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dc.rights.licenseAtribución-NoComercial 4.0 Internacional
dc.contributor.advisorSanabria González, Nancy Rocío
dc.contributor.advisorMacías Quiroga, Iván Fernando
dc.contributor.authorMora Bonilla, Karla Yaneth
dc.date.accessioned2022-03-09T16:29:27Z
dc.date.available2022-03-09T16:29:27Z
dc.date.issued2021-08
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/81167
dc.descriptiongráficos, tablas.
dc.description.abstractLos colorantes azoicos representan cerca del 70% de la producción mundial de colorantes. Estos se caracterizan por tener uno o varios grupos cromóforos de tipo -N=N- unidos a anillos de benceno o naftaleno con grupos -OH y -SO3H, características que los hacen muy estables químicamente y resistentes a la biodegradación. El rojo allura (C18H14N2Na2O8S2) es un colorante azoico ampliamente usado en las industrias alimentaría, farmacéutica y cosmética. Los Procesos de Oxidación Avanzados (POAs) basados en la activación del H2O2 han mostrado excelentes resultados en el tratamiento de aguas coloreadas . En el presente trabajo se utilizó una tecnología emergente (Co2+/NaHCO3/H2O2) para la degradación del colorante rojo allura en solución acuosa, donde el H2O2 es activado con NaHCO3 y el cobalto en solución (Co2+) actúa como catalizador para la descomposición del peróxido de hidrógeno. Para la evaluación y optimización del proceso de oxidación del colorante se utilizó la Metodología de Superficie de Respuesta (MSR), basada en un Diseño Central Compuesto (DCC). En el diseño experimental se estudiaron cuatro variables independientes (concentraciones de H2O2, NaHCO3, cobalto y colorante) y las variables de respuesta fueron decoloración y remoción de nitrógeno total (NT). Bajo las condiciones óptimas de reacción: 49.47 mg/L de rojo allura, 4.53 mM de H2O2, 8.45 μM de Co2+ y 2.00 mM de NaHCO3, se logró una decoloración total y remoción de NT de 55.3±0.53%. Adicionalmente, se encontró que un incremento en la temperatura del sistema de 25 a 45 °C aceleró la decoloración total de la muestra, pasando de 20 a 10 minutos de reacción. Con el fin de abordar la contaminación colateral asociada al cobalto utilizado en la descomposición catalítica del peróxido de hidrógeno, en este trabajo se utilizó una arcilla tipo bentonita para remover los iones de cobalto que quedaron en solución después del proceso de oxidación. Para evaluar el potencial del sistema Co2+/NaHCO3/H2O2 en la degradación de colorantes, se trató una muestra de agua real proveniente de una industria de alimentos de la ciudad de Manizales a las condiciones óptimas obtenidas en el diseño experimental, obteniéndose una decoloración del 96.4±0.34%, y remoción de NT del 17.23±0.12%. Los anteriores resultados sugieren que el sistema Co2+/NaHCO3/H2O2 es eficiente para la degradación de soluciones acuosas que contienen colorantes azoicos, y este es el primer trabajo que establece las condiciones óptimas para la degradación del rojo allura basado en la metodología de superficie de respuesta. Además, se propone un proceso de adsorción al final del POA, que permite reducir la concentración de cobalto a valores por debajo del límite de detección de la técnica de medición (< 0.01 mg/L, absorción atómica de llama).
dc.description.abstractAzoic dyes represent about 70% of the world’s production of dyes. They are characterized by having one or more chromophore groups of the -N=N- type attached to benzene or naphthalene rings with -OH and -SO3H groups, these characteristics make them chemically stable and resistant to biodegradation. Allura red (C18H14N2Na2O8S2) is an azoic dye widely used in food, pharmaceutical and cosmetic industries. Advanced Oxidation Processes (AOPs) based on the activation of H2O2 have shown excellent results in the treatment of colored discharges. In the present work, an emerging technology (Co2+/NaHCO3/H2O2) was used for the degradation of the allura red dye in an aqueous solution, where H2O2 is activated with NaHCO3 and the cobalt in solution (Co2+) acts as a catalyst for the decomposition of peroxide hydrogen. For the evaluation and optimization of the dye oxidation process, the Response Surface Methodology (RSM) was used, based on a Central Composite Design (CCD). In the experimental design, four independent variables were studied (concentrations of H2O2, NaHCO3, cobalt and dye) and the response variables were decolorization and removal of total nitrogen (TN). Under optimal reaction conditions: 49.47 mg/L of allura red, 4.53 mM of H2O2, 8.45 μM of Co2+ and 2.00 mM of NaHCO3, a total decolorization was achieved and a TN removal of 55.3±0.53%. Additionally, it was found that an increase in the temperature in the system from 25 to 45 °C, accelerated the total decolorization of the sample, going from 20 to 10 minutes of reaction. In order to address the collateral contamination associated with the cobalt used in the catalytic decomposition of hydrogen peroxide, a bentonite-type clay was used in this work to remove the cobalt ions remaining in the solution after the oxidation process. To evaluate the potential of the Co2+/NaHCO3/H2O2 system in the dyes’ degradation, a real water sample taken from a food industry in Manizales city was treated under the optimal conditions obtained in the experimental design, obtaining 96.4±0.34% of decolorization, and 17.23±0.12%. of TN removal. The above results suggest that the Co2+/NaHCO3/H2O2 system is efficient for the degradation of aqueous solutions containing azo dyes, and this is the first research study that establishes the optimal conditions for the degradation of allura red based on Response Surface Methodology. In addition, an adsorption process is proposed at the end of the AOP, which allows to reduce the cobalt concentration to values below the detection limit of the measurement technique (< 0.01 mg/L, flame atomic absorption).
dc.format.extentxi, 78 páginas
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subject.ddc620 - Ingeniería y operaciones afines::628 - Ingeniería sanitaria
dc.titleDegradación del colorante rojo Allura en solución acuosa mediante un proceso avanzado de oxidación.
dc.typeTrabajo de grado - Maestría
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.publisher.programManizales - Ingeniería y Arquitectura - Maestría en Ingeniería - Ingeniería Ambiental
dc.contributor.researchgroupProcesos Químicos, Catalíticos y Biotecnológicos
dc.description.degreelevelMaestría
dc.description.degreenameMagister en Ingeniería - Ingeniería Ambiental
dc.identifier.instnameUniversidad Nacional de Colombia
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/
dc.publisher.departmentDepartamento de Ingeniería Química
dc.publisher.facultyFacultad de Ingeniería y Arquitectura
dc.publisher.placeManizales, Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Manizales
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.lembQuímica -- tesis y disertaciones académicas
dc.subject.proposalRojo Allura
dc.subject.proposalProcesos de oxidación avanzada
dc.subject.proposalTratamiento de vertimientos
dc.subject.proposalDiseño central compuesto
dc.subject.proposalAdsorción
dc.subject.proposalArcilla bentonita
dc.subject.proposalAllura red
dc.subject.proposalAdvanced oxidation processes
dc.subject.proposalWastewater treatment
dc.subject.proposalCentral composite design
dc.subject.proposalAdsortion
dc.subject.proposalBentonite-type clay
dc.subject.unescoContaminación del agua
dc.subject.unescoWater pollution
dc.title.translatedDegradation of Allura red in aqueous solution using an advanced oxidation process.
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentImage
dc.type.contentText
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2
dcterms.audience.professionaldevelopmentEstudiantes
dcterms.audience.professionaldevelopmentInvestigadores
dcterms.audience.professionaldevelopmentMaestros
dcterms.audience.professionaldevelopmentPúblico general
dc.description.curricularareaQuímica Y Procesos


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