1. Comparison of two-stage sorption design models for the removal of lead ions by polyvinyl-modified Kaolinite clay
- Author
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Unuabonah, E.I., Olu-owolabi, B.I., Okoro, D., and Adebowale, K.O.
- Subjects
- *
WATER purification adsorption , *LEAD removal (Water purification) , *DEIONIZATION of water , *KAOLINITE , *CLAY , *CHEMICAL reagents , *ENGINEERING design - Abstract
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. [Copyright &y& Elsevier]
- Published
- 2009
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