Risk Assessment of Soils containing Non-Extractable Residues (NER)

J. Harmsen, D. Hennecke, K. Hund-Rinke, J. Lahr, J.W. Deneer

Research output: Contribution to conferencePosterProfessional


The focus of this study is to evaluate the formation of non-extractable
residues (NER) in soil after application of 14C- test compounds and to
assess whether NER are toxic. Residual activity is found to remain in
the soil after a ‘total’ extraction, which can be present as:
• The chemical itself associated with mineral and/or organic matter
• Transformation product;
• Microbial biomass;
• Carbonates.
At the moment NER is considered either as a potential long-term
problem or as a sustainable detoxification.
The goal of this study is:
• Develop an “extraction test” to assess the ecotoxicity of fractions
representing different degrees of bioavailability of the chemical;
• Provide a clear, mechanistically driven, definition of NER and to
confirm a lack of residual toxicity caused by NER.
Original languageEnglish
Publication statusPublished - 2016
EventSETAC Europe 26th Annual Meeting - Nantes, France
Duration: 22 May 201626 May 2016


ConferenceSETAC Europe 26th Annual Meeting


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