Use of the test-mineral technique to distinguish simple acidolysis from acido-complexolysis in a Podzol profile

Rompaey, Kurt Van; Ranst, Éric Van; Verdoodt, Ann; Coninck, F. De

doi:10.1016/j.geoderma.2006.08.014

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…XRD analyzes of incubated vermiculite exhibited the same general pattern, but no systematic heat pre-treatment was performed by Augusto et al (2001), thus limiting knowledge of the stability of the interlayer material. Van Rompaey et al (2007) used trioctahedral vermiculite as a test mineral incorporated into O, E and Bh horizons from podzol for three years. The same pattern of interlayer aluminization was described, and XRD analysis after heating revealed a collapse of interlayer space that was of the same order of magnitude as during the present study; no further stability was observed.…”

Section: Comparison With Interlayer Aluminization In the Natural Envimentioning

confidence: 99%

Stoichiometry of a dissolution reaction of a trioctahedral vermiculite at pH 2.7

Mareschal¹,

Ranger²,

Turpault³

2009

Geochimica et Cosmochimica Acta

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Section: Comparison With Interlayer Aluminization In the Natural Envimentioning

confidence: 99%

Stoichiometry of a dissolution reaction of a trioctahedral vermiculite at pH 2.7

Mareschal¹,

Ranger²,

Turpault³

2009

Geochimica et Cosmochimica Acta

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“…van Rompaye et al [26] (Belgium) placed Na vermiculite into the podzolic profile for three years, hor. O, E, B (pH water in hor.…”

Section: Introductionmentioning

confidence: 99%

Bentonite variations in a peaty-podzolic-gleyish soil under the field model experiment conditions

Соколова

Tolpeshta

Topunova

2013

Moscow Univ. Soil Sci. Bull.

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Changes in bentonite were estimated after having kept it in hor. T2, H, Eih, and E of peaty pod zolic gleyish (PPG) soil for 1, 3, and 5 years as part of a model field experiment. In the first variant, when montmorillonite is heated at 350°C, its X ray patterns demonstrate a diffuse scattering (1.0-1.4 nm), which is probably due to the formation of the brucite layer fragments in the interpacket gaps at the expense of mag nesium in the initial crystal lattice. When kept in the organogenic layers of soil for 3 and 5 years, it develops a considerable amount of the mineral, which does not swell after being saturated with glycerine. The diffuse scattering at 1.0-1.4 nm disappears after heating at 350°C, but the reflex at 1.0 nm during this treatment remains asymmetric with a gentle sloping towards the smaller angles θ. It can be explained by the partial dilu tion of the brucite fragments, which developed in the first year, under the conditions of an acidic medium. The changes in the diffraction pattern of hor. Eih, which took place over 1, 3, and 5 years, were similar to those in the organogenic horizons. They were caused by the same reasons as in the organogenic horizons. In the former case, however, thermodynamic measurements allow for the formation of aluminum hydroxide interlayers in the interpocket gaps of montmorillonite as its hydrocomplexes come from the superficial solu tion. In hor. E, changes in montmorillonite as a result of being kept in soil were marked only by the signs of early chloritization in the sample, which was kept in the soil for 5 years.

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“…Aluminium and Fe (oxy)hydroxides play key roles in the biogeochemical cycles of elements (Johnson & Todd, 1983), in the stabilization of organic matter and in carbon storage (Kleber et al , 2005). In addition, short‐range‐ordered Al minerals and soluble OH‐Al species can precipitate into the interlayer spaces of vermiculites and smectites, decreasing the cation exchange capacity of these phyllosilicates (Van Rompaey et al , 2007; Turpault et al , 2008) and thus altering the nutritional status of soils.…”

Section: Introductionmentioning

confidence: 99%

Seasonal dynamics of Al‐ and Fe‐bearing secondary minerals in an acid forest soil: influence of Norway spruce roots (Picea abies (L.) Karst.)

Collignon

Ranger²,

Turpault³

2012

European J Soil Science

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Aluminium (Al) and iron (Fe) play a key role in pedogenetic processes; however, short‐term changes in Al‐ and Fe‐bearing secondary minerals are little documented. In this study, Al and Fe dynamics in the solid phase have been evaluated in three soil compartments (bulk, ‘rhizosphere outer’, corresponding to soil volume detached from fresh roots, and ‘rhizosphere inner’, corresponding to soil volume detached from dried roots) and during 4 months (November, February, May and August) in an acid soil with podzolic features at its surface. Soil samples were collected from under Norway spruce (Picea abies (L.) Karst.) at three depths (0–3, 3–10 and 10–23 cm) and were sieved at 200 µm. The Al and Fe forms were extracted with different solutions: potassium chloride (AlKCl and FeKCl), oxalate (Alo and Feo), tri‐citrate (Alc) and dithionite‐citrate‐bicarbonate (Fed). The influence of spruce roots and seasons on the dynamics of Al and Fe (precipitation and dissolution reactions) was observed. The rhizosphere effect on Fed varied with sampling dates. Thus, Fed‐Feo decreased between winter and spring in the rhizosphere inner soil only (decrease of 40%). In contrast, Alc was greater in the bulk soil than in both rhizosphere soils for all seasons. The strongest variations in Al were observed at depth, especially in the bulk and the rhizosphere outer soil, where Alc‐Alo decreased drastically between winter and spring (from 50 to 60%). The seasonal dynamics of the podzolization process are discussed. This study shows that Al‐ and Fe‐bearing secondary minerals can quickly react to environmental changes, suggesting that these minerals could be markers of currently active functioning of soils.

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Use of the test-mineral technique to distinguish simple acidolysis from acido-complexolysis in a Podzol profile

Cited by 10 publications

References 22 publications

Stoichiometry of a dissolution reaction of a trioctahedral vermiculite at pH 2.7

Stoichiometry of a dissolution reaction of a trioctahedral vermiculite at pH 2.7

Bentonite variations in a peaty-podzolic-gleyish soil under the field model experiment conditions

Seasonal dynamics of Al‐ and Fe‐bearing secondary minerals in an acid forest soil: influence of Norway spruce roots (Picea abies (L.) Karst.)

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