Arsenic in the groundwater of Ouro Preto (Brazil) : its temporal behavior as influenced by the hydric regime and hydrogeology.
Nenhuma Miniatura disponível
Data
2007
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
In 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.
Descrição
Palavras-chave
Arsenic, Groundwater, Iron quadrangle, Brazil
Citação
GONÇALVES, J. A. C. et al. Arsenic in the groundwater of Ouro Preto (Brazil): its temporal behavior as influenced by the hydric regime and hydrogeology. Environmental Geology, v. 53, p. 785-793, 2007. Disponível em: <https://link.springer.com/article/10.1007/s00254-007-0691-0>. Acesso em: 20 de jun. 2017.