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The development of phenanthrene catabolism in soil amended with transformer oil.

Lee, Philip H. and Doick, Keiron J. and Semple, Kirk T. (2003) The development of phenanthrene catabolism in soil amended with transformer oil. FEMS Microbiology Letters, 228 (2). pp. 217-223. ISSN 0378-1097

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Abstract

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants frequently associated with light non-aqueous-phase liquids (LNAPLs) in soil. Microbial degradation comprises a major loss process for PAHs in the environment. Various laboratory studies, using known degraders, have shown reduced or enhanced mineralisation of PAHs when dissolved in different LNAPLs. Effects due to the presence of LNAPLs on indigenous micro-organisms, however, are not fully understood. A pristine pasture soil was spiked with [C-14]phenanthrene and transformer oil to 0, 0.01 and 0.1%, and incubated for 180 days. The catabolic potential of the soil towards phenanthrene was assessed periodically during ageing. The extent of the lag phase (prior to > 5% mineralisation), maximum rates and overall extents of mineralisation observed during the course of a 14-day bioassay appeared to be dependent upon phenanthrene concentration, the presence of transformer oil, and soil-contaminant contact time. Putatively, transformer oil enhanced acclimation and facilitated the development of measurable catabolic activity towards phenanthrene in a previously uncontaminated pasture soil. Exact mechanisms for the observed enhancement, longer-term fate/degradation of the oil and residual phenanthrene, and effects of the presence of the oil on the indigenous microbes over extended time frames warrant further investigation. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.}

Item Type: Article
Journal or Publication Title: FEMS Microbiology Letters
Uncontrolled Keywords: mineralization ; light non-aqueous-phase liquid ; polycyclic aromatic hydrocarbon ; indigenous degradation
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 18560
Deposited By: Prof Kirk T. Semple
Deposited On: 27 Oct 2008 09:33
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 16:18
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18560

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