JOAO COUTINHO FERREIRA

Resultados de Busca

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Uranium recovery from waste of the nuclear fuel cycle plants at IPEN-CNEN/SP
2011 - FREITAS, ANTONIO A.; FERREIRA, JOAO C.; ZINI, JOSIANE; SCAPIN, MARCOS A.; CARVALHO, FATIMA M.S. de
Recuperacao de chumbo-208 radiogenico de residuo contendo torio e terras raras
2008 - FERREIRA, J.C.; FREITAS, A.A. de; SENEDA, J.A.; CARVALHO, F.M.S. de; ABRAO, A.
Estudo de metais e de substâncias tóxicas em brinquedos
2009 - ZINI, JOSIANE; FERREIRA, JOAO C.; CARVALHO, FATIMA M.S. de; BUSTILLOS, JOSE O.W.V.; SCAPIN, MARCOS A.; SALVADOR, VERA L.R.; ABRAO, ALCIDIO
The main goal of the present study is the analysis of toxic elements in plastic toys commercialized in Brazil. Metals like cadmium, lead, chromium, zinc, and aluminum, along with organic substances, such as phthalates, were identified in different toys by quantitative analytical techniques. Traces of thorium were detected in one of the studied samples. Although the measured radioactive dose was rather low, the presence of such a radioactive contaminant is against to the International Agency of Atomic Energy regulations. Similar toys manufactured in Brazil were analyzed and found to observe the standards defined by the National Institute of Metrology (Inmetro).