Activated Sawdust-Based Adsorbent for the Removal of Basic Blue 3 and Methylene Green from Aqueous Media

Dye pollution is a serious threat to aquatic environment and human health. Although activated carbon an efficient adsorbent for dye reclamation from effluents, its expressive nature renders use on large commercial scales. On the other hand, waste biomasses are not effectively used any beneficial purposes. Sawdust biomass of wood mills, due small particle sizes, it has potential be as adsorbent. In spite uses cooking purposes, sometimes such or converted into carbon. raw form, good adsorbent; however, adsorption capacity can increased by applying chemical modifications. present study, sawdust paper mulberry (Broussonetia papyrifera) was removal basic blue 3 methylene green water after modification with NaOH HCl in 1 : 1. The prepared characterized SEM FTIR, whereas surface area estimated through already reported method literature. Batch experiments were performed determine isothermal kinetic parameters selected dyes sawdust. effect dosage temperature also evaluated. best fit data achieved pseudosecond-order model which R 2 values approximately equal Langmuir most suitable explain data. optimum 0.05 g both dyes. Different thermodynamic parameters, enthalpy ( id="M2"> ? H = 18.5 8.334 kJ/mol respectively green), entropy id="M3"> S ° 62.41 29.22 kJ/molK Gibbs free energy id="M4"> G ? 83.6 , -410, -1658 (basic blue)/-65, -519, -1139 (methylene estimated, process found endothermic, spontaneous, feasible. increase id="M5"> ? indicates that favorable at high temperature. could loaded contaminants; further needed