Speciation of Cr(III) and Cr(VI) in aqueous solution and their removal by oyster mushroom biomass

Authors

  • M N M Asif Department of Chemistry, Jahangirnagar University, Savar, Dhaka, Bangladesh
  • Rashedul Islam Department of Chemistry, Jahangirnagar University, Savar, Dhaka, Bangladesh
  • MA Goni Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
  • Sumon Ganguli Department of Applied Chemistry and Chemical Engineering, University of Chittagong, Chittagong, Bangladesh
  • Ashok Kumar Chakraborty Department of Applied Chemistry and Chemical Engineering, Islamic University, Khustia, Bangladesh
  • Mahbub Kabir Department of Chemistry, Jahangirnagar University, Savar, Dhaka, Bangladesh
  • Md Abdus Sabur Department of Chemistry, Jahangirnagar University, Savar, Dhaka, Bangladesh

DOI:

https://doi.org/10.3329/jbas.v47i2.66872

Keywords:

Biosorbent, mushroom powder, chromium, adsorption isotherm, pH envelope, metal removal.

Abstract

This study investigates the effectiveness of oyster mushroom (Pleurotus platypus) for the removal of Cr(III) and Cr(VI) from aqueous solutions by conducting a series of batch adsorption experiments. Results from the adsorption pH envelope experiments show that while the adsorption of Cr(III) increases with increasing pH, the adsorption of Cr(VI) decreases as the pH rises. These two distinct pH envelope patterns for Cr(III) and Cr(VI) suggest that the adsorption processes are primarily driven by the electrostatic force of attractions followed by the ligand exchange process. Findings from the adsorption isotherm experiments demonstrate that chromium binding to the adsorbent surface is better described by the Freundlich model than the Langmuir model, underscoring the presence of multiple surface binding sites. The study highlights the significance of identifying dominant chromium species before they are subjected to adsorptive removal from contaminated waters.

J. Bangladesh Acad. Sci. 47(2); 267-275: December 2023

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Published

2023-12-21

How to Cite

Asif, M. N. M. ., Islam, R. ., Goni, M., Ganguli, S. ., Chakraborty, A. K. ., Kabir, M. ., & Sabur, M. A. . (2023). Speciation of Cr(III) and Cr(VI) in aqueous solution and their removal by oyster mushroom biomass. Journal of Bangladesh Academy of Sciences, 47(2), 267–275. https://doi.org/10.3329/jbas.v47i2.66872

Issue

Vol. 47 No. 2 (2023)

Section

Research Articles