Adsorption of Mercury by Pterocarpus Anglolensis: Study on Adsorption Isotherms and Kinetics

Document Type : Research Article

Authors

1 Department of Applied Chemistry, National University of Science and Technology, Bulawayo, ZIMBABWE

2 Department of Environmental Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Florida, SOUTH AFRICA

3 Department of Chemical Engineering, Vaal University of Technology, Private Bag X021, Vanderbijlpark, 1911, Andries Potgieter Blvd, SOUTH AFRICA

Abstract

The efficiency of Pterocarpus Anglolensis sawdust, an abundantly available waste product of the timber industry, capacity as an adsorbent for mercury was investigated. A series of batch experiments was carried out with experimental conditions of metal concentration, adsorbent concentration, pH, and contact time being changed. The concentration of the metal ion was deduced using spectrophotometric means. The adsorption efficiency was found to be pH-dependent with pH 4 being the optimum. 90 minutes was found to be the equilibrium time with particle size range 90-124 μm being the most efficient. Maximum adsorption of mercury was evaluated at 80.33 %. The experimental data was best modeled by the Freundlich isotherm and Pseudo second-order kinetic models. The calculated adsorption parameters are Kf = 0.0002 L/mg, bF = 3.0 and k2 = 0.00016 g/μg.min.

Keywords

Main Subjects

References

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Iranian Journal of Chemistry and Chemical Engineering
Volume 41, Issue 1 - Serial Number 111
January 2022
Pages 143-153

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