Quinoline aerobic degradation

Benzothiophene is isoelectronic with naphthalene, dibenzothiophene with anthracene, and benzothiazole with quinoline, and this is reflected in their aerobic degradation that is initiated by dioxygenation. The diversity of pathways for the degradation of dibenzothiophene is illustrated by the following examples ... 

The systematic work carried out by Fetzner group with enzymatic catalysis resulted in the identification of four pathways of aerobic degradation of quinoline (and its derivatives) [326], shown in Fig. 23. The four pathways are named on the basis of the metabolic intermediates identified in the respective pathways, some steps and reactions have been considered in previously described pathways, but are included here to show the comprehensive nature of this work. 

Sugaya et al. demonstrated the activity of Comamonas sp. TKV3-2-1 for quinoline removal. This aerobic strain utilizes quinoline as carbon and nitrogen source and degrades it to water soluble products [319], No enzymes were identified in this study. 

Shukla [323] isolated an aerobic Gram-negative motile bacterium from sewage which was identified as a P. stutzeri and was found to degrade quinoline by a different pathway, yielding denitrogenated products. 

Blaschke, M. Kretzer, A. Schafer, C., et al., Molybdenum-dependent Degradation of Quinoline by Pseudomonas Putida Chin lk and other Aerobic Bacteria. Arch. Microbio, 1991. 155 pp. 164-69. 

Coal tar creosote components are slowly released from treated wood products by oil exudation, rainwater leaching, and by volatilization of the lighter fractions (Henningsson 1983). USDA (1980) reported that the major components of creosote were not detected in soil samples taken to a depth of 6 inches within 2-24 inches from treated poles, presumably as a result of biotransformation of mobilized components by soil microorganisms. Creosote components released to soils in waste water effluents have been found to be biotransformed by soil microbes under aerobic conditions (Middleton 1984). Bacteria of the genus Pseudomonas isolated from a creosote-contaminated waste site have been reported to degrade creosote-derived quinoline (Bennett et al. 1985). Acclimation to creosote phenolic constituents by soil microorganisms has also been demonstrated (Smith et al. 1985). 

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