Removal Of Pb2+ And Zn2+ From Aqueous Solution Using Eggshell Powder As Adsorbent: Kinetics And Equilibrium Studies

Authors

  • AJAYI Adetola Abiola The Federal Polytechnic Ilaro. Ogun State. Nigeria
  • Adegbola Olawatosin O. The Federal Polytechnic Ilaro. Ogun State. Nigeria

Keywords:

Metal ion; Adsorption; Eggshell powder; Kinetics; Equilibrium

Abstract

The goal of this study is to use locally produced chicken eggshell powders to remove Pb2+ and Zn2+ from aqueous solutions using an adsorption approach. A local poultry farm provided the chicken eggshell powder used as an adsorbent. By testing their contact time effects in solution with Pb2+ and Zn2+, the adsorbent efficacy was compared to that of other similar biomasses. pH, contact time, beginning metal ion concentration, and sorbent dose all influence the sorption process, with pH 7.0 and a contact time of 60 minutes being the best. The adsorption kinetics were studied using pseudo-first order and pseudo-second order rate measurements. For the adsorption isotherm investigation, Langmuir and Freundlich models were used. With R2 of 0.834 and 0.993, the equilibrium adsorption data of Pb2+ and Zn2+ followed the Langmuir and Freundlich isotherms, respectively. The pseudo-second order rate model best represented the process, while the Freundlich isotherm model was the best fit for Pb2+ and Zn2+ adsorption onto eggshells as an adsorbent, according to the kinetics data. Finally, chicken eggshell powder can be used as a low-cost, effective local adsorbent for the removal of Pb2+ and Zn2+ from aqueous solutions.

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Published

2021-12-29

How to Cite

Ajayi, A. A., & Adegbola, O. O. (2021). Removal Of Pb2+ And Zn2+ From Aqueous Solution Using Eggshell Powder As Adsorbent: Kinetics And Equilibrium Studies. Federal Polytechnic Ilaro Journal of Pure And Applied Science, 3(2), 90–96. Retrieved from https://fepi-jopas.federalpolyilaro.edu.ng/index.php/journal/article/view/50