Publicación:
Relación molar Se:Hg en peces continentales en el norte de Colombia

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dc.contributor.advisorMarrugo Negrete, José Luis
dc.contributor.authorPadilla Ramírez, Camila Alejandra
dc.date.accessioned2022-01-26T13:28:33Z
dc.date.available2022-01-26T13:28:33Z
dc.date.issued2022-01-25
dc.description.abstractHeavy metal pollution mainly by Hg in aquatic ecosystems has great spot due the adverse effects and toxicity of Hg by anthropogenic emissions. Therefore, the presence of mercury (Hg) in its different forms (organic, elemental and mineral) poses as a great concern since it leads to bioaccumulation and biomagnification processes in the environmental composition. On the other hand, Selenium (Se) is known to be an essential micronutrient in biota and fish metabolism, but in high concentrations can generate toxicity instead. Therefore, this work determined Hg and Se concentrations and their relations and distribution in continental fishes in North of Colombia. 308 individuals from 30 species were analyzed in six study areas (Ayapel swamp, Embalse del Guájaro, Represa El Cercado, Río Ranchería, Riosucio and Unguía). Hg was quantified by the EPA-7473 method (thermal decomposition, amalgamation/atomic absorption spectrometry) in a DMA-80 direct mercury analyzer, and Se was determined by EPA-3052 method HG (hydride generation atomic fluorescence spectrometry). To evaluate relations among Hg and Se general concentrations, body mass and total length in muscle of sampled fishes, Pearson's correlation coefficients (peng
dc.description.abstractLa contaminación por metales pesados especialmente a partir de Hg, ha sido de gran interés debido a los efectos adversos que ocasiona en los ecosistemas, mayoritariamente debido a emisiones antropogénicas. Por lo que la presencia de mercurio (Hg) en sus diferentes formas (orgánico, elemental y mineral), genera gran impacto y preocupación puesto que conlleva a procesos de bioacumulación y biomagnificación en los organismos y en las matrices ambientales. Por otra parte, el Selenio (Se) aunque es un micronutriente esencial en el metabolismo de la biota y los peces en general, en altas concentraciones puede generar toxicidad. Por consiguiente este trabajo determino las concentraciones de Hg y Se, su relación molar y distribución en peces continentales en el Norte de Colombia. En total se analizaron 308 individuos pertenecientes a 30 especies en seis zonas de estudio (Ciénaga de Ayapel, Embalse del Guájaro, Represa El Cercado, Río Ranchería, Riosucio y Unguía). El Hg se cuantificó mediante el método EPA-7473 (descomposición térmica, amalgamación, y espectrometría de absorción atómica) utilizando analizador directo de mercurio DMA-80, en tanto que el Se fue determinado a través del método EPA-3052 (generación de hidruros y espectrometría de fluorescencia atómica). Para evaluar la relación entre las concentraciones generales de Se y Hg, la masa corporal, la longitud total en el músculo dorsal de los peces muestreados, se estimaron coeficientes de correlación de Pearson (pspa
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ciencias Ambientalesspa
dc.description.modalityTrabajos de Investigación y/o Extensiónspa
dc.description.resumenLa contaminación por metales pesados especialmente a partir de Hg, ha sido de gran interés debido a los efectos adversos que ocasiona en los ecosistemas, mayoritariamente debido a emisiones antropogénicas. Por lo que la presencia de mercurio (Hg) en sus diferentes formas (orgánico, elemental y mineral), genera gran impacto y preocupación puesto que conlleva a procesos de bioacumulación y biomagnificación en los organismos y en las matrices ambientales. Por otra parte, el Selenio (Se) aunque es un micronutriente esencial en el metabolismo de la biota y los peces en general, en altas concentraciones puede generar toxicidad. Por consiguiente este trabajo determino las concentraciones de Hg y Se, su relación molar y distribución en peces continentales en el Norte de Colombia. En total se analizaron 308 individuos pertenecientes a 30 especies en seis zonas de estudio (Ciénaga de Ayapel, Embalse del Guájaro, Represa El Cercado, Río Ranchería, Riosucio y Unguía). El Hg se cuantificó mediante el método EPA-7473 (descomposición térmica, amalgamación, y espectrometría de absorción atómica) utilizando analizador directo de mercurio DMA-80, en tanto que el Se fue determinado a través del método EPA-3052 (generación de hidruros y espectrometría de fluorescencia atómica). Para evaluar la relación entre las concentraciones generales de Se y Hg, la masa corporal, la longitud total en el músculo dorsal de los peces muestreados, se estimaron coeficientes de correlación de Pearson (pspa
dc.description.tableofcontentsLISTA DE TABLAS…………………………………………………………………...ispa
dc.description.tableofcontentsLISTA DE FIGURAS…………………………………………………………………iispa
dc.description.tableofcontentsLISTA DE ANEXOS…………………………………………………………………iiispa
dc.description.tableofcontentsRESUMEN …………………………………………………………………………..vspa
dc.description.tableofcontents1. INTRODUCCIÓN ......................................................................................... 1spa
dc.description.tableofcontents1.1 ANTECEDENTES ................................................................................. 3spa
dc.description.tableofcontents2. MARCO TEÓRICO ...................................................................................... 7spa
dc.description.tableofcontents2.1 Hg en la biósfera ....................................................................................... 7spa
dc.description.tableofcontents2.2 Metabolismo del Hg en el cuerpo humano ................................................ 8spa
dc.description.tableofcontents2.3 Especies químicas del Hg ......................................................................... 9spa
dc.description.tableofcontents2.4 Ciclo biogeoquímico del Hg .................................................................... 10spa
dc.description.tableofcontents2.5 Hg en la biota acuática ............................................................................ 12spa
dc.description.tableofcontents2.6 Selenio (Se) ............................................................................................ 13spa
dc.description.tableofcontents2.7 Toxicidad del Se ...................................................................................... 13spa
dc.description.tableofcontents2.8 Efecto protector del Se ............................................................................ 14spa
dc.description.tableofcontents2.9 Ciclo biogeoquímico del Se ..................................................................... 16spa
dc.description.tableofcontents3. OBJETIVOS ................................................................................................. 18spa
dc.description.tableofcontents3.1 GENERAL ............................................................................................... 18spa
dc.description.tableofcontents3.2 ESPECÍFICOS ........................................................................................ 18spa
dc.description.tableofcontents4. METODOLOGÍA ........................................................................................... 19spa
dc.description.tableofcontents4.1 Área de estudio ....................................................................................... 19spa
dc.description.tableofcontents4.3 toma de muestras ................................................................................... 22spa
dc.description.tableofcontents4.4 Determinación de Hg en peces ............................................................... 22spa
dc.description.tableofcontents4.5 Determinación de Se en peces ............................................................... 23spa
dc.description.tableofcontents4.6 Determinación de la relación molar Se: Hg ............................................. 23spa
dc.description.tableofcontents4.7 CONTROL DE CALIDAD DEL METODO ANALITICO ............................ 24spa
dc.description.tableofcontents4.8 Tratamiento de los resultados ................................................................. 25spa
dc.description.tableofcontents5. RESULTADOS ............................................................................................. 26spa
dc.description.tableofcontents5.1 Concentraciones de Hg y Se en músculo de los peces muestreados ..... 26spa
dc.description.tableofcontents5.2 Correlaciones entre las concentraciones de Hg y Se, la relación molar Se:Hg, la longitud total y la masa corporal en los peces estudiados ............ 31spa
dc.description.tableofcontents5.3 Distribución de las concentraciones de Hg y Se, la relación molar Se:Hg, la longitud total y la masa corporal en los peces estudiados ........................ 35spa
dc.description.tableofcontents6. DISCUSIÓN ................................................................................................. 40spa
dc.description.tableofcontents7. CONCLUSIONES ......................................................................................... 51spa
dc.description.tableofcontents8. BIBLIOGRAFIA……………............................................................................53spa
dc.description.tableofcontentsANEXOS .......................................................................................................... 77spa
dc.format.mimetypeapplication/pdfspa
dc.identifier.urihttps://repositorio.unicordoba.edu.co/handle/ucordoba/4782
dc.language.isospaspa
dc.publisherUniversidad de Córdoba
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.publisher.placeMontería, Córdoba, Colombiaspa
dc.publisher.programMaestría en Ciencias Ambientalesspa
dc.rightsCopyright Universidad de Córdoba, 2022spa
dc.rights.accessrightsinfo:eu-repo/semantics/embargoedAccessspa
dc.rights.creativecommonsAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)spa
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.keywordsContinental fisheseng
dc.subject.keywordsAquatic ecosystemseng
dc.subject.keywordsSe:Hg molar ratioeng
dc.subject.keywordsHeavy metalseng
dc.subject.keywordsColombiaeng
dc.subject.proposalPeces continentalesspa
dc.subject.proposalEcosistemas acuáticosspa
dc.subject.proposalRelación molar Se:Hgspa
dc.subject.proposalMetales pesadosspa
dc.subject.proposalColombiaspa
dc.titleRelación molar Se:Hg en peces continentales en el norte de Colombiaspa
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttps://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/submittedVersionspa
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Nombre:
license.txt
Tamaño:
14.48 KB
Formato:
Item-specific license agreed upon to submission
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