Adsorption of crystal violet and methylene blue dyes using a cellulose-based adsorbent from sugercane bagasse: characterization, kinetic and isotherm studies

Biodegradable cellulose based on sugarcane bagasse is produced using alkaline treatment followed by bleaching method for dye removal. FTIR, Raman, SEM, EDS, XRD, and N-2 adsorption-desorption isotherm analysis were utilized to characterize the surface morphology and functional groups of the sugarcane bagasse (SCB) and treated sugarcane bagasse (TSCB). The TSCB was investigated to remove of Crystal violet (CV) and Methylene blue (MB). Different factors influence the adsorption processes such as contact time, adsorbent dose, dye concentration, temperature, pH, and NaCl dose were studied. The Langmuir model was investigated to study the adsorption equilibrium behavior of CV and MB dyes by TSCB. A maximum adsorption capacities (q(max)) of 107.5 and 112.9 mgg(-1) was calculated for CV and MB-dyes, respectively. Also, the adsorption processes are physi-osorption with average energy values of E = 1.151 and 1.101 KJmol(-1) for CV and MB-dyes, respectively. The kinetic data of the investigated processes were controlled by the pseudo-second order (PSO) model with q(e,cal )(mgg(-1)) values of 59.3 and 58.9 mgg(-1) for CV and MB-dyes, respectively. Suggesting that chemical mechanisms may influence the removal of CV and MB dyes. Overall, TSCB was found to be an effective, environmentally friendly, and low-cost material to remove of cationic dyes in this research. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

Biodegradable cellulose based on sugarcane bagasse was prepared and utilized for dye removal. The effects of various factors on the adsorption processes were investigated, and the treated sugarcane bagasse showed high adsorption capacity for Crystal violet and Methylene blue dyes. The adsorption processes were identified as physisorption, and the kinetic data followed the pseudo-second order model. The results suggest that TSCB is an effective, environmentally friendly, and low-cost material for removing cationic dyes.