Adsorptive removal of cationic dye from aqueous solutions using Bardakçı clay

This study was investigation employed the batch adsorption method using Bardakçı Clay/Van as an adsorbent to remove crystal violent, a cationic dye from aqueous solution. The effects of pH, amount, interaction time and concentration were investigated determine optimal conditions. conditions determined be pH=6, 0.6 g reached equilibrium at 25th minute. isotherm Langmuir, Freundlich Dubinin–Radushkevich (D–R) equations. It discovered conform Langmuir isotherm. In Dubinin-Radushkevich (D-R) model, E value calculated E< 8 kJmol-1, indicating that process occurs physically. Thermodynamic parameters such enthalpy (ΔHo), Gibbs' free energy (ΔGo) entropy (ΔSo) calculated. violet with clay demonstrated endothermic, occurring both physically spontaneously.