Insights into the biodegradation of weathered hydrocarbons in contaminated soils by bioaugmentation and nutrient stimulation

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dc.contributor.authorJiang, Ying
dc.contributor.authorBrassington, Kirsty J.
dc.contributor.authorPrpich, George
dc.contributor.authorPaton, Graeme
dc.contributor.authorSemple, Kirk T.
dc.contributor.authorPollard, Simon J. T.
dc.contributor.authorCoulon, Frederic
dc.date.accessioned2016-07-19T11:48:29Z
dc.date.available2016-07-19T11:48:29Z
dc.date.issued2016-07-18
dc.description.abstractThe potential for biotransformation of weathered hydrocarbon residues in soils collected from two commercial oil refinery sites (Soil A and B) was studied in microcosm experiments. Soil A has previously been subjected to on-site bioremediation and it was believed that no further degradation was possible while soil B has not been subjected to any treatment. A number of amendment strategies including bioaugmentation with hydrocarbon degrader, biostimulation with nutrients and soil grinding, were applied to the microcosms as putative biodegradation improvement strategies. The hydrocarbon concentrations in each amendment group were monitored throughout 112 days incubation. Microcosms treated with biostimulation (BS) and biostimulation/bioaugmentation (BS + BA) showed the most significant reductions in the aliphatic and aromatic hydrocarbon fractions. However, soil grinding was shown to reduce the effectiveness of a nutrient treatment on the extent of biotransformation by up to 25% and 20% for the aliphatic and aromatic hydrocarbon fractions, respectively. This is likely due to the disruption to the indigenous microbial community in the soil caused by grinding. Further, ecotoxicological responses (mustard seed germination and Microtox assays) showed that a reduction of total petroleum hydrocarbon (TPH) concentration in soil was not directly correlable to reduction in toxicity; thus monitoring TPH alone is not sufficient for assessing the environmental risk of a contaminated site after remediation.en_UK
dc.identifier.citationYing Jiang, Kirsty J. Brassington, George Prpich, Graeme I. Paton, Kirk T. Semple, Simon J.T. Pollard, Frédéric Coulon, Insights into the biodegradation of weathered hydrocarbons in contaminated soils by bioaugmentation and nutrient stimulation, Chemosphere, Volume 161, October 2016, pp300-307en_UK
dc.identifier.cris14838816
dc.identifier.issn0045-6535
dc.identifier.urihttp://dx.doi.org/10.1016/j.chemosphere.2016.07.032
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10138
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectSoil contaminationen_UK
dc.subjectBioremediationen_UK
dc.subjectWeathered petroleum hydrocarbonen_UK
dc.subjectBioaugmentationen_UK
dc.subjectBiostimulationen_UK
dc.titleInsights into the biodegradation of weathered hydrocarbons in contaminated soils by bioaugmentation and nutrient stimulationen_UK
dc.typeArticleen_UK

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