Removal of Colorants from Sugarcane Juice and Remelt Syrup by Bagasse-Based Biochar–Hydroxyapatite Composites

To enhance both the overall efficiency of the sugarcane industry and the decolorization rate during the clarification process, a composite material of porous carbon and hydroxyapatite was synthesized using bagasse. The investigation focused on examining the adsorption characteristics of this composite on colorants present in sugarcane juice and remelt sugar syrup under various conditions. The results indicated that at a pH level of 7, with adsorbent dosages of 3.75 mg/mL and 7.50 mg/mL, and adsorption times of 120 and 180 min, the decolorization rates for sucrose juice and remelt sugar syrup were achieved 93.19% and 92.41%, respectively. Moreover, regeneration trials revealed the reusability of the adsorbent across several cycles, indicating its practicality for long-term applications. Therefore, the synthesized composite material—comprised of bagasse-derived biochar and hydroxyapatite—represents an environmentally responsible and efficient adsorbent with considerable potential for colorant removal in both sugar juice and remelt syrup.