ADSORPTIVE REMOVAL OF CADMIUM (II) FROM AQUEOUS SOLUTION BY USED BLACK TEA LEAVES AND COFFEE BEAN POWDERELIZABETH PHILIP, MOHAN THOMAS, GEORGE SEBASTIAN AND K. C. PHILIPAbstract UBTL and CBP biomaterial residues were found to effectively adsorb Cd(II) from aqueous solution. The equilibrium amount adsorbed, calculated from the kinetic study, was well expressed by the Langmuir and Freundlich equations. The solution pH had a profound effect on the adsorption rate. The results demonstrate the potential of agricultural wastes as a convenient and low-cost adsorbent of heavy metals. Heavy metal removal techniques using such biomaterials would be an effective method for the economic treatment of wastewater.
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