"lab-scale studies have been conducted on decolorization of single synthetic dye solutions and simulated dye wastewaters by fungal biosorption/biodegradation, there is a need to enerate relative performance data on real dye effluents [37,38]. Decolorization of industrial effluent from dyeing industry is shown in Figure 3. At pH 7.0 and 9.0, decolorization by Myrothecium sp. IMER1 at the effluent concentrations of 30% (v/v) was 73 and 70%, respectively, whereas in the case of white-rot fungi tested less than 25% of decolorization was observed. The result showed that Myrothecium sp. IMER1 had higher color removal efficiency than these white-rot fungi tested under neutral and alkaline conditions. On the one hand, when UV-VIS spectra of dye effluent-containing culture fluid for defined intervals were scanned from 350-800 nm, a marked decrease in absorbance maximum at 510 nm was observed at 6-days incubation, which was related to the breakdown of the chromophoric group in dyes of the effluent (Figure 3b and 3c ). On the other hand, the mycelia became deeply colored at the beginning of decolorization, and thenbecame faint, finally almost disappeared (Figure 3d). Spectra analyses of culture supernatants and color changes in fungal cells suggested that dyes in the effluent were removed by Myrotheciumsp. IMER1 mainly due to enzymatic reaction.
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Last date updated on July, 2014