Bioremediation of gasoil by two indigenous bacterial strains in contaminated soils
Paper Details
Bioremediation of gasoil by two indigenous bacterial strains in contaminated soils
Abstract
Some industrial activities may lead to hydrocarbon contaminations of soil. Bioremediation of these contaminants is more effective than the other physical-chemical remediation methods. Biological options are described by the term bioremediation, ‘the elimination, attenuation or transformation of polluting or contaminating substances by the use of biological processes, to minimize the risk to human health and the environment’ Therefore, the objective of this study was to investigate the efficiency of two autochthonous bacteria in bioremediation at optimal condition. These bacteria were isolated from oil-contaminated soils, southern Tehran refinery. The experimental section was carried out thorough three steps: (i) Isolation and purification of indigenous bacterial from contaminated soils of south Tehran refinery. (ii) Preparation of the soil, which was used as a medium for bioremediation. (iii) Determination of biological removal of gasoil from soil. Results indicated that in optimal environmental conditions (temperature, 27 ±2 °C, humidity of 60% WHC and daily aeration), bacterial isolates were able to degrade, about 93% of gasoil during the period of 45 days. This rate of removal seems to be acceptable, regarding to the short period of the experiments.
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