Modelling the removal of lead from synthetic contaminated water by activated carbon from biomass of Diplocyclos Palmatus by RSM

Abstract

Diplocyclos Palmatus biomass activated carbon (DPAC) was used in this work to remove lead (II) ion from the synthetic wastewater. The DPAC was characterized for structural, surface morphology by SEM, whereas, the functional group was analyzed by FT-IR and XRD analysis. The Removal of Pb2+ was studied by batch method and various experimental parameters namely effect of Pb2+ concentration, contact time, effect of temperature; pH and effect of matrix were also studied. The Kinetic modelling studies showed that the adsorption of Pb2+ ion follows pseudo second order mechanism and Langmuir isotherm model was found to fit better for this study. The Thermodynamic study showed a negative value for ΔG indicating the process was spontaneous. Box Behnken Design using response surface methodology as DOE was carried out in this work. The RSM modelling was found to be successful in predicting the removal efficiency with R2 greater than 0.95.