Removal of Herbicide from Aqueous Solution Using Granular Activated Carbon: Equilibrium Data and Process Design

Authors

  • Abdulbari A. Ahmad School of Engineering, University of Edinburgh, Edinburgh EH9 3JL, UK

DOI:

https://doi.org/10.59167/tujnas.v9i1.2056

Keywords:

Equilibrium models, GAC, Process design, Adsorption

Abstract

2,4-Dichlorophenoxyacetic acid (2,4-D) herbicide is a widely utilized herbicide known to be moderately toxic, have extensive use, poor biodegradability, and h led to contamination of surface and ground waters. The Granular Activated Carbon (GAC) was characterized by its porosity, surface morphology, and availability of functional groups. Type I isotherm was observed in the GAC, indicating microporosity with specific a surface area of 832.35 m2/g and pore diameter of 0.899 nm. GAC was evaluated for its ability to adsorb herbicide 2,4-D as the model adsorbate and evaluated the effects of initial concentration, contact time, pH, and activated carbon dosage on the adsorption process. According to the results, 94.01 %, 97.17%, 97.76 %, 98.15%, and 98.2 % of the adsorptive removal were achieved at initial concentrations of 10, 20, 30, 40, and 50 mg/l, respectively. Langmuir and Freundlich isotherm models were used to analyze the adsorption isotherm. It was determined that 2,4-D had a maximum monolayer adsorption capacity of 20.28 mg/g for GAC. Freundlich isotherm model predicted uniform binding energy distribution over heterogeneous surface binding sites for the best fit. The Freundlich model was used to design a batch adsorber capable of removing 2,4-D from effluent solutions of different volumes using the required mass of GAC. Resulting of the achieved results, GAC is a highly effective adsorbent for the removal of 2,4-D from aqueous environments.

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Published

26-06-2024 — Updated on 26-06-2024

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How to Cite

Ahmad, A. A. (2024). Removal of Herbicide from Aqueous Solution Using Granular Activated Carbon: Equilibrium Data and Process Design. Thamar University Journal of Natural & Applied Sciences, 9(1), 20 – 26. https://doi.org/10.59167/tujnas.v9i1.2056

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