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

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): McLoughlin E, Rhodes AH, Owen SM, Semple KT

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Abstract The effects of monoterpenes on the degradation of (14)C-2,4-dichlorophenol (DCP) were investigated in soils collected from areas surrounding monoterpene and non-monoterpene-emitting vegetation. Indigenous microorganisms degraded (14)C-2,4-DCP to (14)CO(2), after 1d 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 (> or = 1 microg kg(-1)). Total mineralisation extents were similar between concentrations, but higher than the control and the 0.1 microg 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. This article was published in Environ Pollut and referenced in Journal of Bioremediation & Biodegradation

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