Unusually Radiogenic Lead (Pb) in Ashtabula River Sediments: An Isotopic Tracing Case Study Using Quadrupole ICP-MS

Ketterer, Michael E.

doi:10.2174/1875038901003010202

Cited by 4 publications

(11 citation statements)

References 22 publications

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“…Its 206/204 Pb ratio of 57.7 is significantly different from the others sediment ratios, which varied from 18.7 to 25.0. The high 206 Pb/ 204 Pb and low 208 Pb/ 204 Pb ratios are characteristic of isotopic signature of uranium ores (area outlined in light green) (Ketterer et al 2010, Gulson et al 1989, Bollhöffer & Martin 2003 even though this sample contain about 28.5 mg U/kg. Table 1 summarizes the results of the chemical analysis for the U, Th e Pb in sediments and water samples and Iyer et al (1999) data measured by the X-ray Fluorescence in rock samples (Cordani et al 1992) from the Lagoa Real Uranium Complex.…”

Section: Resultsmentioning

confidence: 92%

“…2) that also includes a comparison with isotope ratios: 1. the geogenic Pb data in granite type São Timóteo (undeformed granites) and orthogneiss (deformed granites and associated U-mineralization) available for the Lagoa Real Uranium Complex (U-mineralized area) (Cordani et al 1992) and 2. data from anthropogenic contamination of U (uranogenic Pb) associated with U containing accessory minerals in a Ti ore refining process discharge (NORM waste) (Ketterer et al 2010). Figure 2 shows that, in general, the sediment samples exhibit Pb isotopic ratios higher than the groundwater samples.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, it is particularly useful to demonstrate and identify the anthropogenic input from different sources of Pb from various mining activities, such as uranium/thorium mining and others with potential to generate Naturally Occurring Radioactive Materials (NORM) (Chow et al 1975, Gulson et al 1989, Bollhöfer & Martin 2003, Moraes et al 2004, Ketterer et al 2010, Vecchia 2015, Vecchia et al 2015. The isotopic composition of Pb is not significantly affected by physical-chemical fractionation processes and it is present in the environment as 4 main isotopes: 204 Pb,206 Pb,207 Pb,and 208 Pb.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of the available isotopic studies of Pb in the environment has investigated the Pb arising from a geologic environment containing 238 U, 235 U, and 232 Th in concentrations typical of the earth's crust. Few published studies (Gulson et al 1989, Bollhöfer 2003, Bollhöfer & Martin 2003, Ketterer et al 2010, Vecchia 2015 have investigated radiogenic Pb from areas with U/Th mineralization or the Pb from areas where the radioactive elements U and/or Th may be associated with the exploited ores. The Pb isotopic compositions of U-and Th-rich environment are significantly different from a geologic environment containing U and Th relative to the crust's composition.…”

Section: Introductionmentioning

confidence: 99%

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Investigations into Pb isotope signatures in groundwater and sediments in a uranium-mineralized area

et al. 2017

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This work presents the investigation in an environment that contains uranium deposits by using Pb isotope signatures. The study area, southeast of Brazil, is characterized by the lack of surface water and, as a consequence, the groundwater plays an important role in the economy of the region, such as the supply to the uranium industry and, above all serving the needs of the local population. The objective of the present investigation is the determination of the signatures of Pb in groundwater and sediments as well as the identification of environments under influences of geogenic and/or anthropogenic sources. It was determined that the Pb in the majority of sediments was geogenic in origin. Although data from the literature, related to the environmental studies, consider 206 Pb/ 207 Pb isotopic ratio values below or close to 1.2 as an indicative of anthropogenic Pb, the 206 Pb/ 207 Pb determined for the majority of groundwater samples ranged from 1.14 to 1.19, and are similar to the data reported for rocks samples (1.09 to 1.96) from area with U mineralization. It was also determined that the anthropogenic influence of the uranium was restricted to a single sampling point within the mining area. KEYWORDS:Lead stable isotopes; Anthropogenic; Geogenic; Radiogenic Pb; Environmental monitoring. RESUMO: Este trabalho investiga um ambiente caracterizado por depósitos de urânio usando assinaturas isotópicas de

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigations into Pb isotope signatures in groundwater and sediments in a uranium-mineralized area

et al. 2017

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“…A esse Pb, dá-se o nome de Pb primordial (ou comum), sendo reconhecido como qualquer Pb proveniente de uma fase mineral com razões U/Pb e/ou Th/Pb extremamente baixas ou próximas de zero, de tal forma que nenhuma quantidade significativa de Pb radiogênico tenha sido gerada in situ desde sua formação (Gulson, 1989;Ketterer et al, 2010).…”

Section: O Pb Primordial E O Pb Radiogênicounclassified

INTERPRETAÇÃO DE DADOS ISOTÓPICOS DE Pb EM DIFERENTES AMBIENTES INVESTIGATIVOS VISANDO O DIAGNÓSTICO DE FONTES GEOGÊNICAS E/OU ANTRÓPICAS

Vecchia

Rodrigues

Ladeira

et al. 2014

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Th. Na natureza, ocorre um quarto isótopo não radiogênico, o 204 Pb, cuja abundância não é afetada pelo decaimento radioativo do U ou do Th, sendo considerada constante, desde a formação da Terra. As razões isotópicas entre esses isótopos de Pb têm sido utilizadas em investigações ambientais, onde os isótopos estáveis se comportam como traçadores capazes de caracterizar fontes geogênicas e/ou antropogênicas. Entretanto, a interpretação dos dados provenientes de investigações isotópicas de Pb, realizadas em qualquer compartimento ambiental, requer uma abordagem integrada às principais referências isotópicas geogênicas e/ou antrópicas, pertinentes ao contexto da área de estudo. Sendo assim, este artigo apresenta uma revisão sobre a aplicação dos isótopos estáveis de chumbo, os métodos de análise usualmente utilizados para determinação destes, assim como uma abordagem didática sobre ou uso do diagrama Pb, whose abundance is not affected by the radioactive decay of U and Th occurs and is considered constant, since the formation of the Earth. The isotopic ratios have been used in environmental investigations, where stable isotopes as tracers behave able to characterize geogenic and/or anthropogenic sources.Keywords: Lead stable isotopes, isotopic fingerprinting, applications, source identification. INTRODUÇÃOA maioria dos processos, naturais ou antrópicos, que ocorrem na superfície terrestre, se expressa pela presença de associações de elementos químicos características do processo gerador e geograficamente associado à sua área de ocorrência. Entretanto, essas assinaturas geoquímicas, que são singulares, poderão estar mascaradas pela superposição de outras, provenientes de origens distintas. Assim sendo, o sinal geoquímico identificável, por exemplo, nas águas e nos sedimentos, representaria um somatório passível de contribuições originadas do ambiente natural e da ação do homem (Licht, 2001). Com o objetivo de se investigar a correlação entre elemento e a fonte que a originou (geogênica ou antropogênica), no sentido de distinguir e/ou apontar ambientes que, eventualmente, tenham sofrido alguma alteração por ação antrópica e/ou aqueles que preservaram características originais (geogênicas), trabalhos realizados a partir da década de 1960, mostraram a aplicabilidade da metodologia de razões isótópicas de Pb, em estudos ambientais voltados à pesquisa das assinaturas isotópicas de Pb (Nriagu, 1989).Considerando-se que a composição isotópica de Pb não é afetada por processos físicos ou químicos (Doe, 1970;Bollhöfer et al., 1999), sua assinatura no ambiente investigado tende a ser idêntica à da fonte que a originou, assim sendo, as assinaturas isotópicas do Pb de proveniência antropogênica são distintas da assinatura isotópica de origem natural. Desta forma, a composição isotópica de Pb, diferentemente de outros metais, poderá ser utilizada como traçador das possíveis fontes de Pb no ambiente investigado, justificando-se, assim, a grande aplicabilidade dessa ferramenta na busca por questões que envolvam a correlação en...

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Sources, background and enrichment of lead and other elements: Lower Guadiana River

Batista

Oliveira

Abreu³

et al. 2013

Geoderma

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The lower sector of the Guadiana River Basin, located in southern Portugal and Spain, hosts soils and plants with elevated Pb, Cu and As near former and current mining sites. Two geogenic and two anthropogenic sources of Pb were identified where elevated concentrations are mostly related to the occurrence of sulphide-rich ore deposits, Volcanic Sedimentary formations and mining. These were generally reflected by the multiple regression analysis (MRA) and confirmed by isotope determinations. Nevertheless, caution was needed in interpreting statistical and isotopic results; therefore the combination of both techniques was important. Elements, such as Ca, Na, Cu and As, show enrichment in soil developed on shale, sandstone and conglomerate of Upper Devonian age belonging to the Phyllite-Quartzite Group. Lead exhibits an enrichment in soil developed on felsic volcanic rocks from the Volcanic Sedimentary Complex (VSC) of Upper Devonian-Lower Carboniferous age, which has been identified by the relationship between topsoil median values of different lithologies and grand subsoil median values. In the same soil, Fe, As, Co, Ni and Cr are depleted. Translocation of Pb to the aerial parts of plants is insignificant in all three plant species studied and analysed (Cistus ladanifer L., Thymus vulgaris, Lavandula luisieri). High Pb concentrations in soil, where Cistus ladanifer L. developed, the only representative number of species analysed, do not correspond generally to elevated Pb contents in plants, except near mine sites, where lower pH of soil, increases Pb bioavailability. The different statistical methodologies combined with Pb isotopic studies were successfully applied in the identification of Pb sources in soil and Cistus ladanifer L. plant of the Lower sector of Guadiana River basin. Therefore, rocks, mineralisations, subsoil, topsoil and plant processes were successfully integrated to understand the migration of Pb into the food chain.

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Unusually Radiogenic Lead (Pb) in Ashtabula River Sediments: An Isotopic Tracing Case Study Using Quadrupole ICP-MS

Cited by 4 publications

References 22 publications

Investigations into Pb isotope signatures in groundwater and sediments in a uranium-mineralized area

Investigations into Pb isotope signatures in groundwater and sediments in a uranium-mineralized area

INTERPRETAÇÃO DE DADOS ISOTÓPICOS DE Pb EM DIFERENTES AMBIENTES INVESTIGATIVOS VISANDO O DIAGNÓSTICO DE FONTES GEOGÊNICAS E/OU ANTRÓPICAS

Sources, background and enrichment of lead and other elements: Lower Guadiana River

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