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Removal of acetylsalicylic acid (ASA) in packed microcolumns with carbon xerogel modified with TiO2 nanoparticles
Remoción de ácido acetilsalicílico (ASA) en microcolumnas empacadas con xerogel de carbono modificado con nanopartículas de TiO2
DOI:
https://doi.org/10.15446/ing.investig.v39n2.67604Keywords:
acetylsalicylic acid, microcolumns, nanoparticles, titanium dioxide, carbon xerogels (en)ácido acetil salicílico, microcolumnas, nanopartículas, dióxido de titanio, xerogeles de carbón (es)
Se evaluó la capacidad de adsorción de ácido acetil salicílico usando xerogel de carbón (XC) y xerogel de carbón modificado con nanopartículas de TiO2 (XCM). Estos materiales se caracterizaron mediante técnicas como la microscopía electrónica de barrido (SEM), difracción de rayos X (DRX) y espectroscopia infrarroja (FTIR). Para el área superficial BET, se encontraron valores como 762 m2/g para XC y 214 m2/g para XCM. Los experimentos de adsorción muestran que el modelo que mejor representa la isoterma es el de Langmuir-Freundlich, ya que mostró una capacidad de adsorción máxima de 17,48 mg/g. En los experimentos en continuo, se evaluó el efecto de la concentración de entrada y la velocidad del flujo sobre la capacidad de adsorción del adsorbente en el lecho microempacado. Las curvas de ruptura concuerdan bien con el modelo de dispersión axial. En vista de su capacidad de adsorción, los xerogeles de carbono son un posible material para la eliminación de contaminantes emergentes de la industria farmacéutica. Además, la incorporación de las nanopartículas de TiO2 permite la implementación de técnicas complementarias, por ejemplo, la fotodegradación, como una alternativa para lograr una mayor eliminación de contaminantes acuosos.
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Copyright (c) 2019 Viviana Eloisa Gomez Rengifo, Adriana Herrera Barros, Jorge Hernan Sanchez Toro
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