Decontamination of Zinc, Lead and Nickel from Aqueous Media by Untreated and Chemically Treated Sugarcane Bagasse: A Comparative Study

Document Type : Original Article

Authors

1 Department of Chemistry, University College in Al – Jamoum, Umm Al-Qura University, 21955, Makkah, KSA.

2 Chemistry Department, Faculty of Science, Al-Azhar University, Assiut branch, 71524, Assiut, Egypt.

3 Chemistry Department, Faculty of Science,Albaha University, KSA.

Abstract

A methodology treatment was developed to removethe toxic metals suchas Zn(II), Pb(II) and Ni(II) from its aqueous solution using sugarcane bagasse (SB). In this study, Variety parameters like pH, contact time, adsorbent dose and the initial metal ions concentration were studied in batch experiments. The maximum removal capacities for Zn(II) were 92% for untreated SB and 96% for treated SB with H2SO4, for Pb(II) were found 86% for untreated SB and 92% for treated SB with H2SO4 while for Ni(II) were found 78% for untreated SB and 90% for treated SB with H2SO4 at optimum conditions. The maximum removal of Zn(II), Pb(II) and Ni(II) was obtained at 5 ppm initial concentration. It was noted that the metal ions removal capacity of this adsorbent was SB-H2SO4> SB-native, which indicated that the chemical treatment of SB enhanced the biosorption of metal ions. To describe the adsorption isotherms, langmuir and freundlich models were used. The Langmuir isotherm was found to be in a good agreement with experimental data of R2 value equal to 0.99 while R2 value at the range (0.91-0.97) for Freundlich isotherm. The biosorption process obeyed pseudo-second-order kinetics. This study showed that SB is a suitable and low cost-effective adsorbent for Zn(II), Pb(II) and Ni(II) ions removal of from their aqueous solutions.

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History

  • Receive Date: 05 June 2021
  • Revise Date: 02 September 2021
  • Accept Date: 06 September 2021

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