Browsing by Author "Quispe Marcatoma, Justiniano"

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    Eliminación del color del tinte de cochinilla mediante chorro de descarga de plasma a presión atmosférica
    (Universidad Nacional Micaela Bastidas de Apurímac, 2024-01-19) Quispe Quispe, Arturo; Quispe Marcatoma, Justiniano; Pérez Falcón, Luis Fernando
    El uso excesivo de tintes en diversas industrias ha provocado contaminación ambiental, provocando la contaminación de los cuerpos de agua. Para prevenir la contaminación ambiental, es crucial el uso de tintes ecológicos y procesos innovadores para la degradación de tintes. Este estudio tuvo como objetivo investigar el proceso de eliminación del color del tinte de cochinilla (Dactylopius coccus Costa) utilizando la técnica de descarga de plasma a presión tmosférica (APPJ: Jet de Plasma a Presión Atmosférica). El tinte extraído del insecto de la cochinilla fue tratado con APPJ y se analizó el proceso de eliminación de color resultante. Se utilizó espectroscopía de emisión óptica (OES) para investigar las líneas de emisión de plasma y espectroscopía UV-Vis para monitorear el proceso de eliminación de color. Los resultados revelaron que la decoloración del tinte de cochinilla fue resultado de un proceso de degradación oxidativa producido por la interacción de las especies reactivas (NO3− y NO2−) generadas por la descarga de plasma de APPJ con las moléculas del tinte. Este proceso de eliminación de color ocurre en un medio ácido, lo que lleva a un cambio de pH de 5.4 a 2.7. Estos cambios de pH pueden atribuirse a fluctuaciones en las concentraciones de especies reactivas como nitratos y nitritos en la fase líquida. Las mediciones de espectroscopía UV-Vis mostraron que el 90% del color de la cochinilla fue eliminado en los primeros 10 minutos de tratamiento. Este estudio mejora nuestra comprensión de la eliminación natural de color y proporciona información sobre su mecanismo, abriendo posibilidades para modificaciones controladas y aplicaciones en diversos campos.
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    Removal of Cochineal Dye Color through Atmospheric Pressure Plasma Discharge Jet
    (MDPI, Applied Sciences, 2026-03-12) Quispe Quispe, Arturo; Pérez Falcón, Luis F.; Quispe Marcatoma, Justiniano; Landauro, Carlos V.; Peña Rodriguez, Victor A.
    The extensive utilization of dyes across diverse industries has resulted in environmental pollution, leading to the degradation of water bodies. To prevent environmental contamination, the use of eco-friendly dyes and innovative processes for dye degradation is crucial. This study aimed to investigate the color removal process of cochineal dye (Dactylopius coccus Costa) using the atmospheric pressure plasma jet (APPJ: Atmospheric Pressure Plasma Jet) technique. The dye extracted from the cochineal insect was treated with APPJ and the resulting color removal process was analyzed. Optical emission spectroscopy (OES) was used to investigate the plasma emission lines, and UV-Vis spectroscopy was used to monitor the color removal process. The results revealed that the decolorization of cochineal dye was a result of an oxidative degradation process caused by the interaction of the reactive species (NO3− and NO2−) generated by the APPJ plasma discharge with the dye molecules. This color removal process occurs in an acidic medium, leading to a pH change from 5.4 to 2.7. These pH changes can be attributed to fluctuations in the concentrations of reactive species such as nitrates and nitrites in the liquid phase. UV-Vis spectroscopy measurements showed that 90% of the cochineal color was removed within the first 10 min of treatment. This study enhances our understanding of natural color removal and provides insights into its mechanism, opening up possibilities for controlled modification and applications in various fields.
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    Textile Characteristics, Medullation, and Colorimetry of Wool Fiber Dyed with Dactylopius coccus Using Atmospheric Pressure Plasma Jet (APPJ)
    (MDPI, Applied Sciences, 2026-03-12) Quispe Quispe, Arturo; Lozano, Franklin; Machaca Machaca, Virgilio; Quispe Marcatoma, Justiniano
    The industrial and artisanal textile industries necessitate the adoption of sustainable dyeing practices. Although the natural dye derived from Dactylopius coccus presents a viable option, its traditional application requires metallic mordants that pose environmental and health risks. This study investigates the utilization of atmospheric-pressure plasma jet (APPJ) technology for dyeing wool with Dactylopius coccus dye, with the objective of optimizing the process and minimizing its environmental impact. The APPJ technique was employed for wool dyed with Dactylopius coccus dye, and the textile properties, medullation, and colorimetry were evaluated using an optical fiber diameter analyzer (OFDA) and a spectrometer with an integrating sphere. The results demonstrated that the APPJ enhanced the color intensity and uniformity, facilitating improved dye penetration into the fibers. Plasma treatment darkened the fiber, generated reddish and yellowish tones, and increased the color saturation and intensity. The wool samples treated with plasma exhibited an increase in DMF and SF but a decrease in IC and greater size variability. The APPJ reduces total medullation in wool dyed with cochineal dye. In conclusion, the APPJ was demonstrated to be a promising method for dyeing wool with Dactylopius coccus dye, offering an effective and sustainable alternative to traditional methods, with enhanced color vibrancy and uniformity and reduced resource utilization.