Characterization of Fe-montmorillonite: A Simulant of Buffer Materials Accommodating Overpack Corrosion Product

Kozai, Naofumi; Adachi, Y.; Kawamura, Sachi; Inada, K.; Kozaki, Tamotsu; Sato, Shunsuke; Ôhashi, Hiroshi; Ohnuki, Toshihiko; Banba, Tsunetaka

doi:10.1080/18811248.2001.9715149

Cited by 21 publications

(6 citation statements)

References 5 publications

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“…17) The value of d 001 at 40% relative humidity was 14.7 Å for Fe(II)-montmorillonite and 12.3 Å for Na-montmorillonite. These values agree well with the reported values of corresponding samples prepared by the conventional method, 4,5) which suggests that most interlayer cations were exchanged from Na þ ions to Fe(II) ions by the treatment with Fe(II)-NTA solution.…”

Section: Journal Of Nuclear Science and Technologysupporting

confidence: 91%

“…Thus, the impact of such an alteration on the montmorillonite property should be clarified through basic studies using Fe(II)-montmorillonite sample. However, available literature on Fe(II)-montmorillonite is scarce, [4][5][6][7][8][9][10][11][12] which is probably due to the anticipated difficulty in preparing samples under ambient atmospheric conditions. To date, the only reported method to obtain Fe(II)-montmorillonite samples is the cation exchange of Na-montmorillonite with a FeCl 2 solution.…”

Section: A New Methods For Fe(ii)-montmorillonite Preparation Using Fementioning

confidence: 97%

“…Therefore, the long-term integrity of the engineered barrier system including the alterability of montmorillonite under repository conditions is a key issue to be studied for the safety assessment of the HLW geological disposal. [4][5][6][7][8] The interaction of montmorillonite with the overpack (carbon steel) and its corrosion products can provide potential pathways for the alteration of montmorillonite. [4][5][6][7][8][9][10] The most probable reaction under reducing conditions is the release of Fe(II) ions from the overpack followed by the conversion of exchangeable cations of montmorillonite from Na þ to Fe(II) ions (i.e., conversion of Na-montmorillonite into Fe(II)-montmorillonite).…”

Section: A New Methods For Fe(ii)-montmorillonite Preparation Using Fementioning

confidence: 99%

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A New Method for Fe(II)-montmorillonite Preparation Using Fe(II)-nitrilotriacetate Complex

Manjanna

Kozaki

Kozai

et al. 2007

Journal of Nuclear Science and Technology

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Section: Journal Of Nuclear Science and Technologysupporting

confidence: 91%

Section: A New Methods For Fe(ii)-montmorillonite Preparation Using Fementioning

confidence: 97%

Section: A New Methods For Fe(ii)-montmorillonite Preparation Using Fementioning

confidence: 99%

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A New Method for Fe(II)-montmorillonite Preparation Using Fe(II)-nitrilotriacetate Complex

Manjanna

Kozaki

Kozai

et al. 2007

Journal of Nuclear Science and Technology

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“…It was observed that the surface of FeOOH is positively charged at a lower pH as its pH ZPC is around 7.3 18) resulting in a very high sorption of oxy anions at a lower pH. 19) In this case, Sb(III) undergoes a higher sorption on the -OH functional group of the CS surface at pH 2.8. 18) Sorption of Sb(III) on the CS surface involved two mechanisms.…”

Section: Xrd Analysis Of Sb-adsorbed Samplesmentioning

confidence: 97%

Studies on Sorption of Antimony on Carbon Steel Surface in Chemical Decontamination Medium

Mittal¹,

Bera²,

Velmurugan³

et al. 2011

Journal of Nuclear Science and Technology

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Antimony(III) in a mixed solution of nitrilo tri acetic acid, ascorbic acid, and citric acid, known as a chemical decontamination solution, was found to be deposited on a carbon steel (CS) surface under deaerated condition. The deposited antimony on the CS surface was characterized by X-ray photoelectron spectroscopy and X-ray diffraction technique. The deposited material was found to contain elemental Sb and the Fe-Sb-O compound. The characterization results showed the initial adsorption of Sb on CS and the subsequent surface precipitation of the Fe-Sb-O compound. A commercial organic inhibitor Rodine 92B was used to stop the initial adsorption of Sb(III) and further growth of the Fe-Sb-O compound on the CS surface. Nitrogen in the inhibitor was observed to act as the bridging agent between Fe and the inhibitor for growing a layer of the inhibitor that stopped the adsorption of Sb. The work has direct relevance to nuclear reactors in terms of prevention of deposition of radioactive antimony on CS surfaces during chemical decontamination.

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“…These values are in good agreement with the previously reported values. 36,37 In spent MMT-Fe 3+ , basal spacing d 001 value was almost same due to small amount of CV dye adsorbed on the surface area and hence it didn't show a significant peak using XRD analysis. As shown in Figure 3, the Fourier transform infrared (FT-IR) spectra of freshly prepared MMT-Fe 3+ is similar to that of MMT-Na.…”

Section: Characterization Of Mmt-fe 3+mentioning

confidence: 99%

Preparation and characterisation of montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral for crystal violet (CV) removal from aqueous solutions

Boudjemaa¹

2021

Rev.Roum.Chim.

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Montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral was successfully prepared using a ferric chloride precursor. The prepared sample was characterized using IR, XRD, BET and SEM-EDX. We have explored the highly efficient and environmentally benign MMT-Fe3+ for adsorption of Crystal Violet (CV) dye from aqueous solution under ambient conditions. The MMT-Fe3+ was interacted with CV dye solution at different pH, temperature and solid-to-liquid ratio. The concentration of CV dye removal was estimated from its optical density at λmax = 590 nm using UV–Vis spectrophotometer. The CV dye removal was rapid at basic pH and increases with temperature up to 40 °C. A complete reduction (100%) was occurred in about 7 min at pH 7 and 10 while at pH 3 in about 10 min. The time taken for complete reduction at 0, 30 and 40 °C are 10, 7 and 5 min respectively. The removal followed by adsorption of dye molecules on the spent nanoclay mineral was evident from SEM/EDX analysis. More importantly, MMT-Fe3+ could be separated and retrieved easily after the reaction by centrifugation from the degraded CV dye solution. The experimental results of CV dye removal from MMT-Fe3+ follows the pseudo first order kinetics. This study reveals that MMT-Fe3+ has the potential to be used as reductant/adsorbant to remove cationic pollutants effectively and rapidly from drinking water and large scale of industrial wastewater.

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Characterization of Fe-montmorillonite: A Simulant of Buffer Materials Accommodating Overpack Corrosion Product

Cited by 21 publications

References 5 publications

A New Method for Fe(II)-montmorillonite Preparation Using Fe(II)-nitrilotriacetate Complex

A New Method for Fe(II)-montmorillonite Preparation Using Fe(II)-nitrilotriacetate Complex

Studies on Sorption of Antimony on Carbon Steel Surface in Chemical Decontamination Medium

Preparation and characterisation of montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral for crystal violet (CV) removal from aqueous solutions

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