International Journal of Applied Research
Vol. 3, Issue 6, Part O (2017)
Biodegradation of pigment yellow-73 (PY-73) by Rhizopus stolonifer (Ehrenb.: Link) Lind
HR Ravikumar and CS Karigar
Several dyes are employed in construction industry for providing aesthetic appearance. Among the many dyes that find application in the civil constructions belong to the class of azo-dyes. The quantity of azo-dyes employed is at an enormous extent and may pose a public health concern if disposed in large quantities. The azo-dyes are reported to initiate several health issues which may include allergic reactions and carcinogenesis. The azo-dye, Pigment Yellow-73 (PY-73) finds extensive application in construction of buildings for painting surfaces. Therefore its usage poses an environmental hazard to construction workers and the general public. A fungal strain was isolated from PY-73 painted surface and was identified as Rhizopus stolonifer (Ehrenb: Link) Lind. R. stolonifer decolorized PY-73 and it was degraded through the involvement of chlorophenol and aniline as the metabolic intermediates. The biodegradation of PY-73 by R. stolonifer was enhanced by increased agitation and in the presence of glucose (80%), starch (85%), and sucrose (60%) as the co-metabolic carbon sources for the decolorization. The biodegradation of PY-73 by R. stolonifer was assessed by spectral, TLC and enzyme analysis.
How to cite this article:
HR Ravikumar, CS Karigar. Biodegradation of pigment yellow-73 (PY-73) by Rhizopus stolonifer (Ehrenb.: Link) Lind. Int J Appl Res 2017;3(6):1028-1031.