Biodegradation of Two Textile Dyes by Bacillus Subtilis

Article type: Research Article

Authors: Almamoori, Anas M.^{; *} | Al-Swefee, Duha Zeki | Alzuhery, Mays Mohammed

Affiliations: Department of Environment, College of Environmental Science, Al-Qasim Green University, Babylon, Iraq | Department of Biology, College of Science, University of Baghdad, Baghdad, Iraq | Department of Biology, College of Science, University of Babylon, Babylon, Iraq

Correspondence: [*] Corresponding Author. [email protected]

Abstract: This study revealed the efficiency of Bacillus subtilis in degrading two textile dyes (disperse red and disperse yellow), the rates of red dye removal when measured after 24, 48, 72 and 96 hours for the concentrations of 50 ppm were 51.67, 67.56, 84.67 and 95.33%, for the concentration 150 ppm were 41.67, 62.67, 80.67 and 89.67%, while for the concentration 300 ppm were 25.67, 42.67, 71.67 and 84.33%. The results of yellow dye removal showed that the concentration of 50 ppm were 49.67, 65.33, 83.33 and 92.67%, for the concentration of 150 ppm were 38.33, 60.33, 77.33 and 87.33%, and for the concentration, 300 ppm were 24, 36.67, 68.33 and 81.67%, when measured after 24, 48, 72 and 96 hours. Results recorded a slight decrease in pH values for all concentrations for each dye during 96 hours. Results also revealed a high reduction of EC and TDS values for both dye concentrations after 96 hours.

Keywords: Bacillus subtilis, biodegradation, pH, EC, TDS, textile dyes

DOI: 10.3233/AJW240036

Journal: Asian Journal of Water, Environment and Pollution, vol. 21, no. 3, pp. 71-76, 2024