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Initial microbial degradation of polycyclic aromatic hydrocarbons

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2016
1935.pdf (336.9Kb)
Authors
Milić, Jelena
Avdalović, Jelena
Šolević Knudsen, Tatjana
Gojgić-Cvijović, Gordana
Jednak, Tanja
Vrvić, Miroslav
Article (Published version)
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Abstract
The group of polycyclic aromatic hydrocarbons (PAHs) are very hazardous environmental pollutants because of their mutagenic, carcinogenic and toxic effects on living systems. The aim of this study was to examine and compare the ability and efficiency of selected bacterial isolates obtained from oil-con-taminated areas to biodegrade PAHs. The potential of the bacteria to biodeg-rade various aromatic hydrocarbons was assessed using the 2,6-dichlorophe-nolindophenol assay. Further biodegradation of PAHs was monitored by gra-vimetric and gas-chromatographic analysis. Among the eight bacterial isolates, identified on the basis of 16S rDNA sequences, two isolates, Planomicrobium sp. RNP01 and Rhodococcus sp. RNP05, had the ability to grow on and utilize almost all examined hydrocarbons. Those isolates were further examined for biodegradation of phenanthrene and pyrene, as single substrates, and as a mixture, in vitro for ten days. After three days, both isolates degraded a significant amount... phenanthrene, which has a simpler chemical structure than pyrene. Planomicrobium sp. RNP01 commenced biodegradation of pyrene in the PAH mixture only after it had almost completely degraded phenanthrene. The isolated and characterized bacteria, Planomicrobium sp. RNP01 and Rhodococcus sp. RNP05, have shown high bioremediation potential and are likely candidates to be used for degradation of highly toxic PAHs in contaminated areas.

Keywords:
PAH biodegradation / Planomicrobium / Rhodococcus / phenanthrene / pyrene
Source:
Chemical Industry and Chemical Engineering Quarterly / CICEQ, 2016, 22, 3, 293-299
Publisher:
  • Association of the Chemical Engineers of Serbia
Projects:
  • Simultaneous Bioremediation and Soilification of Degraded Areas to Preserve Natural Resources of Biologically Active Substances, and Development and Production of Biomaterials and Dietetic Products (RS-43004)

DOI: 10.2298/CICEQ150606043M

ISSN: 1451-9372

WoS: 000384728000007

Scopus: 2-s2.0-84987817182
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1937
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