Oleaster seed-derived activated carbon/ferrite nanocomposite for Pb2+removal from wastewater

In this study, Lead ions (Pb2+) were separated from simulated polluted water using Fe3O4/C nanocomposite. The superparamagnetic behavior of the nanocomposite was a crucial advantage in separating powders after the biosorption process. The influence of various experimental conditions was optimized through batch study. The adsorption of Pb2+ by Fe3O4/C composite was highly pH-dependent. In order to reach the maximum removal efficiency, optimal conditions of pH = 7, adsorbent dose of 5 mg, and contact time of 30 min were determined and the corresponding adsorption efficiency R = 99.83% and adsorption capacity q = 123.5 mg/g was obtained. Evaluation of adsorption kinetics, linear and non-linear isotherms were also investigated. The pseudo-second-order model and Sips best fitted the adsorption kinetics. The results of the temperature investigation confirmed the spontaneity of the process. Activated carbon from Oleaster seeds had a very high potential for surface adsorption and intraparticle diffusion. It also showed a high adsorption capacity for lead ions in each cycle.

Automated summary

Lead ions (Pb2+) were separated from simulated polluted water using Fe3O4/C nanocomposite. The superparamagnetic behavior of the nanocomposite was advantageous for separation after the biosorption process. Batch study optimized the experimental conditions and determined that pH = 7, 5 mg of adsorbent dose, and 30 min of contact time led to maximum removal efficiency with adsorption efficiency R = 99.83% and adsorption capacity q = 123.5 mg/g.