Tan, W. T. and Choong, N. Y. and Lee, C. K. (1993) Removal of Chromium (III) from Aqueous Solution by Coconut Husk and Rice Straw. Pertanika Journal of Science & Technology, 1 (2). pp. 179-184. ISSN 0128-7680
Coconut husk fibre and rice straw were found to be able to remove significant amount of Cr (III) ions from aqueous solutions. Its removal is a function of pH and concentration. The optimum pH range for maximum uptake is between 4 and 6 for both substrates. The adsorption capacity was found to be 0.55 and 0.30 millimole Cr (III) / g substrate for coconut husk and rice straw respectively. The adsorption kinetic studies show that the removal process follows a first order rate expression. The breakthrough curves and adsorption efficiency of various columns containing mixed media of coconut husk/rice straw, soil and sand have been obtained. The results demonstrate that these agricultural residues could be used as barriers in a landfill to maximize immobilization of toxic metal ions such as Cr (III) in leachates.
|Keyword:||pH, equilibrium time, adsorption capacity, breakthrough curves.|
|Faculty or Institute:||Faculty of Environmental Studies|
|Publisher:||Universiti Putra Malaysia Press|
|Deposited By:||Nur Izzati Mohd Zaki|
|Deposited On:||24 Nov 2009 00:58|
|Last Modified:||27 May 2013 07:05|
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