Application of Licorice-derived Activated Carbon in Tannery Wastewater Treatment

Document Type : Research Paper

Authors

Department of Environmental Engineering, Faculty of Environment, University of Tehran, Tehran, Iran

Abstract

This study used licorice-derived activated carbon to absorb chromium and COD from tannery wastewater. Wastewater used in this research was prepared from Charm Shahr Industrial Estate. First, licorice was converted into activated carbon using zinc chloride as an activator. The licorice-derived activated carbon was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) analysis. Licorice-derived activated carbon was then used to adsorb Cr and COD from tannery wastewater. Factors affecting the adsorption rate, including pH, adsorbent dosage, contact time, and temperature, were investigated. The optimal conditions were pH=7 and adsorbent dosage of 2 g/100 ml. Also, the test time of 30 minutes was determined as the optimal time. Licorice-derived activated carbon adsorbed 99.93% and 99.22% of Cr (III) and COD, respectively. According to the results, Cr and COD adsorption by licorice-derived activated carbon followed the Freundlich isotherm. In addition, Cr and COD adsorption by licorice-derived activated carbon followed the pseudo-second-order kinetic model.

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References

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Journal of Medicinal plants and By-Products
Volume 13, Special
November 2024
Pages 741-746

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