The Kinetic, Equilibrium and Application Studies for Removal of Methylene Blue from Aqueous Solution Using Sesbenia Dates Activated Carbon

Abstract

In the present work, sesbenia dates as local agriculture waste, has been successfully used for the preparation activated
carbon (AC) by sulphuric acid. This sulphuric acid based activated carbon (SD) and (MSACS) were used for the
removal of one cationic dye viz., methylene blue (MB) from aqueous solutions. The structure and physical and
chemical properties of (SD) and (MSACS) are investigated using (FTIR) and (SEM) analysis and pH surface and
Boehm titration. The effect of the differential experimental parameters controlling the adsorption of dye onto (SD)
and (MSACS), were thoroughly investigated, such as the effect of pH, initial dye concentration, contact time and
adsorbent dosage in batch mode .Employment of equilibrium isotherm models for the description of adsorption
capacities of (SD) and (MSACS) explores the good efficiency of Langmuir model for the best presentation of
experimental data with maximum adsorption capacity of 38.02 mg/g (SD) and 277.77 mg/g (MSACS) for (MB) dye.
The kinetic data were fitted to the pseudo-second-order kinetic model. Thermodynamic parameters were evaluated to
predict the nature of adsorption. These results point out the exothermic and spontaneous nature of the sorption
process. The results demonstrate that (SD) and (MSACS) are effective in the removal of MB dye from aqueous
solutions and can be used as an alternative to the high-cost commercial adsorbents.