Assessing biodegradation potential of PAHs in complex multi-contaminant matrices.
This study sought to extend validation of a cyclodextrin based extraction method for the assessment of PAH-biodegradation potential to complex multi-contaminant matrices. To this end, four reference materials (RMs) were produced by blending, in different proportions, soils impacted with diesel, lubricating oil and spent oxide. These reference materials had modest summation operatorPAH (16 US EPA) concentrations that ranged from 5.6+/-0.5 to 44.4+/-4.5 mg kg(-1). However, extractable petroleum hydrocarbon (EPH) concentrations were comparatively high (up to 2520+/-204 mg kg(-1)). To complement these RMs, two further soils from a municipal gas plant (MGP) with highly elevated concentration of PAHs ranging from 877+/-52 to 2620+/-344 mg kg(-1) were also tested. Results showed, regardless of matrix complexity, that PAH biodegradation within the four RM substrates, and two MGP soils correlated well with biodegradation predicted by hydroxypropyl-beta-cyclodextrin (HPCD) extraction.
School of Environmental Sciences, UEA, Norwich NR94QR, UK.
Zachary A
ZA
Hickman
Annika L
AL
Swindell
Ian J
IJ
Allan
Angela H
AH
Rhodes
Rina
R
Hare
Kirk T
KT
Semple
Brian J
BJ
Reid
D000073738:2-Hydroxypropyl-beta-cyclodextrin; D001673:Biodegradation, Environmental; D004784:Environmental Monitoring / Q000379:methods; D007220:Industrial Waste; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D052616:Solid Phase Extraction; D018505:Waste Management / Q000379:methods*; D047392:beta-Cyclodextrins
D007220:Industrial Waste; D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants; D047392:beta-Cyclodextrins; D000073738:2-Hydroxypropyl-beta-cyclodextrin