Erarbeitung fachlicher Grundlagen zur untergesetzlichen Regelungen im Bodenschutz: Schwermetalltransfer Boden - Pflanze. Ergebnisse der Auswertungen hinsichtlich der Koenigswasser- und Ammoniumnitrat-Extraktion anhand der Datenbank TRANSFER

In co-operation with the ad-hoc-group 'Heavy metal transfer soil/plant' of the study group 'Soil protection' the transfer behaviour of heavy metals from soil to well-chosen food plants and forage plants was analysed under the aspects of phytotoxicity, food plant quality and forage plant quality based on the data of the data bank TRANSFER. Aim of this work was the derivation of a soil standard value concept including different threshold values by the ad-hoc-group who developed on this basis a concept for hazard assessment concerning adverse effects of soil contaminations to plants. Only extractions with aqua regia and ammoniumnitrate from outdoor investigations on cultivated sites were taken into consideration for calculating regression statistics. With the help of these statistics the relationship between heavy metals in soil and heavy metals in plants can be described, which give evidence about the probability of heavy metal concentrations in plants depending on heavy metal concentrations in soil. The following contigency tables show the distribution of heavy metal concentrations in soil and in plants for different concentration levels on the basis of maximum permissible heavy metal contents in plants and on the basis of recommendations of the ad-hoc-group concerning a soil standard value concept with different threshold values. (orig.)SIGLEAvailable from TIB Hannover: RN 8422(1999,11) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Bonn (Germany)DEGerman