A Study on Dye Adsorption Efficiency Using Bagasse – Graphene Oxide Adsorbent

Methylene blue dye is considered a difficult-to-remove large colorant molecule. If contaminated dye water is released into water sources without undergoing treatment, it can have a negative environmental impact. This research has developed sugarcane bagasse-graphene oxide composite as an absorbent material for adsorbing methylene blue dye solution. The characteristics of the absorbent were studied using Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) along with the optimal quantities of graphene oxide and crosslinking agents in the synthesis process. The adsorption behavior was investigated in terms of contact time, initial concentration of methylene blue and initial pH of the solution. The experimental results showed that adsorption reached equilibrium at 60 minutes. The adsorption capacity was higher when the pH of the methylene blue solution increased or became alkaline. The adsorption kinetics followed a pseudo second order kinetic model. The adsorption isotherms of sugarcane bagasse graphene oxide-glutaraldehyde (SCB-GO-GLA) were explained by the Langmuir model. The maximum adsorption capacities of SCB-GO-GLA were 181.85 mg g-1. Finally, the sugarcane bagasse-graphene oxide composite adsorbent can be regenerated and reused.