Comparative Study of Adsorption of Congo Red on Wheat Husk and Rice Husk

Comparative Study of Adsorption of Congo Red

Authors

  • Irfan Ijaz School of Chemistry, Faculty of Basic Sciences and Mathematics, Minhaj University Lahore, Pakistan
  • Ayesha Bukhari School of Chemistry, Faculty of Basic Sciences and Mathematics, Minhaj University Lahore, Pakistan
  • Ammara Nazir School of Chemistry, Faculty of Basic Sciences and Mathematics, Minhaj University Lahore, Pakistan
  • Momina Feroz School of Chemistry, Faculty of Basic Sciences and Mathematics, Minhaj University Lahore, Pakistan
  • Yasra Naseer Department of Chemistry, Forman Christian College Lahore, Pakistan
  • Awais Bukhari University of the Punjab, Lahore, Pakistan

DOI:

https://doi.org/10.69547/NS.21.03

Keywords:

Wheat husk, Rice husk, dye, adsorption isotherms, Langmuir constant

Abstract

In this comparative study, Congo red dye was removed by utilizing wheat husk and rice husk as a biosorbent. The effects of adsorbent size, adsorbent dose, contact time, adsorbate concentration, pH, stirring rate, and temperature were assessed by batch adsorption experiments. The results have been verified based on Langmuir adsorption isotherm model. Optimal adsorption was observed at a dose of 0.5 g for wheat husk and 1.0 g for rice husk. Rice husk reached the adsorption equilibrium in 30 minutes, while wheat husk required 60 minutes. The percentage of dye removal increased with higher initial dye concentrations and was highest at pH 5 for both adsorbents, but rice husk consistently showed superior adsorption across all pH levels. Stirring rates of 100 rpm yielded the highest adsorption for both adsorbents, with higher stirring rates decreasing adsorption efficiency. Room temperature was optimal for adsorption, while higher temperatures reduced adsorption performance. The monolayer adsorption capacity calculated from Langmuir isotherm was 0.984 (WH) and 0.989 (RH) at 30oC. The study showed that rice husk proved to be the best adsorbent for the removal of congo red dye from aqueous solution as compared to wheat husk when all the parameters of adsorbent were studied.

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Published

2024-03-28

How to Cite

Ijaz, I., Bukhari, A., Nazir, A., Feroz, M., Naseer, Y., & Bukhari, A. (2024). Comparative Study of Adsorption of Congo Red on Wheat Husk and Rice Husk: Comparative Study of Adsorption of Congo Red. Nature’s Symphony , 2(1), 28–39. https://doi.org/10.69547/NS.21.03

Issue

Vol. 2 No. 1 (2024): Nature's Symphony - Volume 2, Issue 1

Section

Chemistry

License

Copyright (c) 2024 Irfan Ijaz, Ayesha Bukhari, Ammara Nazir, Momina Feroz, Yasra Naseer, Awais Bukhari

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