Comparative study of Sugarcane Bagasse Pyrolysis Methods on Phosphate Ion Adsorption Efficiency: Optimization with BBD-RSM
DOI:
https://doi.org/10.48048/tis.2026.13079Keywords:
Adsorption, Waste, Sugarcane bagasse, Phosphate, Pyrolysis, Differential Pulse Voltammetry (DPV), Response Surface Methodology (RSM)Abstract
Utilization of sugarcane bagasse waste as an adsorbent because it has a high silica content, is environmentally friendly, and has a high surface area. Sugarcane bagasse is used as an adsorbent with oxygen pyrolysis (SB@PO) and N2 (SB@PN) methods, both of which are applied to reduce phosphate waste in water. The adsorption method was chosen to reduce phosphate levels in wastewater. Adsorption parameters include adsorbent mass, contact time, and initial concentration of phosphate solution. Response Surface Methodology (RSM) and Box-Behnken design (BBD) methods are used to optimize the process. Phosphate levels are measured using Differential Pulse Voltammetry (DPV). The characterizations carried out include: FTIR, XRD, FESEM-EDX, and N2 adsorption-desorption. SB@PO obtained material with a crystalline structure and rich in silica while SB@PN obtained material rich in carbon and amorphous structure. The adsorption optimization results showed that SB@PO was superior to SB@PN, namely the percentage removal and adsorption capacity were 95.97% and 43.48 mg/g for SB@PO, while SB@PN was optimal with the percentage removal and adsorption capacity of 65.75% and 2.2×10−4 mg/g, respectively.
HIGHLIGHTS
- Sugarcane bagasse was transformed into SB@PO and SB@PN adsorbent for phosphate adsorption.
- The different pyrolysis method with variations in oxygen (SB@PO) at 500 °C and nitrogen (SB@PN) at 400 °C.
- The specific surface area of SB@PO at 236.971 m2/g and SB@PN at 0.139 m2/g.
- The phosphate removal uses the adsorption method with measurements using the voltammetry method, optimized using the BBD-RSM approach.
- The phosphate recovery with SB@PO adsorbent of 95.97% and SB@PN adsorbent of 65.75%.
- SB@PO provides the best adsorption performances with an adsorption capacity of 43.48 mg/g compared to SB@PN of 2.2×10−4 mg/g.
GRAPHICAL ABSTRACT
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