Evaluación de la eficiencia de remoción de acetaminofén contenido en aguas a escala de laboratorio a través de la técnica de bioadsorción empleando cáscara de cacao y plátano
Fecha
2020-04-14Registro en:
Céspedes, E., & Cortés, M. (2020). Evaluación de la eficiencia de remoción de acetaminofén contenido en aguas a escala de laboratorio a través de la técnica de bioadsorción empleando cáscara de cacao y plátano. Tesis de pregrado. Universidad Santo Tomás. Villavicencio.
reponame:Repositorio Institucional Universidad Santo Tomás
instname:Universidad Santo Tomás
Autor
Cortés Zárate, María Camila
Céspedes Calvo, Enyi Miyerlay
Institución
Resumen
The present project consisted of evaluating the efficiency of removal of acetaminophen to laboratory scale from bioadsorbents based on cocoa and banana peels. It was determined how the parameters (acetaminophen concentration, contact time, activated and non-activated biomass, amount of biosorbent and particle size) intervene in the effectiveness of the bioadsorption process. Then, Langmuir and Freundlich adsorption isotherms were applied to identify the adsorption mechanisms that occurred during the treatment. The experimental data obtained from the adsorption with cocoa peel were better adapted to the Langmuir model with an R2 of 0,97 and for the banana peel they presented better adaptation to the Freundlich model with a correlation coefficient of 0,99. The thermodynamic parameters (ΔG°, ΔH° and ΔS°) were calculated for each of the systems. The Gibbs free energy confirmed the adsorption mechanisms obtained by the isotherms, the negative enthalpy values proved that the adsorption process is exothermic, the positive entropy values indicated that the adsorption process presents a greater degree of randomness and Molecular disorder and the relationship between thermodynamic parameters showed that a spontaneous adsorption process occurred. Finally, the adsorption kinetics for the two biomasses were calculated with the pseudo-first and second order models, resulting in the cocoa shell adsorption corresponding to the pseudo-second order model with an R2 of 0,98. Finally, the adsorption process from activated biomasses presented higher removal efficiencies compared to inactive biomasses, and banana peel proved to be a better bioadsorbent for acetaminophen at a concentration of 10 ppm, a particle size of 0,595 mm and 40 gr of biomass with 98,99% removal, while the cocoa shell with the same concentration and amount of adsorbent and particle size of 0,841 mm had a removal of 92,48%.