Iron-rich clay mineral synthesis using design of experiments approach

Boumaïza, Hella; Dutournié, Patrick; Meins, Jean‐Marc Le; Limousy, Lionel; Brendlé, Jocelyne; Martin, Christelle; Michau, Nicolas; Dzene, Līva

doi:10.1016/j.clay.2020.105876

Cited by 7 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their results and the current study are also in agreement with previous findings (Boumaiza et al, 2020). Those authors showed that among three synthesis parameters, namely, time, temperature, and initial OH/Fe molar ratio, the last named (and consequently the pH) had the most important effect on the final synthesis product.…”

Section: Discussionsupporting

confidence: 93%

“…thermodynamics) but also on the respective formation kinetics, influenced by the temperature (activation energy). This conclusion is in agreement with the conclusions reached in a previous study (Boumaiza et al, 2020), in which the kinetics of 2:1 clay mineral formation was faster than for 1:1 clay mineral formation. Thus, the experiment at higher temperature would have faster kinetics and favor the formation of 2:1 phyllosilicates.…”

Section: Introductionsupporting

confidence: 93%

See 1 more Smart Citation

Characterization of Iron-Rich Phyllosilicates Formed at Different Fe/Si Ratios

Dzene

Dutournié

Brendlé

et al. 2022

Clays and clay miner.

Self Cite

View full text Add to dashboard Cite

The formation of 2:1 and 1:1 phyllosilicates in Fe–Si–O–H systems occurs in various geological and engineering settings; however, the identification and characterization of these minerals is very challenging due to the limited amount that is accessible, the very small particle size, and often the large degree of heterogeneity of these samples. To overcome these drawbacks, the synthesis of iron-rich phyllosilicates was attempted in this study with an initial Fe/Si molar ratio ranging from 0.50 to 2.33. The synthesis was performed at 150°C under hydrothermal conditions over a period of 7 days. Synthesis products were characterized by X-ray diffraction and fluorescence, by infrared, Raman, and Mössbauer spectroscopies, and by transmission electron microscopy. Results revealed that the stability field of the 2:1 clay mineral was wider than that of the 1:1 clay mineral. The 2:1 clay mineral was less sensitive to redox conditions compared to the 1:1 clay mineral. In addition, a heterogeneity of phases formed (iron oxides, nontronite, cronstedtite, or greenalite) was identified.

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Introductionsupporting

confidence: 93%

Characterization of Iron-Rich Phyllosilicates Formed at Different Fe/Si Ratios

Dzene

Dutournié

Brendlé

et al. 2022

Clays and clay miner.

Self Cite

View full text Add to dashboard Cite

show abstract

Influence of pH on the Hydrothermal Synthesis of Al-Substituted Smectites (Saponite, Beidellite, and Nontronite)

Criouet,

Viennet,

Baron

et al. 2023

Clays and clay miner.

View full text Add to dashboard Cite

Smectitic clay minerals are unique indicators of paleoenvironmental conditions and exhibit a unique reactivity in the mineral world. Smectites may exhibit tetrahedral substitutions (Al3+, and sometimes Fe3+, can substitute for Si4+ in tetrahedral sites), resulting in a layer-charge increase, thereby impacting their properties (e.g. swelling and sorption capacities, catalytic properties, expandable abilities). The objective of the present study was to determine the influence of pH conditions on the hydrothermal production of smectite end-members exhibiting tetrahedral Al substitutions (saponite, beidellite, and nontronite), using X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) methods. The results of a series of syntheses conducted at various pH values allowed discussion of the crystallization pathways of these smectites from a mechanistic point of view. Altogether, the present study provided easily reproducible protocols for the hydrothermal production of pure saponite, nontronite, or beidellite (i.e. with no other mineral). The successful synthesis of pure saponite was achieved by exposing the starting gels to 230°C for 4 days in solutions at pH ranging from 5.5 to 14. The successful synthesis of pure beidellite was achieved by exposing the starting gels to 230°C for 9 days in a solution at pH 12. The successful synthesis of pure nontronite was achieved by exposing the starting gels to 150°C for 2.5 days in a solution at pH 12.5. Although extrapolating experimental results to natural settings remains difficult, the results of the present study may be of great help to constrain better the geochemical conditions existing or having existed on extraterrestrial planetary bodies.

show abstract

Clay mineral products for improving environmental quality

Worasith

Goodman

2023

Applied Clay Science

View full text Add to dashboard Cite

Iron-rich clay mineral synthesis using design of experiments approach

Cited by 7 publications

References 34 publications

Characterization of Iron-Rich Phyllosilicates Formed at Different Fe/Si Ratios

Characterization of Iron-Rich Phyllosilicates Formed at Different Fe/Si Ratios

Influence of pH on the Hydrothermal Synthesis of Al-Substituted Smectites (Saponite, Beidellite, and Nontronite)

Clay mineral products for improving environmental quality

Contact Info

Product

Resources

About