Effects of pre-exposure on the indigenous biodegradation of 14 C-phenanthrene in Antarctic soils.

Journal article


Okere, Uchechukwu V., Cabrerizo, Ana, Dachs, Jordi, Ogbonnaya, Uchenna O., Jones, Kevin C. and Semple, Kirk T. 2017. Effects of pre-exposure on the indigenous biodegradation of 14 C-phenanthrene in Antarctic soils. International Biodeterioration & Biodegradation. https://doi.org/10.1016/j.ibiod.2017.09.013
AuthorsOkere, Uchechukwu V., Cabrerizo, Ana, Dachs, Jordi, Ogbonnaya, Uchenna O., Jones, Kevin C. and Semple, Kirk T.
Abstract

The aim of this study was to investigate the biodegradation of phenanthrene in five Antarctic soils over 150 days at various temperatures and under slurry conditions. The development of catabolic activity was measured over time (1, 30, 60, 150 days) by the addition of 14C-phenanthrene and measuring changes in the lag phases, rates and extents of 14C-phenanthrene degradation. As the temperature increased (4 °C, 12 °C, 22 °C, 22 °C slurry), the highest extents of 14C-phenanthrene mineralisation increased significantly (0.46%, 12.21%, 24.82%, 60.81%), respectively. This was due to changes in the water availability and 14C-phenanthrene dissolution in aqueous phase, thus enhancing bioaccessibility of the contaminant to indigenous microorganisms within the soil. High catabolic activities can develop in Antarctic soils where appropriate conditions are ensured. However, further studies are however needed to explore the changes in microbial community structure that occur at different incubation temperatures.

KeywordsAntarctica; Pre-exposure; Biodegradation
Year2017
JournalInternational Biodeterioration & Biodegradation
PublisherElsevier
ISSN09648305
Digital Object Identifier (DOI)https://doi.org/10.1016/j.ibiod.2017.09.013
Web address (URL)http://hdl.handle.net/10545/622082
hdl:10545/622082
Publication dates04 Oct 2017
Publication process dates
Deposited26 Jan 2018, 16:06
Accepted10 Sep 2017
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Archived with thanks to International Biodeterioration & Biodegradation

ContributorsLancaster University, IDAEA-CSIC Jordi Girona and Federal University Oye-Ekit
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