Properties of red Oxisols on calcareous sedimentary rocks in Thailand

Tawornpruek, Saowanuch; Kheoruenromne, Irb; Suddhiprakarn, A.; Gilkes, Robert

doi:10.1016/j.geoderma.2006.04.022

Cited by 13 publications

(5 citation statements)

References 28 publications

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“…9) falls on the kaolin composition line whereas the matrix has an Al 2 O 3 /SiO 2 ratio consistent with the dominantly kaolin/illite mineralogy of the soil determined by XRD. This result suggests that the nodules are exogenous and have been derived from a purely kaolinitic soil, these soils are common in adjacent upland regions (Tawornpruek et al, 2006). The Carich composition of nodules in the Ck horizon of Lop Buri series indicates that they are almost pure calcite whereas the matrix consists of a mixture of clay minerals with lesser calcite (Fig.…”

Section: Depth Variation In Chemical Compositionmentioning

confidence: 89%

The geochemistry of Thai paddy soils

et al. 2008

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Section: Depth Variation In Chemical Compositionmentioning

confidence: 89%

The geochemistry of Thai paddy soils

et al. 2008

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“…This scenario can be related to the low clay content in these soils, as well as the probable predominance of minerals containing a small amount of permanent charge such as kaolinite, which provide high dependence of organic matter in the CEC. Tawornpruek et al (2006) also observed a relationship between CEC variations in depth with soil organic carbon content.…”

Section: Chemical Attributesmentioning

confidence: 68%

“…In addition, the increase of pH in the subsurface horizons of soils may be associated with the presence of iron oxides and the adsorption of H + ions at the soil colloids (Buol et al, 2011). The pH values in KCl show a similar tendency in the profile, but with a unit lower than that of the pH in water, indicating a predominance of acid cations (Al 3+ and H + ) at exchange sites (Tawornpruek et al, 2006).…”

Section: Chemical Attributesmentioning

confidence: 96%

Genesis of sandstone-derived soils in the Cerrado of the Piauí State, Brazil

et al. 2019

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This study characterized the morphological, physical and chemical attributes of sandstone-derived soils at the Cerrado of the Piauí State, Brazil, in order to identify evolutionary standards. The study was carried out with five representative soil profiles identified as P1-RY (Typical Flavic Psychotic Neosol - Aquents), P2-PA (Typical Dystrophic Yellow Argisol - Alfisol), P3-RL (Fragmentary Litholic Distrophic Neosol - Psammenit), P4-RQ (Typical Ortic Quartzenetic Neosol - Orthents) and P5-PV (Typical Dystrophic Red Argisol - Ultisol). Soil samples were submitted laboratory analysis described morphologically. In general, the soils presented high sand content, low pH, low content of exchangeable bases and low cation exchange capacity (CEC). Organic matter governed the CEC in most cases, suggesting dependence of organic matter in the supply of charges. These soils showed a low degree of weathering, but with iron of high crystallinity. Thus, the relief and the parent material are the major important soil-forming factors at the Cerrado of the Piauí State. Moreover, these soils are young, with the soils from the Piauí Formation being more evolved. However, the sandstones from the Canindé Group apparently are providing lithological secondary minerals for the soil.

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“…Fe, an ubiquitous element in natural and anthropic materials, is of special interest because Fe minerals (i) are reported to be reliable and well-accepted markers of soil evolution in soil sciences and (ii) control to a large extent the distribution and mobility of trace metals in soils, especially in the absence of Mn species (Bakker et al, 1996;Buol et al, 1973;Uzarowicz and Skiba, 2011). The slow transformation of primary Fe-bearing silicates in oxic and well-drained conditions lead to Fe depletion and precipitation of Fe (hydr)oxides such as goethite, lepidocrocite, ferrihydrite or magnetite (Bakker et al, 1996;Tawornpruek et al, 2006). Formation of free Fe (hydr)oxides can lead to the coating of soil particles with a thin film of these Fe (hydr)oxides (Ben-Dor et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Evolution of iron minerals in a 100 years-old Technosol. Consequences on Zn mobility

et al. 2017

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International audienceThe prediction of the long term trace element mobility in anthropogenic soils would be a way to anticipate land management and should help in reusing slightly contaminated materials. In the present study, iron (Fe) and zinc (Zn) status evolution was investigated in a 100-year old Technosol. The site of investigation is an old brownfield located in the Nord-Pas-de-Calais region (France) which has not been reshaped since the beginning of the last century. The whole soil profile was sampled as a function of depth, and trace elements mobility at each depth was determined by batch leaching test. A specific focus on Fe and Zn status was carried out by bulk analyses, such as selective dissolution, X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS). Fe and Zn status in the profile samples was also studied using laterally resolved techniques such as μ-particle induced X-ray emission (μ-PIXE) and μ-Rutherford backscattering spectroscopy (μ-RBS). The results indicate that (i) Fe is mainly under Fe(III) form, except a minor contribution of Fe(II) in the deeper samples, (ii) some Fe species inherited from the past have been weathered and secondary minerals are constituted of metal-bearing sulphates and Fe (hydr)oxides, (iii) ferrihydrite is formed during pedogenesis (iv) 20 to 30% more Fe (hydr)oxides are present in the surface than in depth and (v) Zn has tetrahedral coordination and is sorbed to phases of increasing crystallinity when depth increases. Zn-bearing phases identified in the present study are: complex Fe, Mn, Zn sulphides, sulphates, organic matter, and ferrihydrite. Soil formation on such material does not induce a dramatic increase of Zn solubility since efficient scavengers are concomitantly formed in the system. However, Technosols are highly heterogeneous and widely differ from one place to another. The behavior examined in this study is not generic and will depend on the type of Technosol and on the secondary minerals formed as well as on the nature and amount of organic matter

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Properties of red Oxisols on calcareous sedimentary rocks in Thailand

Cited by 13 publications

References 28 publications

The geochemistry of Thai paddy soils

The geochemistry of Thai paddy soils

Genesis of sandstone-derived soils in the Cerrado of the Piauí State, Brazil

Evolution of iron minerals in a 100 years-old Technosol. Consequences on Zn mobility

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