Navegando por Palavras-chave "Toxic waste - heavy metals"

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    Determinação de cádmio, crômio e mercúrio por espectrometria de fluorescência de raios X em cooperativas de reciclagem da Região Metropolitana de São Paulo
    (Universidade Federal de São Paulo, 2015-05-15) Vieira, Willian de Oliveira Novais [UNIFESP]; Assunção, Nilson Antonio de [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Throughout history humans have been exposed to various elements present in nature and substances derived from their activities, with the technological advances and the possibility of electronic purchase this exhibition became pronounced, especially in recycling cooperatives where the amount of such equipment It is high. For lack of information handling them inappropriately collectors materials and also do not use the proper protective equipment which enhances exposure to toxic waste. The amount, the route and the exposure period are decisive factors in determining the risk that each element is to the health of workers and can cause acute or chronic poisoning. We evaluated the concentration of metals: cadmium, chromium and mercury in 18 recycling cooperatives in the metropolitan region of São Paulo. These elements were chosen because of their impact on the environment; particularly industrialized regions like the city of Diadema and present a major risk to human health. Analyses were carried out in partnership with the GEA Institute - Ethics and Environment, and the elements were determined by fluorescence spectrometry X-rays, using portable instrument. The metals were determined in soils, workspaces and public contact sites in cooperatives, and their concentrations ranged from 7 ± 1-5706 ± 811 (ppm). In some analyzes it was observed standard deviations above average, suggesting occasional contamination. In general, the concentrations of metals in the samples are above the levels permitted or recommended by national and international standards, and in some cases, there are differences between the regulatory agencies as the maximum tolerable limits, but there is agreement on the potential risk exposure the metals poses to human health and the environment.