Comparison of Two-Stage Sorption Design Models for The Removal of Lead Ions by Polyvinylalcohol Modified Kaolinite Clay.
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Date
2009
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Publisher
Elsevier
Abstract
Kaolinite clay obtained from Ubulu-Ukwu, Delta State in Nigeria was modified with polyvinyl-alcohol
(PVA) reagent to obtained PVA-modified Kaolinite clay. Kinetic and equilibrium data were obtained for
the batch adsorption of Pb2+ onto PVA-modified Kaolinite clay.
Time-dependent Langmuir and pseudo-second order kinetic models (TDLM and PSOM) were developed
to predict the optimized minimum operating time for the adsorption of Pb2+ onto PVA-modified Kaolinite
clay in a two-stage batch adsorber system. Results obtained suggest that the two-stage batch adsorber
process leads to improved contact time and increased percentage Pb2+ removal.
Data from both models (TDLM and PSOM) were compared using t-test and F-test and were found to be
precise enough for use in the optimization of kinetic data for a two-stage adsorption of Pb2+ ions from
aqueous solution.
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Keywords
Optimization, Clay, Two-stage, Kaolinite clay, Models, Batch adsorption