title: Rhamnolipids enhance marine oil spill bioremediation in laboratory system.
abstract: This paper presents a simulated marine oil spill bioremediation experiment using a bacterial consortium amended with rhamnolipids. The role of rhamnolipids in enhancing hydrocarbon biodegradation was evaluated via GC-FID and GC-MS analysis. Rhamnolipids enhanced total oil biodegradation efficiency by 5.63%, with variation in normal alkanes, polyaromatic hydrocarbons (PAHs) and biomakers biodegradation. The hydrocarbons biodegradation by bacteria consortium overall follows a decreasing order of PAHs>n-alkanes>biomarkers, while in different order of PAHs>biomarkers>n-alkanes when rhamnolipids was used, and the improvement in the removal efficiency by rhamnolipids follows another order of biomarkers>n-alkanes>PAHs. Rhamnolipids played a negative role in degradation of those hydrocarbons with relatively volatile property, such as n-alkanes with short chains, PAHs and sesquiterpenes with simple structure. As to the long chain normal alkanes and PAHs and biomakers with complex structure, the biosurfactant played a positive role in these hydrocarbons biodegradation.
authors.affiliation: College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316004, China.
authors.forename: Qingguo
authors.initials: Q
authors.lastname: Chen
authors.forename: Mutai
authors.initials: M
authors.lastname: Bao
authors.forename: Xiaoning
authors.initials: X
authors.lastname: Fan
authors.forename: Shengkang
authors.initials: S
authors.lastname: Liang
authors.forename: Peiyan
authors.initials: P
authors.lastname: Sun
mesh_terms: D001419:Bacteria / Q000378:metabolism; D001673:Biodegradation, Environmental; D006017:Glycolipids / Q000737:chemistry*; D010578:Petroleum / Q000032:analysis*; D059392:Petroleum Pollution; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000737:chemistry; D012623:Seawater / Q000737:chemistry; D013501:Surface-Active Agents / Q000032:analysis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000378:metabolism
chemical_list: D006017:Glycolipids; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C418382:rhamnolipid