Temporal changes in the extractability, bioaccessibility and biodegradation of target hydrocarbons in soils from former refinery facilities

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dc.contributor.authorTowell, Marcie G.
dc.contributor.authorVázquez-Cuevas, Gabriela M.
dc.contributor.authorBellarby, Jessica
dc.contributor.authorPaton, Graeme I.
dc.contributor.authorPollard, Simon J. T.
dc.contributor.authorSemple, Kirk T.
dc.date.accessioned2021-04-28T11:31:01Z
dc.date.available2021-04-28T11:31:01Z
dc.date.issued2021-04-22
dc.description.abstractThis study investigated the extractability, bioaccessibility and biodegradation of 14C-phenanthrene and 14C-octacosane in two soils from former oil refinery facilities over 341 days. The impact of biostimulation and bioaugmentation treatments was also evaluated. At 0, 31, 62, 124 and 341 days, the loss and extractability (using dichloromethane, methanol:water and hydroxypropyl-β-cyclodextrin (HPCD)) of the 14C-hydrocarbons were measured. Further at each time point, the mineralisation of the 14C-hydrocarbons was measured respirometrically under the different conditions. In general, extractions with methanol: water and HPCD were similar for both hydrocarbons in the different treatments; however, these values were less that those measured with DCM. Overall, significantly higher (p ≤ 0.05) amounts of 14C-phenanthrene were lost, readily extracted and mineralised in the soils, with treatments having little impact upon the degradation of this hydrocarbon over 341 days. Conversely, bioaugmentation significantly increased the loss of 14C-octacosane residues from soils and sustained degradation after 31 days. Surprisingly, HPCD and methanol:water both under-predicted the extent to which the contaminants were degraded at each time point. Determining the likelihood of effective biodegradation by the stimulation of indigenous microorganisms or through bioaugmentation needs to be assessed by both chemical and biological measurements of bioaccessibility, rather than just by that which is totally extractable from soil. However, soils which have high loadings of organic matter and/or organic contaminants may prevent accurate assessment of contaminant bioaccessibility, as measured by HPCD.en_UK
dc.identifier.citationowell MG, Vázquez-Cuevas GM, Bellarby J, et al., (2021) Temporal changes in the extractability, bioaccessibility and biodegradation of target hydrocarbons in soils from former refinery facilities. International Biodeterioration and Biodegradation, Volume 160, May 2021, Article number 105227en_UK
dc.identifier.issn0964-8305
dc.identifier.urihttps://doi.org/10.1016/j.ibiod.2021.105227
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/16622
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectBiostimulationen_UK
dc.subjectBioaugmentationen_UK
dc.subjectMineralisationen_UK
dc.subjectBioaccessibilityen_UK
dc.subjectOctacosaneen_UK
dc.subjectPhenanthreneen_UK
dc.titleTemporal changes in the extractability, bioaccessibility and biodegradation of target hydrocarbons in soils from former refinery facilitiesen_UK
dc.typeArticleen_UK

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