Facultad de Ciencias Básicas
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Browsing Facultad de Ciencias Básicas by Author "Rodríguez Pantoja, Vanessa Estefanía"
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Item Evaluación de la acción de residuos agrícolas de papa como materiales carbonosos modificados para la eliminación de contaminantes orgánicos persistentes aguas del río Pasto(Universidad Santiago de Cali, 2024-10-11) Rodríguez Pantoja, Vanessa Estefanía; Ávila Torres, Yenny Patricia; Edwin, Flores LópezWith population growth, the consumption of drinking water and the generation of domestic wastewater (DWW) increase. In cities like San Juan de Pasto - Nariño, the lack of wastewater treatment plants (WWTP) has led to direct discharges into water bodies, affecting the health and quality of water sources. These waters contain high levels of organic matter, which promotes the spread of various diseases and negative impacts on public health. For this reason, advanced oxidation processes (AOPs) have emerged as promising technologies for treating organic pollutants in water, based on the generation of reactive oxygen species (ROS). The use of peroxymonosulfate (PMS) enables the generation of the sulfate radical anion SO4●- and the hydroxyl radical ●OH through the cleavage of the peroxo bond. This oxidizing agent offers advantages such as high oxidative potential and low cost. It has been shown to be effective in treating organic pollutants over a wide pH range and has low toxicity. Carbonaceous matrices derived from agricultural residues can be used to activate it. The biochar produced presents functional groups available on the surface, which promote the formation of oxidizing species or enhance adsorption processes. These materials, seen as carbocatalysts in the presence of PMS, are relatively inexpensive, abundant, and can be easily reused. During the development of this research, carbonaceous materials from potato peels (a Nariño biomass) were synthesized, characterized, and functionalized for application in an adsorption and organic matter removal process in a wastewater sample as an alternative to improving its quality. Potato peel carbonization and activation with MnCO3 were carried out to enhance the adsorption and carbocatalysis process. Good results were obtained with concentrations of 0.1 g/L of activated carbon at an initial pH of 5.8. It was determined that the degradation pathway of acetaminophen occurs mainly through singlet oxygen andsuperoxide anion radical, as well as electron transfer on the surface of the manganese-impregnated carbonaceous material, with 100% degradation of the target molecule.