Optimizing Conditions for the Decolorization of Reactive Red 194 in Synthetic Wastewater by Native Fungus Trametes species

Articles in Press

Authors

1 Dept. of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran

2 Biochemical & Bioenvironmental Research Center- Sharif University of Technology- Tehran- Iran

Abstract

In this research, the removal of Reactive Red 194 dye from synthetic wastewater by Trametes species fungus through biological adsorption and enzymatic degradation was investigated, and the impact of carbon source, pH, and initial azo dye concentration on the amount of decolorization was examined. Examination of various carbon sources revealed that decolorization with glucose, due to its higher laccase enzyme activity, reached 91.29%, which is 1.5 times higher than color removal with sucrose and molasses. At pH 4, the maximum decolorization (93.57%) was observed due to the enhanced growth of the fungus. At an initial dye concentration of 50 mg/L, approximately 94% color removal was achieved, but at higher concentrations (150 mg/L), decolorization decreased by 21%, potentially attributed to increased dye toxicity and reduced laccase enzyme activity. Results indicated that under optimum conditions, 91/95% color removal occurred, with 68.15% attributed to enzymatic degradation and 23.80% to adsorption. Therefore, color removal is mainly due to the intense activity of the laccase enzyme. Additionally, COD and TOC parameters decreased by 16.85% and 19.74%, respectively, indicating a reduction in organic pollutants. Hence, Trametes sp. fungus proves to be an environmentally friendly and efficient method for the removal of azo dyes from synthetic wastewater.

Keywords

Journal of Water and Wastewater Science and Engineering

Articles in Press, Accepted Manuscript
Available Online from 31 January 2024

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History

  • Receive Date: 16 October 2023
  • Revise Date: 27 January 2024
  • Accept Date: 31 January 2024

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