Browsing by Author "Tigre Sari, Gloria Eliza"

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    Remoción de colorantes rojo y amarillo de aguas residuales mediante adsorción con paja toquilla, bagazo de caña de azúcar y tusa de maíz
    (Universidad de Cuenca. Facultad de Ciencias Químicas, 2026-02-11) Ochoa Baculima, Ana Belén; Tigre Sari, Gloria Eliza; Peñafiel Tenorio, María Eulalia
    The presence of aniline dyes in effluents from the textile industry constitutes a significant environmental problem due to their toxicity and the risks they pose to human health and aquatic ecosystems. The objective of this work was to evaluate the removal efficiency of red and yellow aniline dyes using toquilla straw, sugarcane bagasse, and corn cobs as adsorbent materials. The research was conducted through batch and continuous system tests. In the batch system, operating parameters such as pH, contact time, and adsorbent dosage were analyzed, in addition to evaluating kinetic and isothermal adsorption models. Subsequently, tests were performed in fixed-bed columns to study the effect of flow rate and bed depth, applying mathematical models to the breakthrough curves. The results show greater removal efficiency for the yellow dye compared to the red, reaching efficiencies greater than 80 %, and a predominant fit to the pseudo-second-order kinetic and Freundlich isothermas. Furthermore, sugarcane bagasse exhibited the highest adsorption capacity and was therefore selected for the column tests. In the continuous system, the yellow dye showed better performance, allowing the treatment of larger effluent volumes and demonstrating greater adsorption capacity, with a good fit to the Yoon-Nelson and Dose-Response models.