Zum Einfluß des gelösten organischen Kohlenstoffs (DOC) auf das Mobilitätsverhalten einiger Pestizide

Interaction of Dissolved Organic Carbon (DOC) with some Pesticides in Aqueous Systems. Several independent methods (batch sorption studies, chromatography) were used to study interactions of natural organic matter with two pesticides (Terbutylazine, Pendimethaline). After 24 hrs contact time, significant amounts of pesticides were (in part irreversibly) associated with the colloidal and high molecular weight fraction. The interactions were observed for soil organic matter and groundwater-DOC. It is assumed that the mobility of pesticides in natural systems is strongly influenced by interactions of this kind. The hypothesis is supported by chromatographic measurements of DOC with ¹⁴C-labeled Pendimethaline in lysimeter leachates.