Decolorization and Degradation of azo dyes in textile wastewater effluent by Aspergillus Niger and Aspergillus ochraceous
College of Education for Pure Sciences, University of Thiqar, Iraq.
Research Article
GSC Advanced Research and Reviews, 2023, 17(03), 109–121.
Article DOI: 10.30574/gscarr.2023.17.3.0473
Publication history:
Received on 07 November 2023; revised on 15 December 2023; accepted on 18 December 2023
Abstract:
In this study, fungi were isolated from contaminated soil collected from textile wool factories in Thi Qar Governorate. The results showed a high potential for removing Methylene Blue dye by Aspergillus niger and Aspergillus ochraceous. The removal process was conducted under optimized conditions, including different concentrations of the azo dye, pH levels, carbon sources, and nitrogen sources. The results indicated that the fungi Aspergillus niger and Aspergillus. Ochraceus were the most common isolates. Both fungi were treated with Methylene Blue dye in solid and liquid media, and both showed the ability to degrade this dye. However, Aspergillus niger demonstrated higher activity in color removal compared to Aspergillus ochraceous, with a diameter of (9) cm in solid medium for Aspergillus niger and (8) cm for Aspergillus. ochraceus. These results were confirmed by statistical analysis, which showed significant differences between these fungi and concentrations. The decolorization percentage was confirmed by Fourier Transform Infrared (FTIR) spectroscopy of which showed complete disappearance of peaks at 500 nm and at 1500 nm, indicates the degradation of dyes due to fungal activity, The technology also confirmed that a pH of 7 was the optimal pH for dye biodegradation compared to pH 4. This was observed through the dry weight of the fungi, with Aspergillus niger reaching to (2.35) and Aspergillus ochraceous reaching to (2.15) at pH 7. Also, in pH 4, the dry weight of Aspergillus niger and Aspergillus. ochraceus reached (2.17) and (2.05) respectively. Furthermore, the study confirmed the potential use of filamentous fungi in treating dye-contaminated water, regardless of their pH values.
Keywords:
Azo dye; Decolorization; Methylene blue; Fungi; FTIR
Full text article in PDF:
Copyright information:
Copyright © 2023 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0
