Adsorption of malachite green onto carbon prepared from borassus bark

Abstract EN

An activated carbon prepared from Borassus bark, a low-cost source, by sulphuric acid activation, was tested for its ability to remove malachite green in aqueous solution.

The parameters studied included contact time, initial dye concentration, carbon dose, pH, and temperature.

The adsorption followed first order rate equation and the rate was mainly controlled by intra-particle diffusion.

Freundlich and Langmuir isotherm models were applied to the equilibrium data.

The adsorption capacities (Qm) obtained from the Langmuir isotherm plots were 20.70, 20.25, 19.76, and 19.34 mg / g at 30, 40, 50, and 600C, respectively, at an initial pH of 6.0.

The temperature variation study showed that the malachite green adsorption was endothermic and spontaneous with increased randomness at the solid solution interface.