In this work, entrapped activated carbon was mixed with wastewater from sugarcane using different liquid/solid ratio, pH, and time of operation. Experiments were run in Erlenmeyer flasks at room temperature and 100 rpm. Color reduction of wastewater was evaluated by the decrease in the absorbance at 420, 520, and 620 nm. Best results were achieved using a liquid/adsorbent ratio 0.5:1 (measured as volume of wastewater from sugarcane/volume of entrapped activated carbon), at pH = 6.5-7, and 2 hours of treatment. Under these conditions, about 90% of dye compounds were removed from the sugarcane wastewater. Moreover, results were compared with those achieved in previous works where entrapped carbon was used to remove dyes from vinasses coming from winery industry, observing that entrapped activated carbon is effective to remove dyes independently from the industrial wastewater. Consequently, the results obtained in this study verify the potential application of entrapped activated carbon beads in the design of new eco-friendly, efficient, and low-cost adsorbents for the treatment of wastewater.Keywords: sugarcane; wastewater; adsorption; dye En este trabajo el carbón activo inmovilizado se ha mezclado con agua residual proveniente de la caña de azúcar utilizando diferentes relaciones de líquido/sólido, pH y tiempo de operación. Los experimentos se realizaron en matraces erlenmeyers a temperatura ambiente a 100 rpm. La reducción de color del agua residual fue evaluada por el descenso de la absorbancia a 420, 520 y 620 nm. Los mejores resultados se obtuvieron con una relación líquido/sólido 0,5:1 (volumen de agua residual/carbón activo inmovilizado) a pH = 6,5-7 durante 2 horas de adsorción. Bajo estas condiciones se eliminó un 90% de los compuestos coloreados del agua residual de la caña de azúcar. Además, estos resultados fueron comparados con otros trabajos previos en donde se utilizó carbón activo inmovilizado para la eliminación de compuestos coloreados de las vinazas procedentes de la industria vitivinícola, observándose que el carbón activo inmovilizado es un adsorbente eficaz para la eliminación de compuestos coloreados independientemente de la industria de la cual proceda el agua residual. Por tanto, los resultados obtenidos en este trabajo ponen de manifiesto el potencial del carbón activo inmovilizado para el diseño de nuevos adsorbentes de bajo coste, que a su vez sean eficientes y amigables con el medioambiente durante el tratamiento de aguas residuales.
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