Thermodynamic And Kinetic Of Eriochrome Black-T Adsorption Onto Yemeni Palm-Date Stones

Abstract

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.