| Abstrakt: |
This article proposes a way to extract phenol from aqueous solution as synthetic wastewater through the biomass (saccharum officinarum)-derived ZnCl2-activated carbon named as SBAC. The surface area and pore radius of SBAC were found to be 415.960 m2/g and 0.725 nm, respectively. Batch adsorption studies were carried out to analyse the percentage removal of phenol under various conditions, such as initial concentration (50–500 mg/L), initial pH (2–12), adsorbent dosage (2–40 g/L), temperature (283–303 K) and contact time (30–360 min). The proposed study has achieved ~94% of maximum phenol extraction, with the adsorption capacity of 9.44 mg/g at an initial concentration of 50 mg/L, dose of 5 g/L, pH of 5.5, contact time of 60 min and temperature of 303 K. The kinetic and equilibrium studies confirmed pseudo-second-order reaction and Radke-Prausnitz isotherm as the best fit. In thermodynamic study, the negative values of ΔG0ads (−21.448 to −24.330 kJ/mol), ΔH0 (−1.059 kJ/mol) and positive value of ΔS0 (0.072 kJ/mol K) confirmed the spontaneity, exothermic nature and randomness of adsorption process, respectively. Regeneration and reusability of SBAC showed 86.45% removal of phenol till fifth consecutive cycles. Cost analysis revealed that the developed SBAC was 14 times less expensive (~718 INR/ 9 $) than commercial activated carbon. From the present study, the developed adsorbent found to be good for wastewater treatment under ambient reaction conditions to achieve clean water. [ABSTRACT FROM AUTHOR] |
