Facile synthesis of sulfur-doped chitosan/biochar derived from tapioca peel for the removal of organic dyes: Isotherm, kinetics and mechanisms

The carbon biomass has extensively been used for water/wastewater purification systems. However, pristine matters have less efficiency in practical applications. Conversely, tuning of with biomaterials widely employed. Herein, a sulfur tethered adsorbent chitosan-tapioca peel biochar ([email protected]) composite was successfully fabricated. tapioca as precursor the fabrication matrix. organic dyes such Malachite Green (MG) and Rhodamine B (RhB) were chosen adsorbates this study, [email protected] shows adsorption 53.35 40.86 mg/g, respectively. dye concentration study 50 mg/L, maximum molecules removal observed at pH range ~8, saturation within 120 min. followed pseudo-second-order kinetics Langmuir isotherm model. fabricated recovered reclaimed five successive cycles after adsorption-desorption process. Electrostatic attractions, hydrogen bonding ?-? interactions essential mechanisms involved system. could be utilized capable treatment