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Chemical and bioanalytical characterisation of PAHs in risk assessment of remediated PAH-contaminated soils
Örebro University, School of Science and Technology. (Man-Technology-Environment Research Centre (MTM))
Örebro University, School of Science and Technology. (Man-Technology-Environment Research Centre (MTM))ORCID iD: 0000-0003-4128-8226
(Man-Technology-Environment Research Centre (MTM))
Örebro University, School of Science and Technology. (Man-Technology-Environment Research Centre (MTM))ORCID iD: 0000-0001-6217-8857
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(English)Manuscript (preprint) (Other academic)
Abstract [en]

Abstract Polycyclic aromatic hydrocarbons (PAHs) are common contaminants in soil at former industrial areas; and in Sweden, some of the most contaminated sites are being remediated. Generic guideline values for soil use after so-called successful remediation actions of PAHcontaminated soil are based on the 16 EPA priority pollutants, which only constitute a small part of the complex cocktail of toxicants in many contaminated soils. The aim of the study was to elucidate if the actual toxicological risks of soil samples from successful remediation projects could be reflected by chemical determination of these PAHs. We compared chemical analysis (GC-MS) and bioassay analysis (H4IIE-luc) of a number of remediated PAH-contaminated soils. The H4IIE-luc bioassay is an aryl hydrocarbon (Ah) receptor-based assay that detects compounds that activate the Ah receptor, one important mechanism for PAH toxicity. Comparison of the results showed that the bioassay-determined toxicity in the remediated soil samples could only be explained to a minor extent by the concentrations of the 16 priority PAHs. The current risk assessment method for PAH-contaminated soil in use in Sweden along with other countries, based on chemical analysis of selected PAHs, is missing toxicologically relevant PAHs and other similar substances. It is therefore reasonable to include bioassays in risk assessment and in the classification of remediated PAH-contaminated soils. This could minimise environmental and human health risks and enable greater safety in subsequent reuse of remediated soils. 

Keywords [en]
PAH, Remediation, Bioassay, Bioavailability, Toxicity, Risk assessment
National Category
Chemical Sciences
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-32664OAI: oai:DiVA.org:oru-32664DiVA, id: diva2:676678
Available from: 2013-12-06 Created: 2013-12-06 Last updated: 2017-10-17Bibliographically approved

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Larsson, MariaHagberg, JessikaRotander, Annavan Bavel, BertEngwall, Magnus

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