waters.en-US
dc.descriptionLa degradación de pesticidas (plaguicidas, herbicidas, fungicidas, entre otros) en medio acuoso constituye un tema de enorme importancia que contribuye a asegurar la calidad del agua de numerosas fuentes hídricas. En el presente trabajo se realizó la evaluación de sistemas catalíticos homogéneos (iones metálicos en solución) y heterogéneos (óxidos soportados en alúmina), basados en Fe3+, Co2+ y Cu2+, en la oxidación (degradación) del plaguicida metilparatión en medio acuoso, empleando peróxido de hidrógeno como oxidante bajo condiciones suaves de reacción (25 ºC y presión atmosférica). Los sólidos se caracterizaron por difracción de rayos X y microscopía electrónica de barrido (SEM). El sistema Fe3+/H2O2 (sistema Fenton) constituye el catalizador homogéneo más activo, en comparación con los sistemas Co2+/H2O2 y Cu2+/H2O2. Los sólidos conformados por óxidos de cobalto, cobre o hierro y óxidos mixtos soportados en alúmina mostraron actividad catalítica a pH muy cercano a la neutralidad. Los sistemas mixtos Fe-Co-Cu/Al2O3, Co-Cu/Al2O3 y Fe-Co/Al2O3 fueron los sólidos de máxima actividad catalítica. Adicionalmente, se observó la influencia del soporte (-Al2O3) en el pH del medio de reacción, permitiendo el acercamiento de dichos valores a la neutralidad y con ello favoreciendo la actividad catalítica de los óxidos de cobalto y de cobre. Los resultados del presente estudio permiten avanzar en una nueva ruta de búsqueda de catalizadores para la eliminación de pesticidas organofosforados contaminantes de aguas residuales.es-ES
dc.formatapplication/pdf
dc.languagespa
dc.publisherInstituto Tecnológico Metropolitano (ITM)en-US
dc.relationhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/43/36
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dc.rightsCopyright (c) 2017 Tecno Lógicasen-US
dc.sourceTecnoLógicas; Vol. 19 No. 37 (2016); 13-28en-US
dc.sourceTecnoLógicas; Vol. 19 Núm. 37 (2016); 13-28es-ES
dc.source2256-5337
dc.source0123-7799
dc.subjectMethyl parathion degradationen-US
dc.subjectiron oxideen-US
dc.subjectcobalt oxideen-US
dc.subjectcopper oxideen-US
dc.subjectheterogeneous catalysts.en-US
dc.subjectDegradación de metilparatiónes-ES
dc.subjectóxido de hierroes-ES
dc.subjectóxido de cobaltoes-ES
dc.subjectóxido de cobrees-ES
dc.subjectcatalizadores heterogéneos.es-ES
dc.titleHomogeneous and heterogeneous catalysts of Fe3+, Co2+ and Cu2+ for the degradation of methyl parathion in diluted aqueous mediumen-US
dc.titleCatalizadores homogéneos y heterogéneos de Fe3+, Co2+ y Cu2+ para la degradación de metilparatión en medio acuoso diluidoes-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeResearch Papersen-US
dc.typeArtículos de investigaciónes-ES


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