EM - Escola de Minas
URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6
Notícias
A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.
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2 resultados
Resultados da Pesquisa
Item Arsenic in the groundwater of Ouro Preto (Brazil) : its temporal behavior as influenced by the hydric regime and hydrogeology.(2007) Gonçalves, José Augusto Costa; Lena, Jorge Carvalho de; Paiva, José Fernando de; Nalini Júnior, Hermínio Arias; Pereira, Janice CardosoIn the city of Ouro Preto (MG), water catchment for public supply originates from superficial drainage, springs, old abandoned mines and some driven wells. In the rocks of the region, As is originally found in gold-enriched sulphide-bearing mineral deposits. The weathering process introduces As into the hydrological system by dissolution of this element into the leachate. Measurement of the As content in the groundwater of some catchments was carried out during 1 year and these measurements demonstrated high As content—up to 224 lg L–1 of As(V)—during the rainy season (the maximum concentration limit according to World Health Organization is 10 lg L–1). Lower values were observed during the dry season and in some sampling stations, As was not even detected. The As concentration variability during 1 year shows a strict and direct relationship to seasonal and hydrological conditions. For city authorities, responsible for public water supply, it is necessary to perform a complete inventory of the water sources used and constantly monitor the As content in the water.Item Avaliação de risco à saúde humana por contaminação natural de arsênio nas águas subterrâneas e nos solos da área urbana de Ouro Preto (MG).(2013) Gonçalves, José Augusto Costa; Lena, Jorge Carvalho deNa avaliação da exposição humana à contaminação natural por arsênio (As) das águas subterrâneas e solos na área urbana da cidade de Ouro Preto, MG), nos bairros Piedade, Taquaral, Padre Faria, Alto da Cruz, Antônio Dias e Barra, foram estimados, para as crianças e adultos residentes nesses locais: (i) os valores das doses de ingestão diárias (DID) de As; (ii) os valores para os quocientes de risco (QRs) e (iii) o incremento da probabilidade de se desenvolver câncer ao longo da vida (RC), com teores médios de As encontrados nas águas subterrâneas, variando entre 10 e 77 μg.L-1 e, nos solos, de 332,75 e 656 mg.kg-1.