ADSORPTION OF LEAD (II) IONS FROM SYNTHETIC WASTEWATER USING COCONUT SHELL CARBONS ACTIVATED BY NAOH
In this study, Carbons made from coconut shells that were activated with NaOH used to remove Pb (II) from aqueous solutions. SEM was used to analyze the structure and porous morphology of coconut shell carbons. Adsorption behavior was also investigated, as are the conservation equations and kinetics of sorption on carbons synthesized from coconut shells, as well as the impacts of adsorbent dose, agitation time, and starting concentration level. The findings demonstrate that the formation of rich porous structures was promoted by a material containing an appropriate weight percentage of NaOH. When it came to remove Pb (II) from aqueous solutions, the adsorbent produced from coconut shells had a significant specific surface area of 1550 m2/g and a high adsorptive capacity. According to kinetic data, pseudo-second-order kinetic models best represent adsorption. After intra-particle diffusion and external diffusion, this happened during the adsorption process.
Keywords: Activated carbon, porous, isothermal, adsorption, and coconut shell carbons.