In a similar study, Sharma and Kaur (2011) conducted batch adsorption experiments with varying contact times (10, 30, 60, 90, 120, 150, and 180 minutes) using an initial dye concentration of 100 mg/L and a 200 mg adsorbent dose of sugarcane bagasse in a 25 mL dye solution at neutral pH and a temperature of 308 K. Their findings also revealed that the initial rapid phase of adsorption is due to the high availability of vacant sites, which gradually becomes saturated over time. The aggregation of dye molecules with increased contact time hampers deeper diffusion into the adsorbent structure, especially at higher energy sites, thus diminishing the influence of prolonged contact time .