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    dc.contributor.authorRojas Silva, Cesar Enrique.-
    dc.date.accessioned2022-11-30T22:07:09Z-
    dc.date.available2018-03-19-
    dc.date.available2022-11-30T22:07:09Z-
    dc.date.issued2018-
    dc.identifier.citationRojas Silva, C. E. (2017). Síntesis y caracterización de nano partículas de magnetita (Fe3o4) para un estudio en la remoción de metales pesados (Zn, Pb, Cr) presentes en el agua, como fortalecimiento a los procesos de tratamiento convencionales [Trabajo de Grado Pregrado, Universidad de Pamplona] Repositorio Hulago Universidad de Pamplona. http://repositoriodspace.unipamplona.edu.co/jspui/handle/20.500.12744/4940es_CO
    dc.identifier.urihttp://repositoriodspace.unipamplona.edu.co/jspui/handle/20.500.12744/4940-
    dc.descriptionEn este documento, se sintetizo un adsorbente efectivo para la eliminación de algunos iones de metales pesados como Cr, Zn y Pb del agua, mediante el método de co-precipitacion de sales férricas y ferrosas bajo presencia de gas nitrógeno y con la ayuda de un agente precipitante (NaOH), obteniendo así una reacción de acuerdo con la formula química de la magnetita, Fe+3[Fe+2 Fe3+]O4. La caracterización cristalográfica del material se realizó mediante DRX obteniendo un tamaño de cristal promedio de 6,9851 nm, en la caracterización química superficial del adsorbente se encontró predominancia de sitios básicos 2,119 (meq/g), sobre los ácidos 1,506 (meq/g) y se determinó el pH en el punto de carga cero el cual presenta un valor de 9,2. El área superficial del adsorbente se estimó mediante isotermas, donde se muestra que la adsorción de las nanopartículas de magnetita siguió el modelo de Langmuir y se obtuvo un área superficial de 1190,3908 m2 /g. La adsorción de iones metálicos en el agua se determinó por espectrofotometría de absorción atómica, dando como resultado un porcentaje de adsorción máxima de magnetita hacia Cr+ , Zn+ y Pb+ en pH 3 de 96,1713 y 95,7856%; 99,6479 y 99,5136%; 99,8993 y 99,6014%; para un tiempo de 60 y 120 min respectivamente, en el caso de pH 7, se obtuvieron resultados ligeramente menores pero con un buen porcentaje de remoción de 97,6837 y 97,0510% para Cr; 99,9473 y 93,6272% para Zn y por ultimo 98,2007 y 90,7694% para Pb en tiempos de 60 y 120 min. Los datos experimentales muestran que las nanopartículas de magnetita sintetizadas presentan buena eficiencia y pueden eliminar cuantitativamente iones de metales pesados del agua.es_CO
    dc.description.abstractIn this work, an effective adsorbent was synthesized for the elimination of some heavy metal ions such as Cr, Zn and Pb from water, by the method of co-precipitation of ferric and ferrous salts under the presence of nitrogen gas and with the help of a precipitating agent (NaOH), thus obtaining a reaction according to the chemical formula of magnetite, Fe+3[Fe+2 Fe3+ ]O4. The crystallographic characterization of the material was carried out by means of XRD obtaining an average crystal size of 6.9851 nm, in the superficial chemical characterization of the adsorbent was found predominance of basic sites 2,119 (meq/g), on acids 1,506 (meq/g) and the pH was determined at the point of zero load which has a value of 9,2. The surface area of the adsorbent was estimated by isotherms, where it is shown that the adsorption of the magnetite nanoparticles followed the Langmuir model and a surface area of 1190.3908 m2/g was obtained. The adsorption of metal ions in water was determined by atomic absorption spectrophotometry, resulting in a maximum adsorption percentage of magnetite towards Cr+ , Zn+ and Pb+ at pH 3 of 96.1713 and 95.7856%; 99.6479 and 99.5136%; 99.8993 and 99.6014%; for a time of 60 and 120 min respectively, in the case of pH 7, slightly lower results were obtained but with a good percentage of removal of 97.6837 and 97.0515% for Cr; 99,9473 and 93,6272% for Zn and finally 98,2007 and 90,7694% for Pb at times of 60 and 120 min. Experimental data show that synthesized magnetite nanoparticles have good efficiency and can quantitatively remove heavy metal ions from wateres_CO
    dc.format.extent66es_CO
    dc.format.mimetypeapplication/pdfes_CO
    dc.language.isoeses_CO
    dc.publisherUniversidad de Pamplona – Facultad de Ingenieras y Arquitectura.es_CO
    dc.subjectEl autor no proporciona la información sobre este ítem.es_CO
    dc.titleSíntesis y caracterización de nano partículas de magnetita (Fe3o4) para un estudio en la remoción de metales pesados (Zn, Pb, Cr) presentes en el agua, como fortalecimiento a los procesos de tratamiento convencionales.es_CO
    dc.typehttp://purl.org/coar/resource_type/c_7a1fes_CO
    dc.date.accepted2017-12-19-
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