Abstract
Abstract Fluorine abundances in sewage sludges from Bavarian municipal areas range between 180 and 3760 ppm on a dry base. Apparently, this wide range is due to size and importance of the industrial areas investigated. A preliminary approach shows the number of inhabitants to seemingly reflect the extent of industrial production. More knowledge of fluorine bonding within the sludges is necessary in order to understand behaviour and transport of this volatile element. Misleading results are gained when using ashing procedures to decompose samples with portions of biological materials. Therefore pyrobydrolytical techniques are proposed to avoid the undesired evaporation of volatile elements. For further understanding of fluorine abundance in sludges, input and output analyses of the total sewage systems are needed.
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