oa South African Journal of Chemistry - Removal of lead from aqueous solution by palm kernel fibre
|Article Title||Removal of lead from aqueous solution by palm kernel fibre|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Author||E. Augustine Ofomaja, I. Emmanuel Unuabonah and N. Abiola Oladoja|
|Publication Date||Jan 2005|
|Pages||127 - 130|
|Keyword(s)||Change in solution pH, Kinetics, Lead(II), Palm kernel fibre and Sorption|
The sorption of lead on palm kernel fibre, an agricultural waste product, has been studied. The sorption process was studied as a function of initial lead concentration and initial solution pH. The percentage lead removal was found to increase with increasing initial solution pH up to pH 5 and then to decrease as pH was increased to 6. The pseudo-second order kinetic rate model was employed in the analysis of the kinetics of lead uptake onto the palm kernel fibre. The results show that the pseudo-second order model fits the experimental data with high coefficients of determination (r2). The equilibrium sorption capacity was found to be 33.33 mg -1 when 1.0 g of fibre was contacted with 90 mgdm-3 of lead solution at pH 5. Mathematical expressions were derived to relate the pseudo-second order rate constant, k, and the change in solution pH with initial lead concentration.
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