Natural attenuation potential of polychlorinated biphenyl-polluted marine sediments

• Autorzy: Aldhafiri S. , Mahmoud H. , Al-Sarawi M. , Ismail W.A.
• Języki publikacji: EN

Abstrakty

EN

The marine environment in Kuwait is polluted with various hazardous chemicals of industrial origin. These include petroleum hydrocarbons, halogenated compounds and heavy metals. Bioremediation with dedicated microorganisms can be effectively applied for reclamation of the polluted marine sediments. However, information on the autochthonous microbes and their ecophysiology is largely lacking. We analyzed sediments from Shuwaikh harbor to detect polychlorinated biphenyls (PCBs) and total petroleum hydrocarbons (TPHs). Then we adopted both culture-dependent and culture-independent (PCR-DGGE) approaches to identify bacterial inhabitants of the polluted marine sediments from Shuwaikh harbor. The chemical analysis revealed spatial variation among the sampling stations in terms of total amount of PCBs, TPHs and the PCB congener fingerprints. Moreover, in all analyzed sediments, the medium-chlorine PCB congeners were more abundant than the low-chlorine and high-chlorine counterparts. PCR-DGGE showed the presence of members of the Proteobacteria, Spirochaetes, Firmicutes and Bacteroidetes in the analyzed sediments. However, Chloroflexi-related bacteria dominated the detected bacterial community. We also enriched a biphenyl-utilizing mixed culture using the W2 station sediment as an inoculum in chemically defined medium using biphenyl as a sole carbon and energy source. The enriched mixed culture consisted mainly of the Firmicute Paenibacillus spp. Sequences of genes encoding putative aromatic ring-hydroxylating dioxygenases were detected in sediments from most sampling stations and the enriched mixed culture. The results suggest the potential of bioremediation as a means for natural attenuation of Shuwaikh harbor sediments polluted with PCBs and TPHs.

• Wydawca: -
• Czasopismo: Polish Journal of Microbiology
• Rocznik: 2018
• Tom: 67
• Numer: 1
• Opis fizyczny: p.37-48,fig.,ref.

Twórcy

autor

Aldhafiri S.

• Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Kingdom of Bahrain

autor

Mahmoud H.

• Department of Biological Sciences, College of Science, Kuwait University, Kuwait

autor

Al-Sarawi M.

• Department of Earth and Environmental Sciences, College of Science, Kuwait University, Kuwait

autor

Ismail W.A.

• Environmental Biotechnology Program, Life Sciences Department, College of Graduate Studies, Arabian Gulf University, Manama, Kingdom of Bahrain

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Identyfikatory

DOI

10.5604/01.3001.0011.6140