Ecotoxicity evaluation of Coal Fly ash to Daphnia similis and Danio rerio
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2017
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Applied Research in Toxicology
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Coal Fly ash is a major solid waste from coal-fired power
stations. In Brazil, more than 4 million tons per year of fly
ash are generated with a tendency to increase every year.
Only 30% of fly ash is applied as raw material for cement
and concrete production. The remaining is disposed in onsite
ponds, nearby abandoned or active mine sites, or
landfills. The inadequate disposal of fly ash may pose a
significant risk to the environment due to the possible
leaching of hazardous pollutants into the surrounding soil
and groundwater. A combination of leaching tests and
ecotoxicological analyses were used in this work for the
evaluation of the adverse effects of coal fly in non-target
organisms. Ashes were collected from coal-fired power
plant located in South of Brazil. Acute toxicity tests were
performed with Danio rerio embryos and Daphnia similis,
according to OECD 236 and ABNT NBR 12713,
respectively. Coal fly ash sample was subjected to a
leaching procedure using USEPA SW 864 Method 1311.
The leachate was prepared in seven dilutions: 1.56%,
3.12%, 6.25%, 12.5%, 25%, 50%, and 100%. The assays
were performed in triplicates and the results showed
lethality of Danio rerio after 96 hours of exposure to the
leachate, and the calculated LC50 was 4.39%. The
ecotoxicity tests with Daphnia similis, observed
immobility after 48 hours of exposure to the leachate, and
EC50 calculated was 7.25%. The results of these tests
indicate toxicity of the coal fly ash leachate toward
exposed organisms.
Como referenciar
CAVALCANTE, A.K.; DAMASCENO, K.C.; MAZIERO, J.S.; MARTINI, G.A.; ORMENIO, M.B.; MAMEDE, F.C.S.; MIRANDA, C.S.; IZIDORO, J.C.; CAMPELLO, F.A.; FUNGARO, D.A.; ROGERO, S.O.; ROGERO, J.R. Ecotoxicity evaluation of Coal Fly ash to Daphnia similis and Danio rerio. Applied Research in Toxicology, v. 2, p. 48-48, 2017. suppl. 1. Disponível em: http://repositorio.ipen.br/handle/123456789/28110. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.