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Volume 13, Issue 3 (July 2019)
IJT 2019, 13(3): 21-26 |
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Mehrdad S, Saeb K, Taghavi L, Ghane M. Evaluation of the Biodegradation of Petroleum Contaminants by Pseudomonas Aeruginosa in the Caspian Sea Coastline Waters. IJT 2019; 13 (3) :21-26
URL: http://ijt.arakmu.ac.ir/article-1-750-en.html
URL: http://ijt.arakmu.ac.ir/article-1-750-en.html
1- Department of Natural Resources and Environment, Science & Research Branch, Islamic Azad University. Tehran, Iran.
2- Department of Environment, Tonekabon Branch, Islamic Azad University. Tonekabon, Iran. , keivansaeb@gmail.com
3- Department of Microbiology, Tonekabon Branch, Islamic Azad University. Tonekabon, Iran.
2- Department of Environment, Tonekabon Branch, Islamic Azad University. Tonekabon, Iran. , keivansaeb@gmail.com
3- Department of Microbiology, Tonekabon Branch, Islamic Azad University. Tonekabon, Iran.
Abstract: (2868 Views)
Background: Water plays an essential role in supporting life on earth and sea worldwide, requiringclean, safe, high quality and sustainable resources. Nowadays, many water resources have been contaminatedwith toxic compounds originating from petroleumdue to economical and industrial developments. There is anurgent need to clean up the waters with environmentally friendlyand inexpensive methods. This study investigated the biodegradation of total petroleum hydrocarbons (TPH) using Pseudomonas aeruginosa (P. aeruginosa) in southern Caspian Sea coastline.
Methods: Coastline sediment samples were collected, with P. aeruginosa being the predominant strain. The bacteria were cultured in triplicates in the presence of 0.5, 1, 2 and 4% of gasoline andunder specific experimental conditions of varying temperature, pH, salinity, shaker speed, and incubation periods. The data representing the gasoline biodegradation in the samples were statistically analyzed.
Results: At optimized experimental conditions for temperature, pH, salinity, incubation period, and shaker speed, maximum biodegradation of TPH was achieved by culturing P. aeruginosa strains with the sea water samples containing varying concentrations of gasoline.
Conclusion: The gram-negative bacteria, P. aeruginosa, almost completely biodegraded TPH contaminants from the samples’ culture media over 28 days of incubation. We conclude that the use of P. aeruginosa is an efficient method for the biodegradation of Caspian coastal waters contaminated with TPH.
Methods: Coastline sediment samples were collected, with P. aeruginosa being the predominant strain. The bacteria were cultured in triplicates in the presence of 0.5, 1, 2 and 4% of gasoline andunder specific experimental conditions of varying temperature, pH, salinity, shaker speed, and incubation periods. The data representing the gasoline biodegradation in the samples were statistically analyzed.
Results: At optimized experimental conditions for temperature, pH, salinity, incubation period, and shaker speed, maximum biodegradation of TPH was achieved by culturing P. aeruginosa strains with the sea water samples containing varying concentrations of gasoline.
Conclusion: The gram-negative bacteria, P. aeruginosa, almost completely biodegraded TPH contaminants from the samples’ culture media over 28 days of incubation. We conclude that the use of P. aeruginosa is an efficient method for the biodegradation of Caspian coastal waters contaminated with TPH.
Keywords: Caspian Sea Waters, Gas Chromatography, Gasoline Biodegradation, Petroleum Hydrocarbons, Pseudomonas Aeruginosa
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The Iranian Journal of Toxicology
Arak University of Medical Sciences in collaboration with the Iranian Society of Toxicology
Website: http://ijt.arakmu.ac.ir
Email: tox.journal@gmail.com
