Exploration of Basidiomycetes for Anthraquinone Dyes Decolorization in
Textile Wastewater
Abstract
Anthraquinone (AQ) dyes are utilized extensively in the textile industry
due to their ability to fasten fabrics. The intricate and rigid
structures of AQ dyes, however, prevent them from bio-degradation. They
also create nitrate residues, which persist as effluents in textile
wastewater and harm aquatic vegetation by obstructing light from
entering the water, which affects both flora and fauna. The use of
bio-remediation technique is most popular because it is environmentally
beneficial and economical. The aim of this study was to isolate white
rot fungi (WRF) for their ability to decolorize AQ dyes and their
mixtures. The current study shows the decolorization of the mixture of
AQ dyes namely Remazol Brilliant Blue R(RBBR), Acid Blue 129 (AB129),
and Alizarin Cyanin Green (ACG) (200ppm) in 24h by using suspended
fungal isolates, WF2 (92.76%) and VS12 (93.71%) isolated from decaying
wood, under optimized parameters like pH7, temperature 30˚C and shaking
speed 80 rpm. The highest manganese peroxidase activity (2391.77 U/mL)
was found in WF2 followed by VS12 (2318.28U/mL) in 24h. Moreover, the
study revealed that manganese peroxidase is one of the causes for
decolorization of AQ dyes since decolorization was directly proportional
to manganese peroxidase activity. On the basis of morphological features
and a complete sequence analysis of 18S rRNA gene and ITS region, the
isolates were identified as Trametes cubensisWF2 and
Polyporus umbellatusVS12. This is the first report of white rot
fungal isolates T. cubensisWF2 and P. umbellatusVS12 used
in efficient decolorization of mixture of AQ dyes (RBBR, AB129, ACG).
Practitioner Points White rot fungal isolates T.
cubensis WF2 and P. umbellatus VS12 offer an effective and
eco-friendly solution for decolorization of mixture of AQ dyes (RBBR,
AB129, ACG). The ligninolytic enzyme system gives white rot fungus the
ability to degrade AQ dyes Optimizing operational parameters and
techniques enables efficient decolorization of AQ dyes by WRFs