Correlative biosorption equilibria model for a binary batch system
نویسندگان
چکیده
The binary sorption of copper and nickel ions onto peat has been studied. Equilibrium isotherms have been determined for three di!erent copper : nickel molar concentration ratios. The experimental results have been analysed using an extended multicomponent Langmuir equation with a competition term but the correlation between the experimental and the predicted values was poor. An interaction factor was incorporated into the extended Langmuir equation and a signi"cant improvement in correlation was obtained. The "nal model involved deriving an expression to correlate the interaction factor with surface loading and these correlations produced coe$cients greater than 0.995 for all the isotherms. An F-test on the variable interaction factor model developed in this paper con"rmed that it produces a signi"cant improvement in correlating isotherm equilibria data. ( 1999 Elsevier Science Ltd. All rights reserved.
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