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Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
Ecotoxicological characterisation of 12 incineration ashes using 6 laboratory tests
1ECT Oekotoxikologie GmbH, Boettgerstr. 2-14, D-65439 Flörsheim, Germany. J-Roembke@ect.de
Waste Management (New York, N.Y.)
|May 16, 2009
Summary
Municipal waste incineration (MWI) ash can be hazardous. This study assessed MWI ash ecotoxicity using biological tests, finding some ashes pose environmental risks. Chemical analysis did not correlate with observed biological effects.
Area of Science:
- Environmental Science
- Ecotoxicology
- Waste Management
Background:
- Municipal waste incineration (MWI) ash is a 'mirror entry' in the European Waste List, classified as hazardous or non-hazardous based on risk properties.
- The H14 'ecotoxic' criterion is crucial for classifying MWI ash.
- Assessing the ecotoxicological potential of MWI ash is vital for environmental risk management.
Purpose of the Study:
- To evaluate the ecotoxicological hazard of MWI ashes using a comprehensive battery of biological tests.
- To compare the toxicity of fresh versus aged MWI ashes.
- To investigate the correlation between biological effects and chemical composition of MWI ashes.
Main Methods:
- Tested 12 MWI ash samples from various incineration plants.
- Utilized aquatic ecotoxicity tests on eluates (algae, daphnia, luminescent bacteria).
- Conducted terrestrial ecotoxicity tests on solid waste (plants, earthworms, bacteria).
Main Results:
- Some MWI ashes demonstrated significant ecotoxicological hazard potential.
- Fresh ashes were generally more toxic than aged ashes, but this difference was not consistent.
- No clear correlation was found between the measured biological effects and the analyzed chemical compounds in the ash samples.
Conclusions:
- MWI ashes can present ecotoxicological risks, necessitating careful classification.
- Biological testing provides essential data for assessing MWI ash hazards, independent of chemical analysis alone.
- Further research is needed to understand the specific drivers of ecotoxicity in MWI ashes.
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