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Biodegradation of 2-methylquinoline by Klebsiella pneumoniae TJ-A isolated from acclimated activated sludge
Bacterial strain Klebsiella pneumoniae TJ-A, which was capable of utilizing 2-methylquinoline as the sole carbon and energy source, was isolated from acclimated activated sludge under aerobic conditions. Effects of temperature and initial pH on the biodegradation of 2-methylquinoline by Klebsiella pneumoniae TJ-A were investigated. The optimal temperature and initial pH were 30°C and 7.5, respectively. The degradation process was well described by the Haldane model. Then 1, 2, 3, 4-tetrahydro-2-methylquinoline, 4-ethyl-benzenamine and N-butyl-benzenamine were metabolites detected during the degradation of 2-methylquinoline. 2-Methylquinoline was initially hydroxylated at C-4 to form 2-methyl-4-hydroxy-quinoline, and then to form 2-methyl-4-quinolinol as a result of tautomerism. Hydrogenation of heterocyclic ring between the position 2 and 3 produced 2, 3-dihydro-2-methyl-4-quinolinol. The carbon-carbon bond between the position 2 and 3 in the heterocyclic ring cleaved and then formed 2-ethyl-N-ethyl-benzenamine. Tautomerism might result in the formation of N-butyl-benzenamine. The 4-ethyl-benzenamine was produced as a result of losing one ethyl group from N-butyl-benzenamine. The bacterial strain Klebsiella pneumoniae TJ-A was the priority species in the aerobic activated sludge responsible for the degradation of 2-methylquinoline.
Biodegradation of 2-methylquinoline by Klebsiella pneumoniae TJ-A isolated from acclimated activated sludge
Bacterial strain Klebsiella pneumoniae TJ-A, which was capable of utilizing 2-methylquinoline as the sole carbon and energy source, was isolated from acclimated activated sludge under aerobic conditions. Effects of temperature and initial pH on the biodegradation of 2-methylquinoline by Klebsiella pneumoniae TJ-A were investigated. The optimal temperature and initial pH were 30°C and 7.5, respectively. The degradation process was well described by the Haldane model. Then 1, 2, 3, 4-tetrahydro-2-methylquinoline, 4-ethyl-benzenamine and N-butyl-benzenamine were metabolites detected during the degradation of 2-methylquinoline. 2-Methylquinoline was initially hydroxylated at C-4 to form 2-methyl-4-hydroxy-quinoline, and then to form 2-methyl-4-quinolinol as a result of tautomerism. Hydrogenation of heterocyclic ring between the position 2 and 3 produced 2, 3-dihydro-2-methyl-4-quinolinol. The carbon-carbon bond between the position 2 and 3 in the heterocyclic ring cleaved and then formed 2-ethyl-N-ethyl-benzenamine. Tautomerism might result in the formation of N-butyl-benzenamine. The 4-ethyl-benzenamine was produced as a result of losing one ethyl group from N-butyl-benzenamine. The bacterial strain Klebsiella pneumoniae TJ-A was the priority species in the aerobic activated sludge responsible for the degradation of 2-methylquinoline.
Biodegradation of 2-methylquinoline by Klebsiella pneumoniae TJ-A isolated from acclimated activated sludge
Wang, Lin (Autor:in) / Li, Yongmei (Autor:in) / Duan, Jingyuan (Autor:in)
Journal of Environmental Science and Health, Part A ; 49 ; 27-38
02.01.2014
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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