Abstract
In the European Waste List (2000/532/EC as amended) the ash of municipal waste incineration is defined as a so called mirror entry. This waste can be classified as hazardous or non-hazardous depending on the content of hazardous substances and other risk properties. For the assignment of waste in mirror entries, 14 criteria are defined. One of the criteria is H14 "ecotoxic". In the presented study, the ecotoxicological potential of 12 ashes from different incineration plants has been assessed using biological test systems. The test battery included aquatic tests with eluates (algae, daphnids, and luminescent bacteria) and terrestrial tests with solid waste (plants, earthworms and bacteria). The test results revealed a clear ecotoxicological hazard potential for some of the MWI ashes. Despite the fact that fresh ashes were several times more toxic than aged ashes both groups did not differ consistently in terms of toxicity. The results show also that there is no correlation between the biological effects and the analyzed chemical compounds of the ash samples.
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