Relationship Between Magnetization and Trace Elements Content of Brazilian Soils From Different Parent Materials.

Oliveira, Teógenes Senna de; Fontes, Maurício Paulo Ferreira; Costa, Liovando Marciano da; Horn, Adolf Heinrich

doi:10.1097/00010694-200010000-00007

Cited by 15 publications

(19 citation statements)

References 10 publications

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“…Studies have shown that soils derived from itabirite may have either low (Curi and Franzmeier, 1987) or high TE contents Costa et al, 2014); therefore, generalizations regarding TE contents and parent material should be avoided. Close correlations exist between values of magnetic susceptibility (χ LF ) and TE concentrations (Figure 8C and D), as reported by Oliveira et al (2000), due to the greater concentrations of these elements in ferrimagnetic minerals (magnetite, maghemite and intermediate phases). Along with the significant correlations observed between TE contents in coarse fractions and in the clay fraction, the results support the genesis pathway of superparamagnetic particles from multidomain magnetic particles cited above.…”

Section: Geochemistrysupporting

confidence: 81%

“…Despite variations in different soil fractions, when observed the magnetic sand fraction for example, with the highest (8,252 mg kg ) values for the LV 9 (tuffite) and LV 11 (itabirite), respectively, the general distribution of the total heavy metal contents in the soil was identified (Figure 7). It suggested a clear relationship with the parent material, as reported in previous studies (Curi and Franzmeier, 1987;Ferreira et al, 1994;Oliveira et al, 2000;Marques et al, 2004;Cervi et al, 2014;Costa et al, 2014).…”

Section: Geochemistrysupporting

confidence: 80%

“…Despite a consensus on the relationship between magnetic minerals and TE in soils, Oliveira et al (2000) highlighted that this relationship is not observed for Fe-rich soils developed on itabirite. However, considerable contents of Cd, Cr, Ni, Zn and Cu may occur in the magnetic fractions of these soils.…”

Section: Introductionmentioning

confidence: 95%

“…Oxisols cover more than 50 % of Minas Gerais State in Brazil and soils developed on basalt, tuffite and itabirite deserve attention because they are Fe-rich with high magnetic susceptibility (Ferreira et al, 1994;Fontes et al, 2000;Oliveira et al, 2000;Costa et al, 2014;Camêlo et al, 2017). These soils have high contents of hematite, maghemite and/or titanomaghemite in the clay fraction and significant amounts of magnetite and/ or titanomagnetite in silt and sand fractions, resulting in high magnetic susceptibility in the Fe-rich Rhodic Oxisols (Soil Taxonomy -Soil Survey Staff, 2014) (Fontes and Weed, 1991;Fabris et al, 1997a, b;.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic minerals are known as important sources of trace elements (TE) in soils (Krauskopf, 1972;Ferreira et al, 1994;Oliveira et al, 2000;Cervi et al, 2014;Costa et al, 2014). Despite a consensus on the relationship between magnetic minerals and TE in soils, Oliveira et al (2000) highlighted that this relationship is not observed for Fe-rich soils developed on itabirite.…”

Section: Introductionmentioning

confidence: 99%

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Mineralogy, magnetic susceptibility and geochemistry of Fe-rich Oxisols developed from several parent materials

Camêlo

Ker

Fontes

et al. 2018

Sci. agric. (Piracicaba, Braz.)

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Fe-rich Oxisols on mafic rocks in Brazil generally have high magnetic susceptibility with high contents of some trace elements. These are taxonomically similar soils; however, differences in magnetic and geochemical properties may affect agricultural or environmental usability and subsequent management. This study investigated the pedogenesis of Fe-rich Oxisols from various parent materials and evaluated the lithogenetic influence on magnetic susceptibility and trace elements contents. Soil samples were collected from Bw horizons in 13 Rhodic Oxisols and a Typic Oxisol developed from several parent materials in Minas Gerais State, Brazil. Soils were analyzed by X-ray diffractometry (XRD) and magnetometry. Soil chemical analyses consisted of sulfuric and total (tri-acid) digestions and selective Fe oxides dissolutions and statistical correlations were determined. Fe-rich Oxisols presented a typical mineralogical composition of highly weathered soils with structural stability. The results confirm the difficulty to identify accurately magnetic minerals in different grain sizes using XRD. However, coarse fractions still exert dominant influence on the magnetic properties of the Fe-rich Rhodic Oxisols. In addition, coarse fractions probably contribute to the enrichment of superparamagnetic particles for the clay fraction. Although highly weathered, Fe-rich Oxisols may have their geochemical attributes still controlled by the parent material, where trace elements seem to be correlated with the magnetic minerals in the coarse fractions. Thus, the natural replacement of some trace elements from soil-solution equilibrium reactions during plant development could be more effective in soils with higher magnetic particles concentrations in the coarse fractions.

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Section: Geochemistrysupporting

confidence: 81%

Section: Geochemistrysupporting

confidence: 80%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mineralogy, magnetic susceptibility and geochemistry of Fe-rich Oxisols developed from several parent materials

Camêlo

Ker

Fontes

et al. 2018

Sci. agric. (Piracicaba, Braz.)

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The paleohydrological context of the Iron Age floodplain sites of the Mun River Valley, Northeast Thailand1

2007

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Many Iron Age sites on the flood plain of the Mun River in northeast Thailand are encircled by channels commonly known as "moats." Also, the sites are closely associated with complex paleochannels of the river. A comparison between the seemingly human-constructed moats and paleochannels provided an opportunity to assess the relationship between prehistoric human settlement and paleohydrological conditions. In this study, the results of physical, sedimentological, and geochemical analyses are used to characterize sediments deposited within the channels around the Iron Age site of Ban Non Wat and within a paleochannel at nearby Ban Non Ngiu. This allowed us to test the results of previous research that has suggested significant changes in the floodplain hydrology and the geoarchaeologically important conclusion that Iron Age human activity was associated with one particular paleohydrological phase. Our analyses broadly confirm the results of previous stratigraphic studies, but add detail regarding sedimentation processes. The evidence indicates that there are significant sedimentological differences within the complex of archaeological channel features, differences that provide critical evidence for the formation and sedimentation processes of the channels. More importantly, comparison between the archaeological features and the natural channel fills highlights the relationships between the archaeological sites and landscape. Drawing also on previously published chronological, geomorphological, and stratigraphical data, it is possible to place the sites into a floodplain hydrological regime that may have been unique to the Iron Age. Specifically, the moats may have been constructed in response to enhanced water availability on the floodplain. The sites, therefore, may reflect a human response to increased availability of water beyond the main river channels. This water supply, however, appears to have been short-lived (centuries at most), and with its loss, the human adaptation to this enhanced natural resource became unviable.

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Enrichment and solubility of trace metals associated with magnetic extracts in industrially derived contaminated soils

Wang

Chen

2012

Environ Geochem Health

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Magnetic fractions (MFs) in industrially derived contaminated soils were extracted with a magnetic separation procedure. Total, soluble, and bioaccessible Cr, Cu, Pb and Zn in the MFs and non-magnetic fractions (NMFs) were analyzed using aqua regia and extraction tests, such as deionized water, toxicity characteristic leaching procedure (TCLP), and gastric juice simulation (GJST) test. Compared with the non-magnetic fractions, soil MFs were enriched with Fe, Mn, Pb, Cd, Cr, Cu, and Ni. Extraction tests indicated that soil MFs contained higher water, TCLP, and GJST-extractable Cr, Cu, Pb, and Zn concentrations than the soil NMFs. The TCLP-extractable Pb concentration in the MFs exceeded the USEPA hazardous waste criteria, suggesting that soil MFs have a potentially environmental pollution risk. Solubility of trace metals was variable in the different extraction tests, which has the order of GJST > TCLP > water. TCLP test showed Cu and Zn were more mobile than Cr and Pb while bioaccessibility of trace metal defined by GJST test showed the order of Cu ≈ Cr ≈ Zn > Pb. These findings suggested that the MFs in the industrially derived contaminated soils had higher possibility of polluting water bodies, and careful environmental impact assessment was necessary.

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Relationship Between Magnetization and Trace Elements Content of Brazilian Soils From Different Parent Materials.

Cited by 15 publications

References 10 publications

Mineralogy, magnetic susceptibility and geochemistry of Fe-rich Oxisols developed from several parent materials

Mineralogy, magnetic susceptibility and geochemistry of Fe-rich Oxisols developed from several parent materials

The paleohydrological context of the Iron Age floodplain sites of the Mun River Valley, Northeast Thailand1

Enrichment and solubility of trace metals associated with magnetic extracts in industrially derived contaminated soils

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