Assessment of hazardous property HP 14 using ecotoxicological tests: a case study of weathered coal fly ash
Autor: | Fernando Gonçalves, Rui C. Martins, Joana Luísa Pereira, Margarida J. Quina, Luciano A. Gomes, Beatriz S. Bandarra |
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Rok vydání: | 2020 |
Předmět: |
biology
Health Toxicology and Mutagenesis Daphnia magna Context (language use) General Medicine 010501 environmental sciences Ecotoxicology Pulp and paper industry biology.organism_classification Aliivibrio fischeri Coal Ash 01 natural sciences Pollution Coal Raphidocelis subcapitata Daphnia Hazardous waste Fly ash Animals Environmental Chemistry Environmental science Ecotoxicity Valorisation 0105 earth and related environmental sciences |
Zdroj: | Environmental Science and Pollution Research. 27:20972-20983 |
ISSN: | 1614-7499 0944-1344 |
DOI: | 10.1007/s11356-020-08515-8 |
Popis: | The classification of wastes regarding hazardous property HP 14 (ecotoxicity) is essential for proper waste management. In the EU, HP 14 has been estimated based on waste chemical composition rather than using biotests, and guidelines for experimental assessment are still lacking. This study aims at evaluating the potential ecotoxicological impacts of weathered coal fly ash (CFA) from a landfill, as a case study to assess the current EU methodology used to classify wastes regarding HP 14. A large amount of CFA is still landfilled, but its valorisation would be of interest. The analysis was based on the chemical composition of CFA (in ClassifyMyWaste software), and on a battery of five biotests applied to eluates, with Lepidium sativum, Aliivibrio fischeri, Raphidocelis subcapitata, Lemna minor and Daphnia magna. Through chemical analysis, most of the simulations with data from the literature indicated "Possible Hazard", including the sample of this work. Biotests revealed low impairment for most endpoints. D. magna was the most sensitive organism, but the inhibitory effect was significantly reduced after pH adjustment of the eluate. The test with A. fischeri does not seem to be adequate to assess CFA due to the high variability observed in results. The methodology involving a simple battery of bioassays was proven to be enlightening, providing relevant results for HP 14 assessment. The chosen battery of biotests (excluding the A. fischeri test) may be a good starting point to represent the aquatic environment in this context. In short, it seems that weathered CFA can be considered non-hazardous, and therefore the material under analysis could be valorised in practical applications without significant ecotoxic effect on the environment. |
Databáze: | OpenAIRE |
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