Recently, we put out a paper on an ecotoxicological investigation of sediments from an oxbow lake of the River Rhine. What looks just like another research paper about a study of contaminated sediments holds an important finding about standard sediment assessment: it might fail.
We tested the samples using a comprehensive bioassay battery that goes far beyond the regulatory requirements. Besides the commonly employed test on immobilisation of Daphnia magna, we used assays to reveal estrogenicity, teratogenicity, embryotoxicity and cytotoxicity. Surprisingly, all tests gave clear effects of the sediments, except for the standard test with daphnids.
So, are sediments a risk? Read our discussion and conclusions of this important topic in our paper published in the Journal of Soils and Sediments.
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