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Ecotoxicological information

Toxicity to soil microorganisms

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Description of key information

No harmful effect could be observed, he test substance has no significant effect on the dehydrogenase activity of Arthrobacter globiformis.

Key value for chemical safety assessment

Additional information

On behalf of the VGB PowerTech e. V. the toxicity of ashes to plants was assessed by Roembke (2008) according to the DIN 38412-L48 (2002); German standard methods for the examination of water, waste water and sludge - Bio-assays (group L) - Part 48: Toxicity test with Arthrobacter globiformis for contaminated solids (L 48). The tested fly ash (FA1) was structural related to ash (residues), cenospheres and as cenospheres are a component of fly ash, these results can be used as read across. 

During an exposure period of 3h, Arthrobacter globiformis was exposed to different concentrations of fly ash. Under the conditions of this study no EC50 could be determined. The test substance has no significant effect on the dehydrogenase activity of Arthrobacter globiformis.