Abstract

Anandrao A. Kale*

ABSTRACT

The sulphonated biomass prepared from stalk of Prunuscerasus was used for investigation of biosorption of Cr (VI). It was found that the biosorption process is dependent on pH value of solution, adsorbent mass, contact time, temperature and initial Cr (VI) concentration. Data of biosorption of Cr (VI) on Sulphonated biomass of Stalks of Prunuscerasus were applied to three adsorption isotherm models. The maximum adsorption capacity was determined from the Langmuir isotherm as 21.0 mg/g. Adsorption process of Cr (VI) ions onto Sulphonated biomass of Stalks of Prunuscerasus (S-III) was found to obey the second-order kinetic equation The n value obtained from the Freundlich isotherm indicates that the sorption of Cr (VI) ions onto Sulphonated biomass of Stalks of Prunuscerasus (S-III) is favourable. Thermodynamic parameters proved that the adsorption process is spontaneous and endothermic. Investigation Kinetic, isotherm and thermodynamic studies on biosorption of chromium (VI) by using activated carbon from Sulphonated biomass of Stalks of Prunuscerasus was conducted in batch conditions. The effect of different parameters such as contact time, sorbent dose, pH and temperature has been studied. Adsorption kinetic modelling data were found out. The kinetics of biosorption results shows that sorption process is well explained by pseudo–second order model with determination coefficients higher than 0.96 for sorbent under all experimental conditions. Thermodynamic parameter via KD, ?G has also been calculated to determine the spontaneity of the process. The value Kp is found to be 0.825 to 2.50 for initial and final concentrations. The low value of activation energy indicates that sorption is an activated and physical process. Thus Kinetic, isotherm and thermodynamic studies on biosorption of chromium (VI) by using activated carbon from Sulphonated biomass of Stalks of Prunuscerasus is a low cost and easily available efficiently used as an excellent sorbent for the removal of chromium (VI) from wastewater.