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Biogenic volatile organic compounds as a potential stimulator for organic contaminant degradation by soil microorganisms.

McLoughlin, Emma and Rhodes, Angela and Owen, Susan M. and Semple, Kirk T. (2009) Biogenic volatile organic compounds as a potential stimulator for organic contaminant degradation by soil microorganisms. Environmental Pollution, 157 (1). pp. 86-94. ISSN 0269-7491

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Abstract

The effects of monoterpenes on the degradation of 14C-2,4-dichlorophenol (DCP) were investigated in soils collected from areas surrounding monoterpene and non-monoterpene-emitting vegetation. Indigenous microorganisms degraded 14C-2,4-DCP to 14CO2, after 1 d contact time. Degradation was enhanced by prior exposure of the soils to 2,4-DCP for 32 d, increasing extents of mineralisation up to 60%. Monoterpene amendments further enhanced 2,4-DCP degradation, but only following pre-exposure to both 2,4-DCP and monoterpene, with total 2,4-DCP mineralisation extents of up to 71%. Degradation was greatest at the higher monoterpene concentrations (≥1 μg kg−1). Total mineralisation extents were similar between concentrations, but higher than the control and the 0.1 μg kg−1 amendment, indicating that increases in monoterpene concentration has a diminishing enhancing effect. We suggest that monoterpenes can stimulate the biodegradation of 2,4-DCP by indigenous soil microorganisms and that monoterpene amendment in soils is an effective strategy for removing organic contaminants. A amendment of soils with monoterpenes may induce organic contaminant degradation by indigenous soil microorganisms.

Item Type: Article
Journal or Publication Title: Environmental Pollution
Uncontrolled Keywords: Mineralisation ; Biodegradability ; 2 ; 4-Dichlorophenol ; Monoterpenes ; α-Pinene ; Limonene ; Ageing soils
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 30735
Deposited By: Mr Richard Ingham
Deposited On: 02 Dec 2009 14:58
Refereed?: Yes
Published?: Published
Last Modified: 06 Sep 2013 19:41
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/30735

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