The Chemistry of Clay-Organic Reactions. 1975

Theng, B. K. G.

doi:10.1097/00010694-197608000-00010

Cited by 130 publications

(185 citation statements)

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“…The patterns of dry and wet montmorillonite are also shown for comparison. Water molecules can evidently expand the basal spacing of montmorillonite, and the value of 1.86 nm corresponds to an interlayer structure with three water pseudo-layers [37,38]. 0.2 CEC times of CTMA intercalation can further slightly expand the basal spacing (to 1.92 nm), and it is retained at the beginning of the aging process.…”

Section: Basal Spacing Evolution Of Omtmentioning

confidence: 99%

Expansion characteristics of organo montmorillonites during the intercalation, aging, drying and rehydration processes: Effect of surfactant/CEC ratio

Zhu

Wang

Zhu

et al. 2011

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Basal Spacing Evolution Of Omtmentioning

confidence: 99%

Expansion characteristics of organo montmorillonites during the intercalation, aging, drying and rehydration processes: Effect of surfactant/CEC ratio

Zhu

Wang

Zhu

et al. 2011

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Smectite clay minerals are used as catalysts and catalyst supports because they have relatively high surface areas and abundant surface acid sites [24,25]. Smectites containing transition metal ions can be tailored for specific catalytic applications [26].…”

Section: Catalytic Properties Of Smectitesmentioning

confidence: 99%

Geomaterials: their application to environmental remediation

Yamada

Tamura

Watanabe

et al. 2011

Science and Technology of Advanced Materials

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Geomaterials are materials inspired by geological systems originating from the billion years long history of the Earth. This article reviews three important classes of geomaterials. The first one is smectites-layered silicates with a cation-exchange capacity. Smectites are useful for removing pollutants and as intercalation compounds, catalysts and polymer nanocomposites. The second class is layered double hydroxides (LDHs). They have an anion-exchange capacity and are used as catalysts, catalyst precursors, sorbents and scavengers for halogens. The third class of geomaterials is zeolites-microporous materials with a cation-exchange capacity which are used for removing harmful cations. Zeolite composites with LDHs can absorb ammonium and phosphate ions in rivers and lakes, whereas zeolite/apatite composites can immobilize the radioactive iodine. These geomaterials are essential for environmental remediation.

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“…Various studies on the adsorptivity of Mont have been reported and studies of adsorption of inorganic ions, such as Pb and Cd, and organic compounds, such as amines and pyrazines, have been conducted (Abollino et al, 2003;Barbier et al, 2000;Ogawa et al, 1989Ogawa et al, , 1991Theng, 1974). Cesium adsorptivity, in particular, has been receiving much attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Influence of hydrophilicity on adsorption of caffeine onto montmorillonite

Yamamoto

Shiono

Yoshimura

et al. 2017

Adsorption Science & Technology

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Some types of montmorillonite containing different interlayer ions were prepared and the changes in the interlayer spacings, the hydrophilicity, and the characteristics of adsorption of caffeine in solution were observed. Ion exchange treatments were performed using Li, Na, K, Rb, Cs, Mg, Ca, Sr, or Ba. As a result, Li-and Na-type montmorillonite showed larger interlayer distance (1.31-1.53 nm), than K, Rb, and Cs-type montmorillonite (1.23-1.26 nm). In the measurement of hydrophilicity using a pulse NMR-based particle interface analyzer, Li-and Na-type montmorillonite showed higher hydrophilicity. In addition, K Lang , which indicates the interaction with caffeine, was 0.25-0.32 l/mmol, which is lower than K-, Rb-, and Cs-type montmorillonite (1.14-1.60 l/mmol). It is possible that adsorption of water molecules inhibits caffeine from adsorbing. Because of the difficulty of exchange between caffeine and water molecules in interlayer of the Li-and Na-type montmorillonite, the interaction with caffeine decreased. Alternatively, another possibility is that when highly hydrophilic montmorillonite retains many water molecules, the caffeine adsorption sites are blocked by water molecules. In either case, hydrophilicity has a large influence on the adsorption of caffeine onto montmorillonite.

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The Chemistry of Clay-Organic Reactions. 1975

Cited by 130 publications

References 0 publications

Expansion characteristics of organo montmorillonites during the intercalation, aging, drying and rehydration processes: Effect of surfactant/CEC ratio

Expansion characteristics of organo montmorillonites during the intercalation, aging, drying and rehydration processes: Effect of surfactant/CEC ratio

Geomaterials: their application to environmental remediation

Influence of hydrophilicity on adsorption of caffeine onto montmorillonite

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