Organic complexation and translocation of ferric iron in podzols of the Negro River watershed. Separation of secondary Fe species from Al species

Fritsch, Emmanuel; Allard, Thierry; Benedetti, Marc F.; Bardy, Marion; Nascimento, Nivaldo Ferreira do; Li, Y.; Calas, Georges

doi:10.1016/j.gca.2009.01.008

Cited by 57 publications

(53 citation statements)

References 50 publications

(92 reference statements)

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“…Two major groups of processes have been proposed to explain Podzol formation (podzolization): (a) creation and downward transport of complexes of organic acids with Al and Fe; and (b) silicate weathering followed by downward transport of Al and Si as inorganic colloidal sol (Lundsröm et al 2000). The portion of "organic" or "inorganic" complexes in transport process and their formation, precipitation, adsorption or degradation were the object of numerous studies (Lundström et al 2000;Farmer & Lumsdon 2001;Fritsch et al 2009Sanborn et al 2011).…”

mentioning

confidence: 99%

“…The organic matter content, its quality and mobilization play an important role in weathering of minerals and transfer of metal ions (Fritsch et al 2009. The organic matter chemical structure may vary not only within the soil profile but also within the area depending on the horizontal water fluxes (Fritsch et al 2009;Bardy et al 2011).…”

mentioning

confidence: 99%

“…The organic matter chemical structure may vary not only within the soil profile but also within the area depending on the horizontal water fluxes (Fritsch et al 2009;Bardy et al 2011). The impact of climate on soil organic matter properties was documented by Pereverzev (2011).…”

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confidence: 99%

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Study of podzolization process under different vegetation cover in the Jizerské hory Mts. region.

Nikodem¹,

Pavlů²,

Kodešová³

et al. 2013

Soil & Water Res.

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The development of Podzols is conditioned by many factors. One of them is vegetation cover. The aim of this study was to examine in detail special chemical properties, micromorphological features and water retention ability of Podzols under two different vegetation covers (spruce forest and grass). The study was performed in the Jizerské hory Mts., which were strongly influenced by atmospheric acidificant depositions in the past. The study was focused on the assessment of a 30-year grass amelioration impact on soils on the former forest land. It was shown that larger differences in the studied chemical properties (pH KCl 2+ and Al 3+ species) were in the surface organic horizons and decreased with depth. Podzolization intensity was higher under the spruce forest than under the grass cover. Higher amounts of potentially dangerous Al forms were detected in the soils under the spruce forest than under the grass. Grass expansion on clear-cut areas (former forest) as a natural amelioration step results in the particular restoration of soil conditions. The micromorphological features studied on the soil thin sections using the optical microscope and soil water retention curves measured on the undisturbed 100 cm 3 soil samples showed a significant influence of the organic matter presence on the soil structure and retention ability of H and Bhs horizons. Soil under the grass cover had denser structure (e.g. greater fraction of small capillary pores) and higher retention ability than soil under the spruce forest. Very similar retention curves were measured in the Ep and Bs horizons under both vegetation covers. Micromorphological features studied on the thin soil sections clearly documented a podzolization mechanism (e.g. organic material transport and its accumulation, weathering process and Fe oxidation and mobilization).

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Study of podzolization process under different vegetation cover in the Jizerské hory Mts. region.

Nikodem¹,

Pavlů²,

Kodešová³

et al. 2013

Soil & Water Res.

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“…O principal processo de diferenciação que ocorre na Amazônia é a Podzolização, que vem sendo estudada por diversos autores (Lucas et al 1988;Lucas et al 1998;Lundström et al, 2000, Nascimento et al 2004Montes et al 2007;Nascimento et al 2008;Fritsch et al 2009;Montes et al 2011;Lucas et al 2012;Pereira et al 2015), em que os Espodossolos se desenvolvem com o tempo a partir de solos argilosos (Pereira et al 2015).…”

Section: Revisão Bibliográfica 2017unclassified

“…Além disso, a condição úmida proporciona uma grande mobilidade ao ferro, devido às condições redutoras, viabilizando o transporte desse elemento pelo lençol freático até os horizontes superficiais (Nascimento et al, 2004;Fritsch, 2009). …”

Section: Revisão Bibliográfica 2017unclassified

Gênesis de espodossolos amazônicos: um estudo sobre a estrutura e a mobilidade da matéria orgânica

Tadini¹

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Spatiotemporal dynamics in soil iron affected by wetland conversion on the Sanjiang Plain

et al. 2021

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Since the 1950s, nearly 80% of wetlands in the Sanjiang Plain have been converted into paddy fields. The conversion might affect the solubility and mobility of soil iron, influencing the export of iron into the Amur River and the primary production of the Okhotsk Sea. However, information regarding long-term studies of the spatiotemporal dynamics of soil iron after cultivation is limited. In this study, six regions, including 18 plots in the Sanjiang Plain, were selected as sampling sites covering natural wetlands and paddy fields with planting ages of 2, 5, 11, 18, and 25 years after conversion from the wetland. Samples were collected at six different depths (0-10, 10-20, 20-40, 40-60, 60-90, and 90-120 cm) analyzed for water-soluble ferrous iron (Fe [II]), water-soluble iron (Fe w ), complex iron (Fe p ), amorphous iron oxides (Fe o ), free iron oxides (Fe d ), and total iron (Fe t ) and six soil physicochemical characteristics. Two years after the conversion of wetlands to rice fields led to an immediate decrease in Fe(II), Fe w , Fe p /Fe d , and Fe o /Fe d , while the Fe p and Fe o contents decreased at 5 years. Both the concentrations and stocks of soil Fe t increased gradually during the

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Organic complexation and translocation of ferric iron in podzols of the Negro River watershed. Separation of secondary Fe species from Al species

Cited by 57 publications

References 50 publications

Study of podzolization process under different vegetation cover in the Jizerské hory Mts. region.

Study of podzolization process under different vegetation cover in the Jizerské hory Mts. region.

Gênesis de espodossolos amazônicos: um estudo sobre a estrutura e a mobilidade da matéria orgânica

Spatiotemporal dynamics in soil iron affected by wetland conversion on the Sanjiang Plain

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