Beitrag zur Charakterisierung und Identifizierung organischer Stoffe niederer molarer Massen in biologischen Kläranlagenabläufen |
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Authors: | W Elsßer E Gilbert S H Eberle |
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Institution: | W. Elsäßer,E. Gilbert,S. H. Eberle |
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Abstract: | Contribution to the characterization and identification of low molecular weight organic substances in biologically treated effluent. In a review it is shown that by determination of sum parameters only 25% of low molecular weight substances <1000 Dalton in biologically treated effluent can be divided into different classes of compounds. A method is described to separate the low molecular weight compounds (freeze concentration, electrodialysis, vacuum evaporation, freeze drying) in order to identify single compounds. In a first GC-MS analysis 87 compounds, among them a high proportion of substances with hetero atoms, could be identified. Their concentrations lie between 0,1 and 3 μg/1. Only 3% of the low molecular weight fraction related to the DOC value is covered by the identified substances. Therefore it can be assumed, that a broad variety of low molecular weight compounds in very low concentrations is present in the effluent of biological treatment plants. |
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Keywords: | Klä ranlagenablauf niedermolekulare Fraktion organische Verbindungen GC-MS-Kopplung Isolierung Identifizierung |
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