Speaker
Description
Coconut husk derived hydrochar (CHH) was synthesized as possible substitute for expensive adsorbents like activated carbon. The feasibility of using the hydrochar to remove methylene blue (MB) dye from aqueous solution was investigated through batch adsorption, kinetic and thermodynamic studies. The removal of dye from aqueous solution was feasible but influenced by temperature, pH, adsorbent dosage and contact time. Variation in the initial concentration of dye did not influence the equilibrium contact time. Optimum adsorption of dye occurred at low adsorbent dosages, alkaline pH and high temperatures. The adsorption process was best described by pseudo-second order kinetic model at 303 ± 1 K. The mechanism of uptake of MB by CHH was controlled by intraparticle diffusion and the minimal changes in peak position and intensities of FTIR analysis suggest functional groups are involved in the adsorption process. The adsorption process was endothermic and spontaneous. CHH showed a promising low-cost adsorbent for treating wastewater containing MB.