Potential biosorbent based on sugarcane bagasse modified with tetraethylenepentamine for removal of eosin Y.

Tetraethylenepentamine (TEPA) modified sugarcane bagasse (SB), a novel biosorbent (TEPA-MSB), was proved to be an effective adsorbent for anionic dyes due to the introduced functional amino groups. FTIR, TG and DSC analysis were employed to characterize the sorbent. The effects of pH, temperature, contact time and initial concentration of dye on the adsorption of eosin Y were investigated. The experimental data fit very well to the Langmuir model, giving a maximum sorption capacity of 399.04 mg/g at 25 °C. And the kinetic data were well described by the pseudo-second-order kinetic model. pH 6 was the optimal pH for eosin Y adsorption, and the maximum adsorption capacity of TEPA-MSB calculated by Langmuir model was 18 times higher than that of SB.