Global distributions of Fe, Al, Cu, and Zn contained in Earth's derma layers

Rauch, Jason N.

doi:10.1016/j.gexplo.2011.05.008

Cited by 10 publications

(6 citation statements)

References 42 publications

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“…Such variations may be related to the types of source material (Fig. 1d) (Rauch, 2011), relief (Fig. 1b) (Kravchenko and Bullock, 2002;Siqueira et al, 2010a) and soil ( Fig.…”

Section: Three-dimensional Analysis: Variability Maps and Digital Elementioning

confidence: 99%

Detailed mapping unit design based on soil–landscape relation and spatial variability of magnetic susceptibility and soil color

Siqueira

Marques

Pereira

et al. 2015

CATENA

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The objective was to identify landscape areas with different patterns of variability using a statistic protocol with data of magnetic susceptibility (MS) and soil color that are covariate attributes of soil formation factors and processes. The studied area, of 380 ha, is located in Northeast of São Paulo State, Brazil. An amount of 86 samples was collected using 30 m intervals on the transect. At the transect sides, 150 samples were collected at 159 m intervals (a point each 2.5 ha). First the accuracy limits have been validated in the transect using the technique of Split Moving Windows-SMW. The limits identified in the transect were extrapolated to the sides using the contours of variability maps. The MS peaks SMW, for both depths, presented a correlation with the peaks of clay content (r = 0.7; P b 0.01), hue (varying from 0:37; P b 0.05 to 0.61; P b 0.01) and Normalized Difference Vegetation Index-NDVI (varying from − 0.25 to − 0.35, P b 0.05). The errors of the MS spatial variability maps (6.22-11.85%) were similar to the clay content ones (6:22 to 14:16%). MS was more efficient in the compartmentalization of the landscape (identification of areas with different patterns of variability) than the hue determined by diffuse reflectance spectroscopy in Oxisols under the transition Basalt and Colluvial-Elluvial-Alluvial Deposits. The results of this study can lead to using an alternative strategy that is a mapping of soil attributes and identification of areas with different patterns of pedogenic iron oxide variability.

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“…Such variations may be related to the types of source material (Fig. 1d) (Rauch, 2011), relief (Fig. 1b) (Kravchenko and Bullock, 2002;Siqueira et al, 2010a) and soil ( Fig.…”

Section: Three-dimensional Analysis: Variability Maps and Digital Elementioning

confidence: 99%

Detailed mapping unit design based on soil–landscape relation and spatial variability of magnetic susceptibility and soil color

Siqueira

Marques

Pereira

et al. 2015

CATENA

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“…Such changes can be related to differences in the original materials ( Fig. 2b and d) (Rauch, 2011), relief (Fig. 2a) (Daniels et al, 1970;Kravchenko and Bullock, 2002;Camargo et al, 2013;Marques Jr. et al, 2014) and cultivation practices (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Such relationships can be established from large-scale (national, continental and world) maps (White et al, 1997;Rauch, 2011). Also, medium-scale maps encompassing states and municipalities can be useful to define areas of deficiency or toxicity of specific chemical elements (White and Zasoski, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Such studies, often conducted in small areas representing major regions , enable to obtain more reliable and accurate results with lower costs. In addition, it is known that the spatial continuity of the soil formation factors such as geology, landscape, among others can influence the spatial distribution of the soil attributes (Franzen et al, 2006;Rauch, 2011). Therefore it is extremely important to define sampling schedules that consider the variability inferred by these factors.…”

Section: Introductionmentioning

confidence: 99%

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Sampling planning of micronutrients and aluminium of the soils of São Paulo, Brazil

Marques

Alleoni²,

Teixeira

et al. 2015

Geoderma Regional

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“…Iron is the fourth most abundant element in the earth's crust, with an average concentration of about 5.09 mass%. 1,2 Iron minerals in the medium have been shown to have a significant impact on various geochemical and environmental processes. 3,4 Recent studies have shown that Fe(II)-containing minerals can activate oxygen to produce reactive oxygen species (ROS).…”

Section: Introductionmentioning

confidence: 99%

Effect of Interfacial Action on the Generation and Transformation of Reactive Oxygen Species in Tripolyphosphate-Enhanced Heterogeneous Fe₃O₄/O₂ Systems

Zhang,

Kong,

Tratnyek

et al. 2024

Environ. Sci. Technol.

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It has been reported that tripolyphosphate (TPP) can enhance the oxygenation of natural Fe(II)-containing minerals to produce reactive oxygen species (ROS). However, the molecular structure of the TPP-Fe(II) mineral surface complex and the role of this complex in the generation and transformation of ROS have not been fully characterized. In the present study, a heterogeneous magnetite (Fe 3 O 4 )/O 2 /TPP system was developed for the degradation of p-nitrophenol (PNP). The results showed that the addition of TPP significantly accelerated the removal of PNP in the Fe 3 O 4 /O 2 system and extended the range of effective pH to neutral. Experiments combined with density functional theory calculations revealed that the activation of O 2 mainly occurs on the surface of Fe 3 O 4 induced by a structural Fe(II)-TPP complex, where the generated O 2•− (intermediate active species) can be rapidly converted into H 2 O 2 , and then the •OH generated by the Fenton reaction is released into the solution. This increases the concentration of •OH produced and the efficiency of •OH produced relative to Fe(II) consumed, compared with the homogeneous system. Furthermore, the binding of TPP to the surface of Fe 3 O 4 led to stretching and even cleavage of the Fe−O bonds. Consequently, more Fe(II)/(III) atoms are exposed to the solvation environment and are available for the binding of active O 2 and O 2•− . This study demonstrates how common iron minerals and O 2 in the natural environment can be combined to yield a green remediation technology.

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Global distributions of Fe, Al, Cu, and Zn contained in Earth's derma layers

Cited by 10 publications

References 42 publications

Detailed mapping unit design based on soil–landscape relation and spatial variability of magnetic susceptibility and soil color

Detailed mapping unit design based on soil–landscape relation and spatial variability of magnetic susceptibility and soil color

Sampling planning of micronutrients and aluminium of the soils of São Paulo, Brazil

Effect of Interfacial Action on the Generation and Transformation of Reactive Oxygen Species in Tripolyphosphate-Enhanced Heterogeneous Fe₃O₄/O₂ Systems

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Global distributions of Fe, Al, Cu, and Zn contained in Earth's derma layers

Cited by 10 publications

References 42 publications

Detailed mapping unit design based on soil–landscape relation and spatial variability of magnetic susceptibility and soil color

Detailed mapping unit design based on soil–landscape relation and spatial variability of magnetic susceptibility and soil color

Sampling planning of micronutrients and aluminium of the soils of São Paulo, Brazil

Effect of Interfacial Action on the Generation and Transformation of Reactive Oxygen Species in Tripolyphosphate-Enhanced Heterogeneous Fe3O4/O2 Systems

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Product

Resources

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Effect of Interfacial Action on the Generation and Transformation of Reactive Oxygen Species in Tripolyphosphate-Enhanced Heterogeneous Fe₃O₄/O₂ Systems