Synthesis of Activated Carbon from Corn Cob and Factors Affecting its Adsorption and Desorption Efficiency of Cationic Brilliant Green Dye

Year : 2025 | Volume : 12 | Issue : 03 | Page : 27 44
    By

    Mizbawu Kanea Gurmu,

  • V. Murali M.E.,

  • Tariku Tadesse Gemeda,

  • Yoobsan Ejeta Amensisa,

  1. Lecturer, Department of Environmental Engineering, College of Engineering and Technology, Bule Hora University, Bule Hora, Ethiopia
  2. Former Lecturer, Department of Environmental Engineering, College of Engineering and Technology, Bule Hora University, Bule Hora, Ethiopia
  3. Lecturer, Department of Environmental Engineering, College of Engineering and Technology, Bule Hora University, Bule Hora, Ethiopia
  4. Lecturer, Department of Food Technology and Process Engineering, Oda Bultum University, Chiro, Ethiopia

Abstract

Extreme dye pollutants released from textile, leather, and pulp industries are becoming a major concern to the water. These pollutants are highly toxic to living things. The major objective of this study was to prepare low-cost and efficient activated carbon from corncob (CCAC) adsorbent through the H2SO4 activation method and characterize its suitability for removing brilliant green dye (BGD) from aqueous solution. The adsorption and desorption efficiency of the prepared CCAC sample were evaluated. The CCAC samples were found to be amorphous materials based on XRD measurements. According to the FTIR spectrum, the CCAC’s chemical structure included a variety of functional groups. The morphology of CCAC was studied using the SEM image analysis. This study investigated the factors affecting the adsorption and desorption efficiency of the synthesized CCAC. As a result, the maximum adsorption efficiency of 95.7%, 94.37%, 98.1%, and 99.56% at pH = 8, contact time = 20 min, the dosage of CCAC = 0.3 g, and initial concentration = 43 mg/L, respectively. The BGD removal fits into the Freundlich isotherm model, which is different from the Langmuir model, with a correlation coefficient R2 of 0.999. Batch experiments were performed on synthetic wastewater and the effect of operating parameters such as pH, initial concentration of dye, Contact time, and adsorbent dosage were studied. The adsorption mechanism fits more Freundlich isotherm than with the correlation coefficient R2 = 0.999. According to the investigation, a maximum adsorption capacity of 98.4 mg/g was achieved. The maximum and minimum desorption efficiency of 92.45% and 43.8% were obtained at 1M HCl and 0.125 M CH3OH, respectively. In general, the synthesized CCAC was effectively used to remove BGD from aqueous solution with desired efficiency and therefore, it can be a promising material for the removal of dye pollutants from water and wastewater.

Keywords: Adsorption, brilliant green dye, corn cob, activated carbon, desorption

[This article belongs to Journal of Water Pollution & Purification Research ]

How to cite this article:
Mizbawu Kanea Gurmu, V. Murali M.E., Tariku Tadesse Gemeda, Yoobsan Ejeta Amensisa. Synthesis of Activated Carbon from Corn Cob and Factors Affecting its Adsorption and Desorption Efficiency of Cationic Brilliant Green Dye. Journal of Water Pollution & Purification Research. 2025; 12(03):27-44.
How to cite this URL:
Mizbawu Kanea Gurmu, V. Murali M.E., Tariku Tadesse Gemeda, Yoobsan Ejeta Amensisa. Synthesis of Activated Carbon from Corn Cob and Factors Affecting its Adsorption and Desorption Efficiency of Cationic Brilliant Green Dye. Journal of Water Pollution & Purification Research. 2025; 12(03):27-44. Available from: https://journals.stmjournals.com/jowppr/article=2025/view=212969


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Regular Issue Subscription Original Research
Volume 12
Issue 03
Received 08/04/2025
Accepted 06/06/2025
Published 10/06/2025
Publication Time 63 Days
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