REMOVAL OF CADMIUM USING COCOS NUCIFARA.L: EQUILIBRIUM AND KINETIC STUDIES

Jun 21st, 2015
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Rapid industrialization generating large quantities of liquid effluents with varying quantities heavy metals. Cadmium is one among them and is toxic when it is present in small quantities.

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REMOVAL OF CADMIUM USING COCOS NUCIFARA.L: EQUILIBRIUM AND KINETIC STUDIES Document By: BharadwajVisit my websitewww.Engineeringpapers.blogspot.comMore Papers and Presentations available on above siteABSTRACT: This investigation comprises the equilibrium and kinetics on biosorption of Cadmium ions from aqueous solutions using `Coconut husk powder in a batch process. The results indicate that biosorption of Cadmium is increased with an increase in adsorbent dosage and decrease in adsorbent size. A significant increase in percentage removal of Cadmium is observed as pH value is increased from 1 to 7 and the percentage removal is decreases beyond pH 7. Increased initial concentration of Cadmium in the aqueous solution results in lower percentage of biosorption. Freundlich and Langmuir isotherm models describe the present data very well indicating favourable biosorption. The biosorption follows pseudo-second-order kinetics.Key words: Adsorption, Isotherms, Kinetics of Cadmium adsorption2.1 INTRODUCTIONRapid industrialization generating large quantities of liquid effluents with varying quantities heavy metals. Cadmium is one among them and is toxic when it is present in small quantities. The effluent based cadmium take different roots for its dispersion including fish, algae and other aquatic flora and fauna. Removal of this metal is vary much essential. Several studies have been conducted with varying degree of success. Toxic heavy metals include cadmium,

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