Teores de arsênio e cádmio em solos do bioma cerrado

Campos, Mari Lucia; Guilherme, Luiz Roberto Guimarães; Marques, João José; Curi, Nilton; Araújo, Alessandra Siqueira Antunes; Miquelluti, David José; Lopes, Cláudia B.; Spiazzi, Fábio Rodrigues

doi:10.1590/s0100-06832013000100029

Cited by 12 publications

(10 citation statements)

References 18 publications

(15 reference statements)

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“…A significant increase in the As content at the 0.40-0.70 m layer (Figure 4b) compared to the 0.00-0.20 m layer was observed, mainly for W1 and W5. Since the 0.00-0.20 m layer is richer in organic matter than the 0.40-0.70 m layer (Table 1), this result suggests a negative correlation between the As content and organic matter as has also been suggested by Campos et al (2013) for non-hydromorphic soils of the Brazilian Cerrado biome. As occurs in soils mainly as H 2 AsO 4 and HAsO 4 2-, and similar to H 2 PO 4 and HPO 4 2-, it has a weak adsorption on negatively charged organic compounds.…”

Section: Trace-element Contents In Wetlands Soilssupporting

confidence: 68%

“…The highest Cd content was only 77 µg kg -1 in the upper position of the W3 wetland area. In the same region, the average Cd content for non-hydromorphic soils has been previously measured at 1,880 µg kg -1 (Campos et al, 2013). In wetland soils affected by different land-uses in China, the Cd content ranged from 790-2,920 µg kg -1 (Bai et al, 2010).…”

Section: Trace-element Contents In Wetlands Soilsmentioning

confidence: 98%

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Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

Ribeiro

Nascimento

Curi

et al. 2019

Rev. Bras. Ciênc. Solo

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In the Brazilian Cerrado biome, there are wetlands locally known as "Veredas", which are swampy plains between hills and rivers. Since the 1970's, the Cerrado biome has been gradually converted to livestock, crop, or forestry production. Until now, very few studies were conducted to evaluate the baseline contents of trace elements in Cerrado wetland soils. Due to their position in the landscape (bottom lands), the wetlands are potentially susceptible to contamination by runoff and/or leaching from surrounding areas at higher altitudes. This work evaluated the As, Cd, Pb, Ni, Zn, Cu, Mn, and Fe contents in soils from six wetlands (undisturbed and disturbed) in the Minas Gerais Triangle region, Brazil. In each wetland, we collected topsoil samples (0.00-0.20 m layer) and subsurface samples (0.40-0.70 m layer) at different landscape positions in the wetlands (upper, middle, and bottom positions). The soil samples were air-dried, ground, and sieved through 2-mm mesh. Afterwards, the soil digestion was performed according to the USEPA 3051A protocol, and the trace elements were determined by atomic absorption spectrometry (flame or graphite furnace atomization). Water samples were also collected monthly from September 2014 to September 2015 to determine the elemental composition by inductively coupled plasma optical emission spectrometry. The contents of all soil trace elements studied were below the threshold values established by Brazilian guidelines. The soil trace element (cations and/or oxyanions) distributions varied according to soil depth and organic matter content. Our findings contribute to the sparse inventory of Brazilian Cerrado wetlands regarding trace-element contents.

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Section: Trace-element Contents In Wetlands Soilssupporting

confidence: 68%

Section: Trace-element Contents In Wetlands Soilsmentioning

confidence: 98%

Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

Ribeiro

Nascimento

Curi

et al. 2019

Rev. Bras. Ciênc. Solo

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“…2). Campos et al (2013b) determined background levels of As in representative soils from the states of Goiás and Minas Gerais (from 2000 to 2500 km far away from the studied sites), which belongs to Cerrado biome (Brazil) in three sub-regions and observed concentrations similar to those found in the southern Amazon in the present study, with mean concentrations in a decreasing order as follow: East of state of Goiás (3.29 mg kg −1 ) N Triângulo Mineiro (state of Minas Gerais) (2.18 mg kg −1 ) N Northeast of Minas Gerais (0.62 mg kg −1 ). The highest As concentrations were observed in profiles of plintosols and cambisols from the East of Goiás.…”

Section: Total As Concentration In Soilmentioning

confidence: 99%

Natural variation of arsenic fractions in soils of the Brazilian Amazon

Júnior

Martins

Wadt³

et al. 2019

Science of The Total Environment

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“…Therefore, even though parent materials have large influence on soil PTE contents (Fadigas et al, 2002;Oliveira and Costa, 2004;Campos et al, 2012), the effect of this factor depends on pedogenic development that, through many reactions and processes, can enhance or attenuate the original contents of rocks and sediments (Kampf and Curi, 2012;Souza et al, 2015).…”

Section: Association Of Potentially Toxic Elements (Pte) To Soil Clasmentioning

confidence: 99%

Mineralogy and Concentration of Potentially Toxic Elements in Soils of the São Francisco Sedimentary Basin

Ferreira

Coelho

Valladares

et al. 2018

Rev. Bras. Ciênc. Solo

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Lithological and geomorphological variations determine formation of soils with different mineralogical constitutions and can influence the distribution of potentially toxic elements (PTE). The aim of this study was to determine the contents of PTE and mineralogical assemblages along soil profiles of different classes and parent materials and to investigate the association among these factors in the São Francisco sedimentary basin in the northern part of the state of Minas Gerais (Brazil). Eight soil pedons of different classes that developed from different parent materials (limestone, siltstone, phyllite, alluvial-colluvial sediments, detrital cover, and rhythmite) were studied in two lithotoposequences. Soil morphological, particle-size, and chemical analyses were carried out for soil characterization and classification. A mineralogical investigation was carried out by X-ray diffraction on soil sand, silt, and clay fractions. Potentially toxic elements were extracted by microwave-assisted acid digestion (EPA 3015A method) and determined in an ICP-OES. Soil mineralogy showed relevant interactions between pedogenesis and morphogenesis. Quartz is the main mineral in the sand and silt fractions, with varying amounts of weatherable primary minerals, whereas kaolinite is the main mineral in the clay fraction, followed by 2:1 clay minerals and oxides. The main soil properties associated with PTE variability were pH, redox environment, mineral and organic reactive surfaces, and clay content. The unique patterns of PTE distribution per pedon and differences in PTE contents in soils from the same parent material, but with different pedogenic evolution, showed that pedogenic processes influence PTE distribution. Mainly Mn, Ni, Pb, and Ba were influenced by parent material, especially limestone, siltstone, and detrital cover, but Cd, As, and Cu were also influenced. To a lesser extent, Mo was influenced by phyllite and Cr by detrital cover and phyllite. Rhodic Ferralsol (Latossolo Vermelho Distrófico típico) was the only taxonomic class to show class association with PTE. The association of Ferralsols (Latossolos) with Cd, Mn, Ni, Pb, Ba, As, and Cu and the low contents of these elements in soils of this class suggest that pedogenic processes common to Ferralsol (Latossolo) evolution are responsible for decreasing levels of these PTE.

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Teores de arsênio e cádmio em solos do bioma cerrado

Abstract: RESUMO O conhecimento do teor natural de

Cited by 12 publications

References 18 publications

Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

Natural variation of arsenic fractions in soils of the Brazilian Amazon

Mineralogy and Concentration of Potentially Toxic Elements in Soils of the São Francisco Sedimentary Basin

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