Tecnología de burbujas finas y ultrafinas: actuales y potenciales aplicaciones en el área agroindustrial.
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
En los últimos años se han hecho grandes esfuerzos para encontrar un método idóneo para la caracterización de burbujas finas (BF) y ultrafinas (BUF). En esta investigación se aplicaron dos tecnologías para la caracterización de las burbujas, dispersión dinámica de la luz (DLS) y microscopía de luz transmitida. La caracterización mediante DLS evidenció la presencia de partículas en suspensión diferentes a las burbujas, sin embargo, se logró demostrar la presencia de estas últimas gracias a las diferencias expuestas entre muestras blanco y muestra de burbujas. En general existió una tendencia al aumento del diámetro de las burbujas a través del tiempo. Un leve cambio de pH no evidenció diferencias significativas en los resultados. Los resultados de potencial ζ (potencial zeta) mostraron un comportamiento errático, pero se comprobó la existencia de burbujas en suspensión cargadas negativamente. Con la caracterización mediante microscopía de luz transmitida, se descubrió la existencia de burbujas finas y ultrafinas presentes de forma natural en la muestra control AUP-Azul de metileno, de las cuales el 98% correspondieron a diámetros menores a 1 μm. Por otro lado se encontró una mayor concentración de burbujas en la muestra BUF- azul de metileno, de las cuales el 94% correspondieron a diámetros menores a 1 um. Las aplicaciones de BF y BUF que se han reportado en los últimos años, en diferentes ámbitos de la ciencia, son extrapolables al área agroindustrial.
In recent years, great efforts have been made to find an ideal method for the characterization of fine bubbles (FB) and ultrafine bubbles (UFB). In this investigation, two technologies were applied to characterize the bubbles: dynamic light scattering (DLS) and transmitted light microscopy. The characterization by using DLS evidenced the presence of another particles in suspension other than bubbles, however, it was possible to demonstrate the presence of the FB and UFB, thanks to the differences between blank samples and bubble samples. In general, there was a tendency to increase the diameter of the bubbles over time. A slight change in pH did not show significant differences in the results. The ζ potential (zeta potential) results, showed erratic behavior, but the existence of negatively charged suspended bubbles was verified. By using transmitted light microscopy, the existence of FB and UFB, naturally found in the UPW-Methylene blue control sample was discovered, of which 98% corresponded to diameters less than 1 μm. On the other hand, a higher concentration of bubbles was found in the UFB-Methylene blue sample, of which 94% corresponded to diameters less than 1 um. The applications of BF and BUF that have been reported in recent years, in different areas of science, can be extrapolated to the agroindustrial area.
In recent years, great efforts have been made to find an ideal method for the characterization of fine bubbles (FB) and ultrafine bubbles (UFB). In this investigation, two technologies were applied to characterize the bubbles: dynamic light scattering (DLS) and transmitted light microscopy. The characterization by using DLS evidenced the presence of another particles in suspension other than bubbles, however, it was possible to demonstrate the presence of the FB and UFB, thanks to the differences between blank samples and bubble samples. In general, there was a tendency to increase the diameter of the bubbles over time. A slight change in pH did not show significant differences in the results. The ζ potential (zeta potential) results, showed erratic behavior, but the existence of negatively charged suspended bubbles was verified. By using transmitted light microscopy, the existence of FB and UFB, naturally found in the UPW-Methylene blue control sample was discovered, of which 98% corresponded to diameters less than 1 μm. On the other hand, a higher concentration of bubbles was found in the UFB-Methylene blue sample, of which 94% corresponded to diameters less than 1 um. The applications of BF and BUF that have been reported in recent years, in different areas of science, can be extrapolated to the agroindustrial area.
Description
Tesis presentada para optar al grado de Magíster en Ingeniería Agrícola con mención en Agroindustrias
Keywords
Burbujas, Nanotecnología - Investigaciones, Agricultura de precisión - Chile, Agroindustrias - Chile