Browsing by Author "Segovia Tello, Lissette Alejandra"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Estudio cinético y termodinámico de la adsorción de sulfanilamida sobre alofán sintético
    (Universidad Técnica de Ambato. Facultad de Ingeniería en Sistemas, Electrónica e Industrial. Maestría en Química, 2021) Segovia Tello, Lissette Alejandra; Silva Yumi, Jorge Efrén
    The presence of emerging compounds, mainly antibiotics, in surface water, groundwater, drinking water and wastewater is the result of continuous incorporation through different anthropogenic activities, the inability of the treatment process in water systems for human consumption and inadequate final disposal. The identification of these compounds has raised environmental concern due to the potential risk they cause, since antibiotics, because of their physicochemical characteristics, are difficult to remove and therefore accumulate in their original form or metabolites, generating problems of aquatic ecotoxicity, negative effects on biota and human health. An alternative for the removal of these compounds is adsorption, which is a fast, economical method that does not generate toxic by-products and is carried out with solid adsorbent materials such as allophane, zeolite, activated carbon, among others. In the present work, the adsorption capacity of sulfanilamide on synthetic allophane was determined through the batch adsorption method and fixedbed column chromatography, where correlations between sulfanilamide concentrations, allophane doses and pH were performed. Synthetic allophane nanoparticles with an average diameter of 40.35 nm were obtained through the coprecipitation method using sodium silicate (Na2SiO3) and aluminum nitrate (Al(NO3)3) salts, characterization was performed by Uv-vis spectroscopy, IR and SEM. Adsorption studies performed by batch system and quantified by UV-vis spectroscopy determined that from 8 mg L -1 of sulfanilamide at pH 7 and 13 a maximum adsorption of 2.11% and 2.82% respectively, with 5 mg of allophane and at slightly acidic pH 5.6 a maximum adsorption of 4.43% is given with 100 mg of allophane and by the fixed bed column method at pH 5.6 a 15% adsorption was generated with 1000 mg of allophane.