Abstract
In the present study, water-soluble dyes like methylene blue (MB) and crystal violet (CV) were extracted from aqueous solutions utilizing eucalyptus wood biochar (EWB) produced from eucalyptus wood waste (EWW).EWW was carbonized at 450 o C to form EWB, which was then activated by the addition of zinc chloride (ZnCl2).Characterizations of the EWB were done using scanning electron micrograph (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and surface area studies.Optimized conditions resulted in a maximum adsorption of MB of 14.42 mg/g and CV of 12.95 mg/g over EWB.Adsorption of both dyes on EWB was shown to follow the Langmuir adsorption isotherm model and occurred through pseudo 2 nd order kinetics, according to kinetic and isotherm studies.According to several thermodynamic parameters, such as ∆G o , ∆H o , and ∆S o , the adsorption of dyes onto EWB was an endothermic and spontaneous process.The results of the study suggest that EWB might be a useful adsorbent for removing MB and CV from wastewater.