Determination of the presence of Barium, Lead and Crhomium in the groundwater samples colleted in the Aquifer Bauru / Determinação da presença de Bário, Chumbo e Crômio em amostras de água subterrânea coletadas no Aqüífero Bauru

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The occurrence of chemical element in groundwater has a great importance in the world because of the diversity of toxic effects and wide distribution in the environment. Between these chemical elements, we can cite barium, lead and chromium that can induce diverse effects such neurotoxicity and carcinogenicity. It has been considered that the aquifer Bauru has high vulnerability. Therefore the contamination may occur due to the presence of these elements in the soil related to a variety of sources. So, the objectives of this study were: the validation of the method of atomic spectrometry by inductively coupled plasma ICP OES; and the determination of these compounds in samples of groundwater collected in aquifer Bauru. We collected samples in 56 sites located in 55 municipalities in the western region of the state of São Paulo. Almost all the samples analyzed were in accordance with the Brazilian law, for drinking water proposes (Resolução CONAMA n° 396) in relation to the elements. Only 11 sites showed values above to the established: one for Barium and ten for Chromium. The threshold Values allowed for these elements are respectively, of 0.7mg.L-1Ba and 0.05mg.L-1Cr.

ASSUNTO(S)

aquifer bauru lead chumbo barium bário aqüífero bauru chromium crômio

ACESSO AO ARTIGO

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