title: [Denitrogenation of petroleum by a Pseudomonas sp].
abstract: Biodenitrogenation of petroleum oil was investigated by a previously isolated carbazole-degrader Pseudomonas sp. XLDN4-9. In a tetradecane-aqueous phase system, biodegradation of carbazole was enhanced by the presence of n-tetradecane. And strain XLDN4-9 was capable of absorbing 95.2% of 2 g/L carbazole dissolved in diesel within 15 hours. Significant denitrogentation of crude oil, diesel and lubricanting oil was detected by strain XLDN4-9. Removal of carbazole, methylcarbazole, and dimethylcarbazole in diesel was confirmed by using GC-MS. After 3 days, 99% of carbazole and 15% of dimethyl carbazole was degraded. And the removal rate of 1-, 2-, 3-, and 4-methyl carbazole was determined to be 63.4%, 87.6%, 78.4%, and 66.5% respectively.
authors.affiliation: State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: Xu
authors.forename: Quan
authors.initials: Q
authors.lastname: Shi
mesh_terms: D001673:Biodegradation, Environmental; D002227:Carbazoles / Q000737:chemistry / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D010578:Petroleum / Q000378:metabolism*; D011549:Pseudomonas / Q000145:classification / Q000378:metabolism*
chemical_list: D002227:Carbazoles; D010578:Petroleum; C041514:carbazole