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Kinetics and Thermodynamic Studies: Adsorption of Pb, Cr and Ni Ions from Spent Lubrication Oil (SLO) Using Acid Modified Clay
Department of Chemistry, Benue State University, Makurdi, Nigeria
Department of Chemistry, Benue State University, Makurdi, Nigeria
Department of Chemistry, University of Agriculture, Makurdi, Nigeria
Department of Chemistry, Gulu University, Gulu, Uganda
- 1 Department of Chemistry, Benue State University, Makurdi, Nigeria
- 2 Department of Chemistry, Benue State University, Makurdi, Nigeria
- 3 Department of Chemistry, University of Agriculture, Makurdi, Nigeria
- 4 Department of Chemistry, Gulu University, Gulu, Uganda
American Journal of Analytical Chemistry·Volume 12 (2021)·Pages 109–120·Published 18 May 2021·DOI10.4236/ajac.2021.125009
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Abstract
Adsorption of Pb, Cr, and Ni ions from spent lubrication oil (SLO) by sulphuric acid modified clay (SAMC) was investigated considering the effect of contact time and temperature of the adsorption system. The removal percentage of the heavy metals was found to be temperature and contact time-dependent. Adsorption of the heavy metals increases with an increase in temperature and contact time with 95.0% - 100% adsorption recorded at the temperature of 331 K with the equilibration time of 12 hours. The thermodynamic and kinetics investigation of the adsorption process showed that the adsorption of these metals by the modified adsorbent is a spontaneous and endothermic physical adsorption process that followed the pseudo-second-order kinetic model.
KeywordsAdsorptionHeavy MetalsSorption MechanismPseudo-Second-Order Kinetic Model
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