Investigation of adsorption kinetics and isothermal thermodynamics for optimizing methylene blue adsorption onto a modified clay with cellulose using the response surface approach

Abstract In this study, the clay was interwoven with cellulose to change its structure. The product clay/cellulose used assess efficacy of methylene blue (MB) dye removal from aqueous solutions (CC25). response surface methodology and Box-Behnken design were optimize influence crucial parameters (cellulose load, adsorbent dosage, solution pH, temperature, contact duration) (RSM-BBD). greatest effectiveness 98.76% for a loading 25.0% following working conditions, i.e., dosage 0.06 g/L, pH 7, temperature 45 °C, length 20 min. At time, maximum adsorption capacity 254.8 mg/g. pseudo-second-order model, according kinetics research, describe process. MB process endothermic spontaneous, computed thermodynamic functions. developed composite material, our results, has very high color absorption removal.