جستجوی مقالات مرتبط با کلیدواژه « باکتری های بومی » در نشریات گروه « مهندسی شیمی، نفت و پلیمر »

Oil contamination is often inevitable in exploitation, refining, and processing units. The emission of these compounds into the environment causes adverse effects on human health and other living organisms hence, it is necessary to use efficient methods to remove them. Bioremediation by microorganisms is a cost-effective and environmental-friendly method for remediation of oil contamination from the environment which its success depends on microorganisms that are capable to remove of aromatic and aliphatic hydrocarbons. Therefore, it is important to isolation and characterization indigenous-degrading bacteria that are able to tolerance contaminants at a high loading rate. In this study, four bacterial isolates (Arthrobacter citreus, Staphylococcus gallinarum, Bacillus thuringiensis, Paenarthrobacter nitroguajacolicus), which was previously isolated from petroleum-contaminated soils of Naft-Shahr, were used for bioremediation of naphthalene and hexadecane. The result showed although all four strains could utilize naphthalene and hexadecane as only carbon source, whoever B. thuringiensis strain had shown the best efficiency in removal of both compounds. This strain could remove 90.31% of naphthalene (initial concentration of 200 mg L-1) and 78.89% of hexadecane (initial concentration of 1000 mg L-1) with a specific rate of 99.25 mg gcell-1 day-1 and 231.43 mg gcell-1 day-1 during 7 days respectively. Based on these results, this biosurfactant-producing bacterium had shown high potential in bioremediation of environment contaminated with aliphatic and aromatic petroleum hydrocarbons.