Equilibrium, Kinetic and thermodynamic study of adsorption of Safranine O dye from aqueous solution by Bael tree(Aegle marmelos)bark powder

Abstract
Bael tree bark powder is used as an adsorbent to remove Safranine O (SO) dye from aqueous solutionsThe percentage of Safranine O dye removal, the effects of initial dye concentration, variou s temperatures, contact time, pH influence, and adsorbent dose were examined. An increase in contact time, adsorbent dose, and temperature the betterremoval of SO dye is observed. To examine the equilibrium data, Langmuir and Freundlich adsorption isotherms were applied. The Langmuir
adsorption isotherm was used to validate the homogeneous adsorption of SO onto Bael tree bark.The mono layer adsorption capacity of Bael tree bark was found to be 4.88 x 10-4mol/g. Using fictitious first order and second order equations, the kinetic data was examined. The kinetic analyses revealed that chemisorption of the SO dye over the bark of the bael tree powder follows the pseudo-second order (R2 = 0.999). The use of bael tree bark powder for removal of the SO dye
can be considered to be the best approach as far as water quality and environmental safety is concerned.