Microflora involved in textile dye waste removal

Abstract

Textile dyes are heavily used in factories for coloring different cloth materials. This work was designed to identify microorganisms capable of removing textile dyes, either by biodegradation or by biosorption. We expected to isolate microorganisms adapted to high dye concentrations from sites near textile industry complex. An experiment was conducted to study the efficiency of the isolates in removing textile dyes. The tested dyes were used as carbon and nitrogen sources for isolation of soil and/or water microorganisms capable of removing textile dyes wastes from factories effluent. The results indicated the low efficiency of both bacteria and actinomycetes in clean-up the effluent from the waste dyes in 10-21 days. On the other hand six fungal isolates were obtained by plating factory effluent on Martin's medium and media containing dyes as the sole source of carbon and nitrogen for growth. These isolates fell in two genera, Aspergillus and Trichoderma. Results of these studies revealed the potential capacity of these fungi to decolorize the tested dyes in comparatively short time (2-24 hours) indicating strong efficiency of dye bioremediation by the fungal isolates. Since the process involved is mostly fast interaction between the fungal mycelium and the dye in the media, the possible mechanism could be based on a biosorption of such chemicals on the intact fungal biomass, rather than direct biodegradation of the compounds.

Organosilica Nanoparticles with an Intrinsic Secondary Amine: An Efficient and Reusable Adsorbent for Dyes

“…The Langmuir adsorption isotherm 11,55 assumes that adsorption occurs at specific homogeneous sites within the adsorbents and forms a monolayer on the homogeneous surfaces. The linear form of the Langmuir equation isHere, Q e is the amount of adsorbate adsorbed per unit mass of adsorbent (mg/g), C e is the equilibrium concentration of the adsorbate (mg/L), Q m (mg/g) is the theoretical maximum adsorption capacity, and b (L/mg) is the energy of adsorption.…”

“…10 Biological treatments can be self-sustaining, but are also time-consuming, specific to the type of biotic degradation, and can result in toxic byproducts. 11 …”

Decolorization of Synthetic Dyes and Textile Effluents by Basidiomycetous Fungi

“…Several actinomycetes have been reported to decolorize reactive dyes, including anthraquinone, phthalocyanine, and azo dyes, through adsorption of the dyes to the cellular biomass (Zhou and Zimmerman, 1993). A few of the actinomycete strains were reported to carry out biodegradation of dyes but with low efficacy (El-Rahim et al 2003).…”

Screening of different fungi for decolorization of molasses

“…can be good alternatives as they have 40-55% decolorization efficiency. Although there are studies conducted for decolorization of different dyes by Trichoderma species, in literature no similar study on the molasses decolorization with Trichoderma species was found (1,14). In our study, Penicillium species with a molasses decolorization of 44% were detected as the second most successful fungus (Fig.…”