Radionuclides, heavy metals and fluorine incidence at Tapira phosphate rocks, Brazil, and their industrial (by) products

Conceição, Fabiano Tomazini da; Bonotto, Daniel Marcos

doi:10.1016/j.envpol.2005.05.014

Cited by 82 publications

(35 citation statements)

References 37 publications

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“…The application rate of chemical fertilizers (NPK type) was about of 600 kg/ha in a year (Conceição and Bonotto, 2006). Based on this average application rate, the annual addition of natural specific activities distributed per unit area and mass (Bq/m 2 and Bq/kg) corresponded to 0.…”

Section: Resultsmentioning

confidence: 99%

“…The phosphate material is very insoluble, and therefore, in its original state is practically unavailable as a plant phosphors source (IAEA, 1973). Among the constituents of agricultural phosphate fertilizers are potassium ores (potassium sulphate, potassium chloride) (Conceição and Bonotto, 2006). Investigation of gamma activity in the chemical fertilizers, has been performed in order to determine the effect of the use of chemical fertilizers on human health.…”

Section: Introductionmentioning

confidence: 99%

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Investigation the natural radioactivity in local and imported chemical fertilizers

Hussain

2011

Braz. arch. biol. technol.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation the natural radioactivity in local and imported chemical fertilizers

Hussain

2011

Braz. arch. biol. technol.

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“…Bragança et al 28 showed high concentrations of Ca (16.2 ± 0.2%), Sc (55 ± 3 mg kg -1 ) and Th (240 ± 40 mg kg -1 ) in the phosphate ore from Catalão deposit. In addition, Conceição and Bonotto 29 showed industrial products from Tapira ore with average concentrations as high as 7.6% P, 36.5% Ca and 1% SrO (or 8456 mg kg -1 Sr).…”

Section: Geochemical Signature and Source Markersmentioning

confidence: 99%

“…We examined the inter-relationships shown by P and Fe and some other anomalous elements (Cr, Zn, Zr, Cd, and Th), whose concentrations in the ores of interest have been reported in the literature. Figure 6 shows the average concentrations of these elements in phosphate concentrates from Tapira 29 and Catalão ore deposits, 16 and in iron concentrates from Águas Claras ore deposit. 27 As can be seen in this figure, the concentrations of Zn and Cd were of the same order of magnitude in both phosphate and iron concentrates.…”

Section: Geochemical Signature and Source Markersmentioning

confidence: 99%

“…7−11 Despite the effluent emission control by São Paulo State Environmental Protection Agency (CETESB), tracemetal levels in sediments are high at present in the SantosCubatão Estuarine System, since the sediments act as sinks for metal contaminants. 1 So, high enrichment factors (EF) of metals in surficial fine-grained sediments in relation to pre-industrial background levels have been recorded for Hg (maximum EF = 49), Mn (48), La (29), Ca (20), Sr (19), Cd (18), Zn (16), Pb (12), Cu (11), Cr (8.4), Fe (> 6.8), Nb (6.9), Y (6), Ni (4.4), and Ga (3.1). 1 Although the study area has been contaminated for many years, a rich and preserved mangrove ecosystem resists, which is a habitat for ten of thousands of northhemisphere migratory and resident birds, some of them endangered species globally, such as the Scarlet Ibis (Eudocimus ruber), known as "guará".…”

Section: Introductionmentioning

confidence: 99%

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Multi-elemental contamination and historic record in sediments from the Santos-Cubatão Estuarine System, Brazil

Luiz-Silva¹,

Machado²,

Matos³

2008

J. Braz. Chem. Soc.

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Este trabalho registra pela primeira vez o histórico da contaminação e as fontes de 38 elementos em sedimentos do sistema estuarino de Santos-Cubatão (SE do Brasil), em uma das áreas mais industrializadas da América Latina. A composição de um testemunho de 260 cm de profundidade do estuário do rio Morrão foi determinada por ICP-MS e avaliada por meio de fatores de enriquecimento, análise de componentes principais, matrizes de correlação e assinaturas geoquímicas. Elementos contaminantes como Cr, Mn, Ni, Zn, Ga, Ag, Cd, Sn, Sb, Pb e Bi foram associados ao Fe, derivados de atividades siderúrgicas, enquanto Be, Ca, Sc, Co, Cu, Sr, Y, Zr, Nb, Hf, Ta, Th e U estiveram associados ao P, relacionados ao processo produtivo de fertilizantes. Uma sobreposição da distribuição do Fe sedimentar e produção local de aço indicaram que o Fe é um marcador confiável do histórico da contaminação, permitindo a estimativa de taxas de sedimentação para 45 anos de atividades industriais. This paper records for the first time the contamination history and identifies the sources of 38 elements in sediments from the Santos-Cubatão Estuarine System (SE Brazil), at one of the most industrialized areas in Latin America. The compositions of samples from a 260 cm long sediment core collected in the Morrão River estuary were determined by ICP-MS. Enrichment factors, principal component analysis, correlation matrixes, and the characterization of geochemical signatures permitted a consistent data evaluation. Contaminant elements such as Cr, Mn, Ni, Zn, Ga, Ag, Cd, Sn, Sb, Pb, and Bi were associated with steel plant-derived Fe concentrations, while Be, Ca, Sc, Co, Cu, Sr, Y, Zr, Nb, Hf, Ta, Th, and U were associated with fertilizer industry-derived P concentrations. An overlap of sedimentary Fe distribution and local steel plant production indicated that Fe is a reliable marker of the contamination history, allowing the estimation of sedimentation rates over a period of 45 years of industrial activities. Keywords: intertidal sediments, pollution, trace-elements, contamination source, industrial contamination IntroductionHuman activities in coastal areas have accelerated the input of chemical contaminants to coastal ecosystems, implying in environmental concerns at local, regional and global scales. Despite the implementation of contamination control policies, anomalously high levels of multiple contaminants have still been recorded in many coastal sediments, as observed in the Santos-Cubatão Estuarine System in São Paulo State, Southeastern Brazil. 1 This setting is historically, economically and environmentally important at a regional scale. Human activities in the estuary started in the beginning of the 16 th century, just after the arrival of the first Portuguese explorers in Brazil. The process of colonization began in São Vicente City, the oldest Brazilian colonization settlement, and soon afterwards in Santos City, the home of the largest harbor in Latin America today.The riverine and estuarine systems in this area have been seriously contami...

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Uran

Utermann,

Schnug

2004

Bodengefährdende Stoffe: Bewertung ‐ Stoffdaten ‐ Ökotoxikologie ‐ Sanierung

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Uran bildet eine Reihe von Verbindungen, in denen es in den Oxidationsstufen III, IV, V, VI vorliegen kann. Uran‐Verbindungen sind giftig. Die Toxizität wird v. a. durch deren Löslichkeit bestimmt. Die leichtlöslichen Uranyl‐Salze sind am giftigsten, die schwerlöslichen Oxide hingegen weniger giftig. Uran ist kanzerogen und teratogen. Nach dem II. Weltkrieg wurde Uran auf dem Gebiet der DDR von der ehemaligen SDAG Wismut in großem Umfang abgebaut und als Reparationsleistung an die Sowjetunion geliefert. Bis heute wird abgereichertes Uran (depleted uranium, DU) im Flugzeugbau, als Abschirmung in der Atomindustrie, in panzerbrechender Munition oder als Panzerarmierung verwendet.

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Radionuclides, heavy metals and fluorine incidence at Tapira phosphate rocks, Brazil, and their industrial (by) products

Cited by 82 publications

References 37 publications

Investigation the natural radioactivity in local and imported chemical fertilizers

Investigation the natural radioactivity in local and imported chemical fertilizers

Multi-elemental contamination and historic record in sediments from the Santos-Cubatão Estuarine System, Brazil

Uran

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