Formation and long-term fate of non-extractable residues in outdoor lysimeter studies

Autor:	Fritz Führ, Peter Burauel
Rok vydání:	2000
Předmět:	Total organic carbon Topsoil Pesticide residue Chemistry Health Toxicology and Mutagenesis Soil organic matter General Medicine Toxicology Pollution Soil contamination Humus Lysimeter Environmental chemistry Carbon-14
Zdroj:	Environmental Pollution. 108:45-52
ISSN:	0269-7491
Popis:	Long-term outdoor lysimeter studies using (14)C-labelled compounds allow the quantification of the 'non-extractable residue fraction'. More than 20 lysimeter studies under realistic environmental conditions showed that more than 80% of residual carbon of the molecule is retained in the topsoil layer even after several years. Generally, 50-90% of this residual radiocarbon is regarded as 'soil bound residue'. Microbial biomass is present in large quantities in topsoil and continuously influences chemical and biochemical alteration of pesticide molecules that may interact directly with the total soil organic matter. Labelling techniques using radioactive isotopes like (14)C have been used to characterize these residues in the humus matrix. Our studies have been directed to the investigation of extractability and/or bioavailability of these residues in long-term investigations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7efff9be25df6489c5f8fd5c6bf30d2c https://doi.org/10.1016/s0269-7491(99)00200-6 Zobrazit plný text záznamu Full Text from ScienceDirect