Equilibrium isotherms and kinetic studies for the adsorption of Methylene blue onto biochar from Parkia Speciosa Pod

Abstract

The ability of Parkia Speciosa pod (PSP) or commonly known as petai pod based biochar as bioadsorbent was investigated in order to utilise the waste generated. Methylene Blue (MB) dye was used as adsorbate and the adsorption was carried out in a batch system. The influence of various initial dye concentrations on the adsorption capacity was evaluated. Adsorption equilibrium data was best described by Langmuir isotherm model with R 2 of 0.997 and qmax of 1.175 mg/g. Overall, biosorption kinetics was found to fit well the pseudo-first order model. The maximum removal percentage of 99.06% was achieved at 25mg/L of initial concentration.