Browsing by Author "Rivera Pillimue, Merly Alexandra"
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Item Desarrollo de materiales basados en Carboximetilalmidón/Quitosano aplicados a la remoción de colorantes en aguas(Universidad Santiago de Cali, 2025-12-11) Rivera Pillimue, Merly Alexandra; Chamorro Rengifo, Andrés Felipe (Director); Cardona Cardona, Yudy Vanesa (Directora)Water contamination due to the presence of dyes and other pollutants, such as heavy metals and pharmaceutical residues, has generated serious risks to human and animal health. Several research studies have developed strategies to remove dyes from water sources, but industries continue to generate wastewater containing dyes, which represents important environmental and ecological challenges. An effective methodology for dye removal is the use of adsorption processes with agricultural organic materials and low-cost ecological adsorbents, such as cellulose, chitosan and starch. In this sense, a hydrogel based on Carboxymethyl starch (CMA)/chitosan was developed with the objective of removing anionic dyes from aqueous sources. This was done in three stages: i) starch modification, ii) formation and characterization of the hydrogel by ionic crosslinking between CMA and chitosan, and iii) evaluation of the removal capacity of the evaluated dyes: Acid Red (AR), Acid Blue (AC), and Brilliant Blue (AB). The hydrogel formed was characterized by Fourier transform infrared spectroscopy (FTIR) to identify functional groups, confirming the modification of starch and the presence of chitosan. In addition, it was determined that the material presented retention capacities of the dyes above 70 %. Thus, this material showed high affinity for anionic dyes, presenting a high potential to be used as a dye retention agent.