Adsorption Studies of Flourescein on Roots, Stem and Leaves of Phoenix dactylifera

Abstract

The adsorption studies of roots, stem and leaves as adsorbents to remove flourescein dye from its aqueous solution has been carried out as a function of adsorbent dose, contact time, stirring speed, pH and temperature. Acidic pH (3-4), low temperature (10-30 ºC) and low stirring speed (120-240 rpm) were found to be favourable conditions for the adsorption of flourescein dye on all the three adsorbents. The maximum adsorption 100 % at 1 h, 96.7 % at 4 h and 91 % at 2.5 h has been observed for roots, stem and leaves of Phoenix dactylifera, respectively. The adsorption equilibrium process has been described well by using Langmuir, Freundlich adsorption isotherms and pseudo-second order kinetics. Present studies showed that roots can be used as low cost adsorbent for the removal of flourescein dye from its aqueous solution as compared to roots and stem.