Heavy metals removed aqueous solotion by activated carbons prepered from coconut shell and seed shell of the Palm tree
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Date
2006
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Asian network for Scientific Information
Abstract
The purpose of this study is to convert locally vegetal materials such as coconut shell and seed shell of palm tree, which are low-cost, renewable and widely available into inexpensive adsorbent materials for removal of heavy metals (i.e., copper, lead and zinc) from waste water. Both raw materials were chemically activated by phosphoric acid (H3PO4). Various parameters such as adsorbent dose, pH and activation temperature of carbon were studied to establish optimum adsorption conditions. The results showed that the rates of adsorption of metals increase with adsorbent dose. The pH variation showed that maximum adsorption capacities were observed at pH 4. The carbons activated at 400°C display the better adsorption capacities. The amount of metal adsorbed on the activated carbons increases in the order Zn, Cu and Pb. Moreover, the presence of other metallic ions in the solution decreases their rates of removal of each of them.
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Keywords
hevy metal removal, activation, adsorption, activated carbon
Citation
Journal of Applied Sciencecs 2006 6(13) 2789-2793