Membranas poliméricas de PVDF y PS para adsorción de iones de cobre en el agua
DOI:
https://doi.org/10.17533/udea.redin.20250573Palabras clave:
Nanotecnología, fibras, magnetismo, medio ambienteResumen
Un problema de interés mundial es la contaminación del agua con metales pesados, porque afecta la salud humana y los ecosistemas acuáticos. Las membranas de adsorción de iones metálicos se han convertido en una buena alternativa de descontaminación, por tal razón, en este estudio, se presentan resultados de la evaluación fisicoquímica de una membrana polimérica magnética para adsorción de iones de cobre Cu 2+, elaborada con la técnica de electrohilado. Esta membrana está constituida por una matriz de polifluoruro de vinilideno (PVDF) y poliestireno (PS) con incorporación de nanopartículas (NPs) de magnetita (Fe3O4) funcionalizadas con el ácido etilendiaminotetraacético (EDTA). La membrana polimérica se caracterizó morfológicamente a través del Microscopio Electrónico de Barrido por sus siglas en inglés (SEM: Scanning Electron Microscopy) y se identificaron diámetros de fibras alrededor de las 3 µm, la funcionalización con el agente quelante EDTA se demostró con el análisis espectroscópico por Espectroscopia Infraroja por Transformada de Fourier por sus siglas en inglés (FTIR: Fourier-Transform Infrared Spectroscopy). La isoterma de Langmuir sugiere que la máxima capacidad de adsorción de la membrana polimérica de PVDF/PS@Fe3O4-EDTA fue de 25.1 mg g-1 y el estudio magnético mostró un comportamiento superparamagnético y ferromagnético. El material reveló, capacidad de adsorción de iones de cobre debido a los sitios funcionales y la presencia del material magnético nanoparticulado.
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