Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Biogenic volatile organic compounds as a potential stimulator for organic contaminant degradation by soil microorganisms.
AU - McLoughlin, Emma
AU - Rhodes, Angela
AU - Owen, Susan M.
AU - Semple, Kirk T.
PY - 2009/1
Y1 - 2009/1
N2 - 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.
AB - 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.
KW - Mineralisation
KW - Biodegradability
KW - 2
KW - 4-Dichlorophenol
KW - Monoterpenes
KW - α-Pinene
KW - Limonene
KW - Ageing soils
U2 - 10.1016/j.envpol.2008.07.029
DO - 10.1016/j.envpol.2008.07.029
M3 - Journal article
VL - 157
SP - 86
EP - 94
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
IS - 1
ER -