top of page


Author - 

Nitin S. Kasture


The p-Nitrophenol, (PNP) is a simpler nitro-aromatic compound, which is found to be a very toxic to the plants, animals and human being. It is a high priority pollutant and has poses a significant health and the environmental hazards due to its’ mutagenic and the carcinogenic activities. p-Nitrophenol and other nitro-aromatic compounds has been considered to be the highly resistant to the biodegradation. Due to the purification of soil, water which get contaminated with nitro-aromatic is very tedious task since they are found resistant to the conventional bioremediation techniques. There are various external factors found to affect the process of bioremediation. The aim of the present work was to study the effect of physical parameters like pH and temperature on the bioremediation of p-Nitrophenol (PNP) by Pseudomonas aeruginosa. The bioremediation of PNP was observed in pH range from 6 to 10, but the maximum rate of PNP degradation was at pH 7. The temperature also influences the rate of PNP bioremediation. The PNP degradation was studied at different temperature ranges at 150C, 250C, 350C and 450C. This study has found that the most favorable temperature for PNP bioremediation was at 350C.


Bioremediation, Pseudomonas aeruginosa, PNP, pH, Temperature


  • Buscaa, G., Berardinelli, S., Resini, C. & Rodrigues, A. L. (2008). Technologies for the removal of phenol from field streams: A short review of recent development. Journal of Hazardous Materials, 160(2-3). pp265-288.

  • Margesin, R. & Schinner, F. (1997). Effect of temperature on oil degradation by a psychotropic yeast in liquid culture and in soil. FEMS Microbiol. Ecol, 24. pp. 243-249

  • Pritchard, P. H., O’Neill, E. J., Spain, C. M. & Ahern, D. J. (1987). Physical and biological parameter that determine the fate of p-chloroplenol in laboratory test systems. Appl. Environ, Microbiol, 58(1). pp. 1833-1838.

  • Sharma, H. A., Barber, J. T., Ensley, H. E. & Polito, M. A. (1997). A comparison of the toxicity and metabolism of phenol and chlorinated phenols by Lemma gibba, with special reference to 2,4,5- trichlorophenol. Environ, Toxicol, Chem, 16. pp. 346-350.

  • Wei J., Yu, Y., Zhu, W. C. & Wang, L. (2008). Characterization of phenol degradation by Rhizobium sp. CCNWTB 701isolated from AstragalusChrysopteru in mining Tailing Region. Journal of hazardous materials, 151(1). pp.111-117.

  • Zhang, C. L., Yu, Y. Y., Fang, Z., Naraginiti, S., Zhang, Y. & Young, Y. C. (2018). Recent advances in nitroaromatic pollutants bio reduction by electroactive bacteria. Process Biochem, 70. pp. 129-135.

bottom of page