Human and environmental contamination in the Iron Quadrangle, Brazil
Identifieur interne : 000D61 ( Main/Curation ); précédent : 000D60; suivant : 000D62Human and environmental contamination in the Iron Quadrangle, Brazil
Auteurs : Jörg Matschullat [Allemagne] ; Ricardo Perobelli Borba [Brésil] ; Eleonora Deschamps [Brésil] ; Bernadino Ribeiro Figueiredo [Brésil] ; Thomas Gabrio [Allemagne] ; Michael Schwenk [Allemagne]Source :
- Applied Geochemistry [ 0883-2927 ] ; 1999.
Abstract
Arsenic (As) exposure is a potential health risk to local populations around Au mining areas in southeastern Brazil. In April 1998, 126 schoolchildren, aged 9.8±1.12 years in the Minas Gerais mining districts of Nova Lima and Santa Barbara, had their spontaneous urine sampled. Toxicologically low Cd (0.04–0.35 μg L−1, mean 0.13 μg L−1), partly elevated Hg (0.1–16.5 μg L−1, mean 1.1 μg L−1), and generally elevated to high As concentrations (2.2–106 μg L−1, mean 25.7 μg L−1) were found. Twenty per cent of the total sample population showed elevated As concentrations where adverse health effects cannot be excluded on a long-term basis. To assess the potential sources particularly of As, a parallel study of surface waters, sediments, soils, and tailing materials was conducted. While Cd and Hg values were low in all these media, As concentrations in water (0.4–350 μg L−1; mean 30.5 μg L−1), in soils (200–860 mg kg−1), sediments (22–3200 mg kg−1, mean 350 mg kg−1), and tailings (300–21000 mg kg−1; mean 10500 mg kg−1) reveal high concentrations which may lead to an explanation for As pathways in the investigated areas.
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DOI: 10.1016/S0883-2927(99)00039-6
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Box 6152, CEP 13083-970 Campinas, S.P.</wicri:regionArea><wicri:noRegion>S.P.</wicri:noRegion></affiliation></author><author><name sortKey="Deschamps, Eleonora" sort="Deschamps, Eleonora" uniqKey="Deschamps E" first="Eleonora" last="Deschamps">Eleonora Deschamps</name><affiliation wicri:level="1"><country xml:lang="fr">Brésil</country><wicri:regionArea>FEAM, Av. Prudente de Morais 1671, CEP 30380-000 Santa Lucia, Belo Horizonte, M.G.</wicri:regionArea><wicri:noRegion>M.G.</wicri:noRegion></affiliation></author><author><name sortKey="Figueiredo, Bernadino Ribeiro" sort="Figueiredo, Bernadino Ribeiro" uniqKey="Figueiredo B" first="Bernadino Ribeiro" last="Figueiredo">Bernadino Ribeiro Figueiredo</name><affiliation wicri:level="1"><country xml:lang="fr">Brésil</country><wicri:regionArea>Instituto de Geociências, UNICAMP, P.O. 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In April 1998, 126 schoolchildren, aged 9.8±1.12 years in the Minas Gerais mining districts of Nova Lima and Santa Barbara, had their spontaneous urine sampled. Toxicologically low Cd (0.04–0.35 μg L−1, mean 0.13 μg L−1), partly elevated Hg (0.1–16.5 μg L−1, mean 1.1 μg L−1), and generally elevated to high As concentrations (2.2–106 μg L−1, mean 25.7 μg L−1) were found. Twenty per cent of the total sample population showed elevated As concentrations where adverse health effects cannot be excluded on a long-term basis. To assess the potential sources particularly of As, a parallel study of surface waters, sediments, soils, and tailing materials was conducted. While Cd and Hg values were low in all these media, As concentrations in water (0.4–350 μg L−1; mean 30.5 μg L−1), in soils (200–860 mg kg−1), sediments (22–3200 mg kg−1, mean 350 mg kg−1), and tailings (300–21000 mg kg−1; mean 10500 mg kg−1) reveal high concentrations which may lead to an explanation for As pathways in the investigated areas.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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