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Development of an Autochthonous Microbial Consortium for Enhanced Bioremediation of PAH-Contaminated Soil
Citation key WOS:000743830000001
Author Roszak, Marta and Jablonska, Joanna and Stachurska, Xymena and Dubrowska, Kamila and Kajdanowicz, Justyna and Golebiewska, Marta and Kiepas-Kokot, Anna and Osinska, Beata and Augustyniak, Adrian and Karakulska, Jolanta
Year 2021
DOI 10.3390/ijms222413469
Address ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
Journal INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22
Number 24
Month DEC
Publisher MDPI
Abstract The main objectives of this study were to isolate bacteria from soil chronically contaminated with polycyclic aromatic hydrocarbons (PAHs), develop an autochthonous microbial consortium, and evaluate its ability to degrade PAHs in their native contaminated soil. Strains with the best bioremediation potential were selected during the multi-stage isolation process. Moreover, to choose bacteria with the highest bioremediation potential, the presence of PAH-degrading genes (pahE) was confirmed and the following tests were performed: tolerance to heavy metals, antagonistic behavior, phytotoxicity, and antimicrobial susceptibility. In vitro degradation of hydrocarbons led to the reduction of the total PAH content by 93.5\% after the first day of incubation and by 99.22\% after the eighth day. Bioremediation experiment conducted in situ in the contaminated area resulted in the average reduction of the total PAH concentration by 33.3\% after 5 months and by over 72\% after 13 months, compared to the concentration recorded before the intervention. Therefore, this study implicates that the development of an autochthonous microbial consortium isolated from long-term PAH-contaminated soil has the potential to enhance the bioremediation process.
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