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

McLoughlin, Emma; Rhodes, Angela H.; Owen, Susan M.; Semple, Kirk T.. 2009 Biogenic volatile organic compounds as a potential stimulator for organic contaminant degradation by soil microorganisms. Environmental Pollution, 157 (1). 86-94. 10.1016/j.envpol.2008.07.029

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Abstract/Summary

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 mineralization extents 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.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2008.07.029
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry
CEH Sections: Billett
ISSN: 0269-7491
Additional Keywords: mineralisation, biodegradability, 2,4-dichlorophenol, monoterpenes, limonene, ageing soils
NORA Subject Terms: Ecology and Environment
Date made live: 19 Jan 2009 10:21
URI: http://nora.nerc.ac.uk/id/eprint/5337

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