Abstract
Though many microorganisms that are capable of using phenol as sole sourceof carbon have been isolated and characterized, only a few organisms degradingsubstituted phenols have been described to date. In this study, one strain ofmicroorganism that is capable of using phenol (3000 ppm), 4-aminophenol(4000 ppm) and 4-acetamidophenol (4000 ppm) as sole source of carbon andenergy was isolated and characterized. This strain was obtained by enrichmentculture from a site contaminated with compounds like 4-acetamidophenol,4-aminophenol and phenol in Pakistan at Bhai Pheru. The contaminated siteis able to support large bacterial community as indicated by the viable cellcounts (2 × 104–5 × 108) per gram of soil. Detailed taxonomic studies identified the organisms as Pseudomonas species designated as strain STI. The isolate also showed growth on other organic compounds like aniline, benzene, benzyl alcohol, benzyl bromide, toluene, ρ-cresol, trichloroethylene and o-xylene. Optimum growth temperature and pH were found to be 30 °C and 7, respectively, while growth at 4, 25 and 35 °C and at pH 8 and 9 was also observed. Non growing suspended cells of strain ST1 degraded 68, 96 and 76.8% of 4-aminophenol (1000 ppm), phenol (500 ppm) and 4-acetamidophenol (1000 ppm), respectively, in 72 hrs. The isolation and characterization of Pseudomonas speciesstrain ST1, may contribute to efforts on phenolic bioremediation, particularly in anenvironment with very high levels of 4-acetamidophenol and 4-aminophenol.
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Ahmed, S., Javed, M.A., Tanvir, S. et al. Isolation and characterization of a Pseudomonas strain that degrades 4-acetamidophenol and 4-aminophenol. Biodegradation 12, 303–309 (2001). https://doi.org/10.1023/A:1014395227133
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DOI: https://doi.org/10.1023/A:1014395227133