A Review of Pyrene Bioremediation Using Mycobacterium Strains in a Different Matrix

Polycyclic aromatic hydrocarbons are compounds with 2 or more benzene rings, and 16 of them have been classified as priority pollutants. Among them, pyrene has found in higher concentrations than recommended, posing a threat to the ecosystem. Many bacterial strains identified degraders. Most belong Gram-positive such Mycobacterium sp. Rhodococcus These were enriched isolated from several sites contaminated petroleum products, fuel stations. The bioremediation via is main objective this review. scattered data on degradation efficiency, formation metabolites, bio-toxicity its proposed pathways collected work. study revealed that most capable degrading efficiently. metabolites 4,5-dihydroxy pyrene, phenanthrene-4,5-dicarboxylate, phthalic acid, pyrene-4,5-dihydrodiol. Some showed positive results for Ames mutagenicity prediction test, 1,2-phenanthrenedicarboxylic 1-hydroxypyrene, 4,5-dihydropyrene, 4-phenanthrene-carboxylic 3,4-dihydroxyphenanthrene, monohydroxy 9,10-phenanthrenequinone. However, 4-phenanthrol experimental tests. This may contribute enhancing different matrix.