Adsorption of reactive red 2 dye onto activated carbon prepared from hazelnut shells

Abstract EN

The prepared activated carbon from hazelnut shells (HS) was used to remove the reactive red 2 dye (RR 2) from aqueous solutions, the adsorption behavior of dye onto the porous carbon was studied by varying parameters such as different doses, pH, contact time and temperature.

The amounts of reactive red 2 dye adsorbed increased with an increased temperature.

Adsorption isotherms of reactive red 2 dyes on activated carbon were determined and correlated with common isotherms equations.

It was found that the Langmuir and Freundlich model appears to fit the isotherm data.

The maximum adsorption capacity of dye was 8.67 mg / g at 45 oC and pH 3.

The thermodynamic parameters (ΔGo, ΔHo, ΔSo) were also determined from the temperature dependence, the results showed that the process of adsorption reactive red 2 dye was spontaneous and endothermic process and an increase in temperature favored the adsorption.