Thermodynamic and kinetic of eriochrome black-t adsorption onto Yemeni palm-date stones

Abstract EN

Removal of eriochrome black-T (EB-T) dye from aqueous solutions was performed by adsorption onto Yemeni palm-date stones.

The adsorption isotherm was found to follow the Langmuir model.

Two simplified kinetic models including pseudo-first order and pseudo-second order equation were selected to follow the adsorption processes.

Kinetic studies showed that the adsorption followed pseudo-first order kinetic model.

Various thermodynamic parameters such as Δ? = -3465.3 J/mole and Δ? = -10.1 J/K/mole.

Δ? was founded to be -4495.5, -2195.2, -2235.7 and -45.39 J/mole at 298, 318, 328 and 338 K respectively, the maximum adsorption capacity was equal to 142 mg/g.

The results in this study indicated that the raw Yemeni palm-date stones could be employed as an effective adsorbent for the removal of eriochrome black-T from aqueous solutions-