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(38-20) Comparison of soil and sediment ecotoxicity data and test methods. Nagel, Roland1, Fiedler, Sabine1, Gildemeister, Thomas*,1, Herrchen, Monika2, Hund-Rinke, Kerstin2, Metag, Nicole1,2, 1 Dresden University of Technology, Dresden, Germany2 Fraunhofer Institute for Molecular Biology and Applied Ecology, Schmallenberg, Germany ABSTRACT- The quality, validity, representiveness and size of data collections of existing ecotoxicity data for chemicals varies to a high extend between the environmental compartments water, sediment and soil. In order to reduce the imbalance of existing data and to be able to proceed with profound and comprehensive risk analyses and evaluation procedures for the environmental compartments soil, water and sediment a successive and comprehensive approach is being developed in this project. The main emphasis is laid on seven organic chemicals and one metal compound (cadmiumchloride) which persist and bioaccumulate. 4,4-DDT, benzo-[a]-pyrene, pentachlorophenol, 2,4-dichlorophenol, trinitrotoluene were selected to cover a relatively wide range of lipophilicity. 3,4-dichloroaniline was selected for its covalent binding characteristics to organic matter. Tributyltinchloride was chosen as an organometallic compound and due to the high acutal environmental relevance. Because of missing soil and sediment toxicity data for these chemicals gaps are being filled experimentally. Sediment toxicity reproduction tests are being conducted using Vallisneria americana, Hyalella azteca, Chironomus riparius, and Lumbriculus variegatus. Three spiked soils are being tested for their toxicity on reproduction of Eisenia fetida, Enchytraeus albidus, Folsomia candida. Effect parameters for microorganisms within soils are respiration and nitrification. For the plants Avena sativa and Brassica rapa growth and germination are determined. First results in sediment and soil toxicity testing for cadmiumchloride, 2,4-dichlorophenol, pentachlorophenol, benzo-[a]-pyrene and tributyltinchloride are prestented on this poster. Key words: sediment toxicity testing, soil toxicity testing, correlation, extrapolation |
