Geoquímica de solos do pantanal norte, Mato Grosso

Coringa, Elaine de Arruda Oliveira; Couto, Eduardo Guimarães; Vidal‐Torrado, Pablo

doi:10.1590/s0100-06832014000600013

Cited by 14 publications

(6 citation statements)

References 11 publications

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“…Rev Bras Cienc Solo 2018;42:e0170231 (Santos and Alleoni, 2013;Coringa et al, 2014;Preston et al, 2014;Almeida Júnior et al, 2016). These results can be attributed to the abundance of mineralized rocks in the highlands that form the drainage divide of the RDB (Dardenne and Schobbenhaus, 2001).…”

Section: Discussionmentioning

confidence: 99%

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Reference Values of Soil Quality for the Rio Doce Basin

Guevara

Souza

Veloso

et al. 2018

Rev. Bras. Ciênc. Solo

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The great geological and soil variation in the state of Minas Gerais, Brazil, indicates the need for regional studies to understand the geochemical background of soils. The Rio Doce Basin became a priority area for geochemical background determination after the rupture of the tailings dam of Fundão in 2015. In this context, the objectives of this study were to propose Reference Values of Soil Quality in the Rio Doce Basin, to define variables that can predict metal(loid) concentrations in the soil, and to examine the correlation between metal(loid) concentrations determined by X-ray fluorescence and by the traditional method. One hundred and seven samples were collected from minimally disturbed areas, representing the main soils and source materials. Metal(loid)s were determined by acid digestion and X-ray fluorescence. Descriptive statistics of the data, as well as the calculation of the Randomized Dependence Coefficient (RDC) and Principal Component Analysis (PCA) were carried out. The soils were found to be acidic, dystrophic with low Mehlich-1 extracted P contents, and have a variable texture. The coefficient of determination ranged from 0.4 to 0.9, suggesting X-ray fluorescence as a promising technique for determining metal(loid) concentrations in soils. The absence of correlation between clay and organic matter contents with metal(loid) concentrations suggests that the latter were inherited exclusively from the parent material, with little influence of pedogenesis. Metal mineralization in the highlands that constitute the topographic drainage divide of the basin increase the reference values of soil quality to higher values than established for the State of Minas Gerais.

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Section: Discussionmentioning

confidence: 99%

“…In this case, regionalized reference values would ensure successful monitoring. The law that defines the criteria and guidelines of soil quality values (Conama, 2009) allows regionalized QRV in the Brazilian states, as already applied in the state of Rio Grande do Sul (Fepam, 2014) and underway for other biomes (Coringa et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Reference Values of Soil Quality for the Rio Doce Basin

Guevara

Souza

Veloso

et al. 2018

Rev. Bras. Ciênc. Solo

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“…Por outro lado, Coringa et al (2014) verificaram que o cromo foi detectado somente em alguns solos do Pantanal, enquanto o Cu foi detectado somente em alguns horizontes de poucos perfis. Os elementos Mn e Fe foram os que apresentaram maior porcentagem de valores acima do VMP (Tabela 1), no entanto não indicam uma poluição, uma vez que refletem a geoquímica da área de estudo.…”

Section: Resultsunclassified

“…Este fato relaciona-se com a composição do solo da região, que é rico em óxidos de Fe e Mn e também em Zn (Fadigas et al, 2002;Coringa et al, 2014) representando uma influência claramente geogénica. Por outro lado, os elementos Pb e Cr foram também detectados com elevada frequência no sedimento.…”

Section: Resultsunclassified

Metais potencialmente tóxicos em rios a montante do Pantanal Norte

Magalhães¹,

Fantin-Cruz²,

Zeilhofer³

et al. 2016

Rev. ambiente água

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RESUMOOs rios Cuiabá (CBA) e São Lourenço (SL) são considerados estratégicos por integrar regiões de grande relevância econômica, social e ambiental para o Brasil e o mundo. Porém, diversas atividades nas bacias destes rios podem representar fontes de metais potencialmente tóxicos e comprometer a sua qualidade ambiental. Neste trabalho foi avaliada a variabilidade espacial e temporal da concentração de metais nestas bacias e a sua relação com parâmetros de qualidade da água. Foram coletadas mensalmente, de agosto/2012 a julho/2013, 15 amostras de água superficial e 9 amostras de sedimento de fundo, nos rios CBA e SL. As concentrações de Cr, Cu, Fe, Mn, Pb e Zn nas amostras de água foram determinadas por espectrometria de emissão óptica com plasma acoplado indutivamente, e nas amostras de sedimento de leito, por espectrometria de absorção atômica com atomização em chama. Os elementos Fe, Mn, Pb e Cr apresentaram elevadas concentrações nas amostras de água e sedimento, porém apenas Pb e Cr representam potencial risco ambiental. As concentrações de Fe e Mn foram mais elevadas na parte alta do rio SL enquanto as concentrações de Cu e Pb ocorreram na área dos centros urbanos. Temporalmente, os metais estiveram associados ao regime pluviométrico. A correlação observada entre metais indica uma fonte comum. Desta maneira, a ocorrência e concentração de metais nos rios CBA e SL mostram contribuição de origem natural, reflexo do tipo de solo associado ao regime pluviométrico da região, bem como contribuição antrópica devido às atividades agropecuárias e ao lançamento de efluentes urbanos não tratados.Palavras-chave: água, poluição, sedimento de leito.Potentially toxic metals in rivers upstream of Pantanal Norte ABSTRACT Cuiabá (CBA) and São Lourenço (SL) rivers are considered strategic once they integrate regions, which are economically, socially and environmentally relevant for Brazil and the world. However, several activities developed in their watersheds may represent sources of

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“…Studies in tropical wetland areas, xeric shrubland, savanna-like vegetation, and Atlantic forest in Brazil have shown metal(loid) contents associated with parent material (Licht et al, 2006;Coringa et al, 2014;Souza et al, 2015;Almeida Júnior et al, 2016). The highest contents of Ti are observed in mafic rocks.…”

Section: Introductionmentioning

confidence: 99%

Geochemical Signature of Amazon Tropical Rainforest Soils

Souza

Fontes

Gilkes

et al. 2018

Rev. Bras. Ciênc. Solo

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Evaluating soil geochemical diversity in the Amazon Basin has been a challenge largely because most study sites have been at the edge of the basin and it is difficult to get samples in such a region. Here we show that even among the most weathered soils, physicochemical soil properties express lithology. Our results are based on topsoil samples collected from different locations in minimally disturbed areas in the state of Amazonas, Brazil. Soil properties were measured using methods which are suitable for highly developed soils. The Chemical Index Alteration and Weathering Index of Parker was calculated based on the content of metal(loid)s in soils determined by X-ray fluorescence. Descriptive statistics, Pearson correlation, and Principal Component Analysis (PCA) were performed on data. In general, Amazon rainforest soils are more deeply weathered than soils in other Brazilian biomes and tropical rainforests in Asia and Africa. The high coefficient of variation of metal(loid) contents express pedogenesis and parent material diversity. Correlation analysis indicated that the tri-pentavalent elements are strongly associated with Al and Fe contents in the topsoil. In contrast, mono-divalent elements are correlated with sand and silt fractions. According to PCA, five soil groups with defined geochemical compositions and degrees of weathering could be identified: i) acidic sandy podzolized soils; ii) acidic loamy ferralitic soils with the highest content of tri-pentavalent ions; iii) acidic clayey kaolinitic soils with low metal(loid) contents; iv) acidic loamy kaolinitic soils with low metal(loid) contents; and v) silty neutral 2:1 clay soils. This study is the first effort to analyze the geochemical diversity in Amazon rainforest soils. These data are extremely valuable in determining the geochemical background for these soil types and this region. Geochemical variability can be predicted to some extent by lithology and pedogenesis, which can be applied to define the sampling required in future studies.

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Geoquímica de solos do pantanal norte, Mato Grosso

Cited by 14 publications

References 11 publications

Reference Values of Soil Quality for the Rio Doce Basin

Reference Values of Soil Quality for the Rio Doce Basin

Metais potencialmente tóxicos em rios a montante do Pantanal Norte

Geochemical Signature of Amazon Tropical Rainforest Soils

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