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Assessing biodegradation potential of PAHs in complex multi-contaminant matrices |
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| Authors: | Hickman Zachary A Swindell Annika L Allan Ian J Rhodes Angela H Hare Rina Semple Kirk T Reid Brian J |
| Institution: | a School of Environmental Sciences, UEA, Norwich, NR9 4QR, UK b Lancaster Environment Centre, Environmental Science Department and Centre for Chemicals Management, Lancaster University, Lancaster, LA1 4QR, UK c Alcontrol Laboratories, Chester, CH5 3US, UK |
| Abstract: | 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 ∑PAH (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-β-cyclodextrin (HPCD) extraction. |
| Keywords: | HPCD Biodegradation PAH MGP Bioaccessibility |
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