Avaliação da toxicidade de fluidos de usinagem através da ecotoxicologia aquática / Evaluation of the toxicity of fluids employed in the metallic tool industrial machining using aquatic ecotoxicology

AUTOR(ES)

Ricardo dos Santos Coelho

DATA DE PUBLICAÇÃO

2006

RESUMO

Ecotoxicological analyses have being used to monitor environmental samples, industrial effluents and complex substances. With the objective to analyze the toxicity of cutting fluids used in the machinery industry, acute toxicity test with species of three different throphic levels: Vibrio fischeri, Daphnia similis, Daphnia laevis e Danio rerio, were performing. The samples of fluids were analyzed by COD, phenol, pH, color, density and surfactants. The physical and chemical parameters are the according with the brazilian law, CONAMA 357 (D.O.U. 2005}. The results of the toxicity tests showed that the cutting fluids have high toxicity to the organisms used in this study and the gamma radiation treatment was not efficient to decrease the matrix. The biodegradation in soil demonstrated be effective to the cutting fluids and the indigenous bacteria were identified and isolated to possible treatment of soils contaminated with these kinds of substances. The monitoring and management of residues of cutting fluids are necessary to preservation of aquatic live, in consequence of their high toxicity.

ASSUNTO(S)

ecotoxicologia aquática bioensaios fluidos de usinagem aquatic ecotoxicology toxicity tests cutting fluis

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