Toxidade do resíduo areia de fundição utilizando o teste com a bacteria luminescente Vibrio Fischeri / Toxicity of foundry sand wastes using the luminescent bacteria vibro fischeri assay
Soares, Wálace Ânderson Almeida; Ferraresi, Gabriela Nenna; Quináglia, Gilson Alves; Umbuzeiro, Gisela de Aragão.
Rev. bras. toxicol;
23(1/2): 17-21, 2010. tab
Artículo
en Portugués
| LILACS | ID: lil-619284
Wastes foundry sand can be contaminated by metals, depending on the kind of metal that is molten in the casting industry and/or organics from chemical bindings used in these process. Because of the complexity of these mixtures it is difficult to characterize using only chemical analyses. In order to obtain information about the ecological hazard of those samples, biological tests can be used. The acute toxicity test with the luminescent bacteria Vibrio fischeri is a good choice due to its simplicity, low cost and rapid response. In this work virgin and used foundry sands from four different mold-making industries were analyzed. The aqueous extract of the nine virgin sands tested showed negative results for the luminescent bacteria. Ten out of the eighteen used sand samples were positive and they all belonged to the organics chemical-bounded sand process. The samples derived from the green sand mold-making process showed negative responses. Our work confirms that the Vibrio fischeri acute test can be used as an additional tool to evaluate the ecotoxicological hazard of foundry sands and that the toxicity seems to be related to the mold-making process.
Biblioteca responsable:
BR275.1
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