IBRACS Integrating Bioavailability in Risk Assessment of Contaminated Soils: opportunities and feasibilities. Final research report
2015
Kleja, Dan Berggren | Enell, Anja | Pettersson, Michael | Kumpiene, Jurate | Cornelissen, Gerard | Arp, Hans Peter | Dupuy, Joan | Leglize, Pierre | Ouvrard, Stéphanie | Sterckeman, Thibault | Smolders, Erik | Hamels, Fanny | Sonnet, Philippe | Swedish Geotechnical Institute (SGI) | Luleå University of Technology = Luleå Tekniska Universitet (LUT) | Stockholm University | Norwegian Geotechnical Institute (NGI) | Laboratoire Sols et Environnement (LSE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Université Catholique de Louvain = Catholic University of Louvain (UCL) | auto-saisine | Dan Berggren Kleja | Financement : SNOWMAN Network
In all countries in Europe, and probably the rest of the world, soil quality criteria (SQC) are based on totalconcentrations of contaminants. Indeed, the total concentration is an indicator of toxicity, but vastamounts of laboratory and field studies have shown that biological effects are not directly related to thetotal concentration. Instead, soil organisms respond to the fraction of contaminant that is biologicallyavailable. One way to deal with bioavalability is to use biological tests directly, with the aim to coverrelevant organisms and/or soil functions. Although being of high relevance, biological tests are generallycostly, time consuming, and complicated to perform and evaluate, which limits their use in practical riskassessments. In this respect, chemical methods offer an alternative, having the potential to be faster,cheaper and easier to commercialise. However, before any chemical bioavailability method can be usedin a risk assessment framework, a corresponding reference system based on ecotoxicity test data musthave been developed. In other words, we need a framework that relates the measured bioavailableconcentration to predefined ecosystem protection goals, e.g. protection of a certain fraction of species.To our knowledge, no such “official” framework including a bioavailablity methodology yet exist in anycountry. By introducing bioavailability in risk assessment frameworks, the accuracy of the assessment isexpected to increase, which are expected to save money and result in more sustainable remediationactions (...)
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