Summary
A strain ofMyrothecium verrucaria that showed a high capacity for rapid decolorization of textile dye solutions was isolated from soil. As much as 70%, 86%, and 95% of Orange II, 10B (blue) and RS (red) dyes (color index no. 15510, 20470, 23635), respectively, were adsorbed from solutions of approximately 0.2 g dye per liter in 5 h by approximately 4.5 g dry weight of cells per liter of dye solution. Intact cells showed a higher adsorption capacity than disrupted cells for Orange II and RS but not for 10B. Dye bound to cells was recoverable by extraction with methanol and methanol-treated cells were able to be recycled, albeit with a slightly diminished dye-binding capacity. The Tween detergents were shown to reduce dye adsorption. Dyes strongly bound to the fungal biomass required sonication in dH2O or in Triton X-100 or extraction with methanol for their removal. These results suggest that hydrophobic/hydrophilic interactions are important in dye binding.
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Brahimi-Horn, MC., Lim, KK., Liang, SL. et al. Binding of textile azo dyes byMyrothecium verrucaria . Journal of Industrial Microbiology 10, 31–36 (1992). https://doi.org/10.1007/BF01583631
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DOI: https://doi.org/10.1007/BF01583631