Eliminación de Ag(I) en efluentes líquidos contaminados
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2021-07-09
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Jaén: Universidad de Jaén
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[ES] En este trabajo se estudió la capacidad de biosorción de Ag(I) del hongo Penicillium sp. 8L2, aislado de aguas residuales urbanas de la depuradora de Linares. Se realizó un diseño experimental, un ensayo cinético cuyos datos obtenidos se ajustaban a un modelo cinético de pseudo-segundo orden y un ensayo de equilibrio donde los resultados obtenidos se ajustaron mejor a la ecuación de Freundlich. Para completar el estudio, se utilizaron las técnicas de FE-SEM-EDX donde se comprobó que los iones Ag(I) forman agregados en la superficie del hongo, espectroscopía FTIR donde se observa que los grupos funcionales OH, NH2, NO2, S, CO y Cl están implicados en el proceso de biosorción y la técnica de difracción de rayos X con la cual se confirmaron que entre los precipitados de plata se encontraban coloides de plata cristalina.
[EN] In this work, the Ag (I) biosorption capacity of the fungus Penicillium sp. 8L2, isolated from urban wastewater from the Linares treatment plant. An experimental design was carried out, a kinetic test whose data were obtained adjusted to a pseudo-second order kinetic model and an equilibrium test where the results were obtained better adjusted to the Freundlich equation. To complete the study, FE-SEM-EDX techniques were used where it was found that Ag (I) ions form aggregates on the surface of the fungus, FTIR spectroscopy where it is observed that the functional groups OH, NH2, NO2, S, CO and Cl are involved in the biosorption process and the X-ray diffraction technique with which it was confirmed that crystalline silver colloids are found among the silver precipitates.
[EN] In this work, the Ag (I) biosorption capacity of the fungus Penicillium sp. 8L2, isolated from urban wastewater from the Linares treatment plant. An experimental design was carried out, a kinetic test whose data were obtained adjusted to a pseudo-second order kinetic model and an equilibrium test where the results were obtained better adjusted to the Freundlich equation. To complete the study, FE-SEM-EDX techniques were used where it was found that Ag (I) ions form aggregates on the surface of the fungus, FTIR spectroscopy where it is observed that the functional groups OH, NH2, NO2, S, CO and Cl are involved in the biosorption process and the X-ray diffraction technique with which it was confirmed that crystalline silver colloids are found among the silver precipitates.