Journal Of Tropical Biosciences
Volume No: 11|
Page No: 42
| FullText PDF
Title: BIOREMEDIATION OF TRANSMISSION OIL CONTAMINATED DERNO-PODZOLUIVISOLIC SOIL UNDER DIFFERENT SOIL MOISTURE CONDITIONS USING PSEUDOMONAS PUTIDA
ALONGE, O. O.
DEPARTMENT OF BIOLOGICAL SCIENCES, BAZE UNIVERSITY, ABUJA
This article examines the critical effect of different soil moisture content on the rate of petroleum hydrocarbon degradation, and on the performance of Pseudomonas putida contained in the biopreparation Pseudomin in the clean-up of transmission oil contaminated derno-podzoluvisolic soil. Results of the research showed that the optimal condition in enhancing the efficacy of Pseudomin was noted under conditions of around 60% of maximum soil moisture capacity. The rate of petroleum hydrocarbon degradation in the soil samples under this soil moisture condition was accelerated up to 3 times, in comparison with soil moisture conditions of around 30% and conditions of complete saturation, which significantly slowed down the process of bioremediation in the soil samples. This shows that soil moisture capacity at 60% is ideal for enhancing the performance of Pseudomonas putida.
In conclusion, generally the application of Pseudomonas putida for the decomposition of transmission oil contaminated derno-podzoluivisolic soil showed a very high efficiency rate, especially under soil moisture conditions of 60%, as in only 12 weeks of experiment, the hydrocarbon oxidizing microorganism was able to reduce the total petroleum hydrocarbon content up to 96.3%. The residual amounts of petroleum hydrocarbon in the soil after the experiment were significantly lower than the approximate safe exposure levels for soils of the mid and southern taiga of Russia