Equilibrium and Kinetics of Adsorption in the Removal of Fluoride from Water using Pinus Kesiya Bark
نویسنده
چکیده
Fluoride removal from water is being investigated using a natural adsorbent derived from bark of pinus kesiya. Batch studies were performed to study the effect of adsorbent dose, contact time, initial fluoride concentration and pH on the removal efficiency. The fluoride adsorption varies over wide range of pH and best in between 3 – 8. The rate of adsorption was rapid and maximum removal took place during the first 120 min and reaches pseudoequilibrium slowly after 180 min. Kinetic study shows that adsorption follows pseudo-second-order, and that the nature of adsorption mechanism is a chemisorption process. The surface adsorption as well as intra-particle diffusion contributes to the rate-limiting step.
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