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

Okere, Uchechukwu V. and Cabrerizo, Ana and Dachs, Jordi and Ogbonnaya, Uchenna O. and Jones, Kevin C. and Semple, Kirk T. (2017) Effects of pre-exposure on the indigenous biodegradation of 14C-phenanthrene in Antarctic soils. International Biodeterioration and Biodegradation, 125. pp. 189-199. ISSN 0964-8305

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
International Biodeterioration and Biodegradation
Additional Information:
This is the author’s version of a work that was accepted for publication in International Biodeterioration & Biodegradation. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Biodeterioration & Biodegradation, 125, 2017 DOI: 10.1016/j.ibiod.2017.09.013
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2400/2404
Subjects:
ID Code:
88018
Deposited By:
Deposited On:
20 Nov 2017 21:30
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Sep 2020 03:46