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

Mareschal, Louis; Ranger, Jacques; Turpault, M.-P.

doi:10.1016/j.gca.2008.09.036

Cited by 28 publications

(9 citation statements)

References 53 publications

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“…The unit formulas of vermiculite reported by Argüelles et al (2010) and in agreement with previous reports (De la Calle et al, 1977, 1978and De La Calle and Suquet, 1988, Mareschal et al, 2009and Marcos et al, 2003 have layer charges of 0.82 and 0.80 per O 10 (OH) 2 , respectively, resulting from Al-for-Si substitutions in the tetrahedral sheet. This vermiculite is mainly Mg 2+ -saturated in the interlayer corresponding to almost 0.4 interlayer cations per O 10 (OH) 2 .…”

Section: Materials Description and Sample Preparationsupporting

confidence: 90%

Measurement of the elastic properties of swelling clay minerals using the digital image correlation method on a single macroscopic crystal

Hedan

Hubert

Prêt

et al. 2015

Applied Clay Science

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Section: Materials Description and Sample Preparationsupporting

confidence: 90%

Measurement of the elastic properties of swelling clay minerals using the digital image correlation method on a single macroscopic crystal

Hedan

Hubert

Prêt

et al. 2015

Applied Clay Science

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“…As a result, peak at 1.40-1.43 nm may be observed; however, it was shifted to lower values for higher loadings of iron oxide: 1.39 and 1.37 nm for S3 and S4, respectively. Described phenomenon is a result of partial dehydration of the interlayer gallery and formation of so-called HIV-hydroxy-interlayered vermiculites [31,32]. Similar shift was observed also for the sample with the highest nano-hematite content: HS3-1.39 nm.…”

Section: Characterization Of As Received and Spent Catalystssupporting

confidence: 69%

Removal of Phenol from Wastewater Using Fenton-Like Reaction over Iron Oxide–Modified Silicates

Węgrzyn¹

2017

Physico-Chemical Wastewater Treatment and Resource Recovery

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Iron-containing active phase was deposited on natural layered silicate (vermiculite) using several techniques such as ion exchange, precipitation, and forced hydrolysis during hydrothermal digestion. Tuning of the synthesis conditions resulted in preparation of the catalysts with different loading of active phase and physicochemical properties. The composite materials were characterized with respect to their structure (X-ray diffraction), agglomeration state of Fe (diffuse reflectance UV-vis spectroscopy), and chemical composition. Catalytic tests were performed in semi-batch reactor under atmospheric pressure. Aqueous solution of phenol was used as a model industrial effluent, and hydrogen peroxide was added as an oxidant. Spectral techniques were used for identification of intermediate oxidation products. Spent catalysts were also characterized, and structural and chemical changes were determined, e.g., leaching degree of active phase.

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“…Apart from the concept of intercalation of Al provided by the soil solution and its subsequent partial polymerization, 'autoaluminization' was proposed by several authors (e.g., Vicente et al, 1977;Robert et al, 1979;Mareschal et al, 2009;Viennet et al, 2015Viennet et al, , 2016 as another process of interlayer formation. It requires partial dissolution of phyllosilicates favored by a decrease in soil pH (e.g., Barnhisel and Bertsch, 1989), for instance in the rhizosphere (e.g., Hinsinger et al, 1993).…”

Section: Structure Of Himsmentioning

confidence: 99%

Review Article. What are the nature and formation conditions of hydroxy‐interlayered minerals (HIMs) in soil?

Georgiadis

Dietel

Dohrmann

et al. 2019

J. Plant Nutr. Soil Sci.

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Primary minerals of the parent material undergo weathering during the formation of terrestrial soils to varying extent. As a result, secondary minerals develop, which comprise, among many others, hydroxy-interlayered minerals (HIMs). These minerals have formed by interlayering of hydroxy-metal complexes (especially of Al 3+ , also Mg 2+ , Fe 2+/3+ ) into micas, expansible 2:1 phyllosilicates and forming oligomers, or by weathering of primary chlorite. The degree of interlayer filling and the stability of these fillings affect several physico-chemical soil properties, for instance the cation exchange capacity. Although many studies have been conducted on formation, occurrence, and properties of HIMs in soil during the last decades, several challenges still exist. These challenges include analytical identification and quantification of HIMs in soil, the nature of the interlayer filling and the identification of favorable conditions in soil for the formation of HIMs. In order to deepen the understanding of formation, properties, and fate of HIMs in soil, we critically reviewed the available literature. Based on the review, we recommend using a new structural model that enables quantification of hydroxy-interlayered smectite in soil by X-ray diffractometry, laboratory experiments on the formation and preservation of different types of interlayers and considering the temporal and spatial dimension of the formation of HIMs in soil in more detail.

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

Cited by 28 publications

References 53 publications

Measurement of the elastic properties of swelling clay minerals using the digital image correlation method on a single macroscopic crystal

Measurement of the elastic properties of swelling clay minerals using the digital image correlation method on a single macroscopic crystal

Removal of Phenol from Wastewater Using Fenton-Like Reaction over Iron Oxide–Modified Silicates

Review Article. What are the nature and formation conditions of hydroxy‐interlayered minerals (HIMs) in soil?

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