A Comparative Study of Phenol Removal by Pisum‐sativum Peels Biochars Derived at Different Pyrolysis Temperatures: Isotherm, Kinetic and Thermodynamic Modelling

Abstract

Pea peels were used for the preparation of biochar at different temperatures (250 °C: PP250, 500 °C: PP500 and 750 °C: PP750) using slow pyrolysis for 1 h and used for the phenol removal from an aqueous medium. Biochar samples were characterized by SEM, XRD and FT-IR. The phenol removal was examined as a function of pH, temperature, and NaCl and urea concentration. The optimum pH and temperature were found to be 6.0 and 25 °C respectively. Presence of NaCl and urea primarily affected the adsorption capacity of PP250 and slightly affected the adsorption potential of PP500 and PP750. The maximum biosorption capacity for the PP250, PP500 and PP750 were found to be 34.63, 46.70, and 60.10 mg/g respectively. The Langmuir isotherm and Pseudo-second order kinetic model best explained the adsorption. Thermodynamic parameters corroborated the physical and exothermic nature of adsorption. PP750 can preferably be used for phenol removal than PP500 and PP250.

Surface functionalization of magnetite nanoparticles for remediation enhancement of phenol from aqueous solutions

“…The obtained KF value of 1.1308 suggests a high tendency of TETA@MNP for phenol adsorption. The "1/n" value of 0.2021 indicates a more heterogeneous system, confirming a chemical process rather than a physical process, consistent with the results from the kinetic study (Mishra et al 2022;Al-Ghouti et al 2020;Ariffin et al 2019).…”