Use of activated carbon from sapindus for the adsorption of methylene blue

Abstract EN

Activated carbon was produced from Sapindus fruit residue and was used for the adsorption of methylene blue dye from simulated aqueous solution.

Adsorption kinetics of methylene blue onto actived carbon were studied in a batch system.

The effects of pH and contact time were examined.

The goal of the present study was the determination of the optimal experimental conditions.

The maximum adsorption of methylene blue occurred at pH 6.0 (4.83 mg/g) and the lowest adsorption occurred at pH 2.0 (4.35 mg/g).

120 min was the time needed for apparent equilibrium.

Adsorption modelling was determined by using the Freundlich and Langmuir isotherms.

Data were interpreted based on R2 and various error distribution functions.

Adsorption isotherm was best described by non linear Freundlich isotherm model.

In order to determine the best-fit-adsorption kinetics, the experimental data were analyzed using pseudo-first-order, pseudo-second-order, pseudo-third-order, Esquivel, and Elovich models.

The needed relative parameters were determined by linear and non-linear regressive methods.

The statistical functions were estimated to find the suitable method which fit the experimental data.

Both methods were suitable to obtain the required parameters.

The model that best fit the present equilibrium data was the linear Elovich model (type 1 and 2).

The present work showed that activated carbon can be used as a low cost adsorbent for the methylene blue removal from aqueous solutions