title: Microbial degradation of four crude oil by biosurfactant producing strain Rhodococcus sp.
abstract: Rhodococcus erythropolis M-25, one of the representative biosurfactant producers, performed effectively during the biodegradation of four crude oil. The microbial degradation efficiency is positively relevant to the API of the crude oil. The chemical dispersant Corexit 9500A did not enhance the biodegradation of the petroleum hydrocarbons during the experimental period. 70.7% of the N-4 oil was degraded after 30days, while in the Corexit 9500A plus sample the biodegradation removal was 42.8%. The Corexit-derived compounds were metabolized by M-25 at the same time of the petroleum hydrocarbons biodegrading. Neither biodegradation nor chemical dispersion process has almost no effect on the biomarker (m/z=231). The saturated methyl-branched fatty acids increased from 37.3%, to 49.4%, when M-25 was exposed with the N-4 crude oil. Similarly, the saturated methyl-branched fatty acids in the membrane of N3-2P increased from 20.25% to 44.1%, when exposed it with the N-4 crude oil.
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, Shandong 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, Shandong 266100, China; Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B3X5, Canada.
authors.forename: Yongrui
authors.initials: Y
authors.lastname: Pi
authors.affiliation: Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B3X5, Canada.
authors.forename: Bing
authors.initials: B
authors.lastname: Chen
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, Shandong 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, Shandong 266100, China. Electronic address: mtbao@ouc.edu.cn.
authors.forename: Mutai
authors.initials: M
authors.lastname: Bao
authors.affiliation: Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B3X5, Canada.
authors.forename: Fuqiang
authors.initials: F
authors.lastname: Fan
authors.affiliation: Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B3X5, Canada.
authors.forename: Qinhong
authors.initials: Q
authors.lastname: Cai
authors.affiliation: Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B3X5, Canada.
authors.forename: Lv
authors.initials: L
authors.lastname: Ze
authors.affiliation: Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B3X5, Canada.
authors.forename: Baiyu
authors.initials: B
authors.lastname: Zhang
mesh_terms: D001673:Biodegradation, Environmental; D006838:Hydrocarbons / Q000378:metabolism; D008055:Lipids / Q000737:chemistry; D010578:Petroleum / Q000378:metabolism*; D059392:Petroleum Pollution; D012240:Rhodococcus / Q000378:metabolism*; D013501:Surface-Active Agents / Q000378:metabolism*
chemical_list: D006838:Hydrocarbons; D008055:Lipids; D010578:Petroleum; D013501:Surface-Active Agents
keywords: Corexit 9500A; Four crude oil; Microbial degradation; PLFAs