Topic
Kaolinite
About: Kaolinite is a research topic. Over the lifetime, 8545 publications have been published within this topic receiving 224537 citations. The topic is also known as: myelin.
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TL;DR: In contrast to what is commonly assumed, the constant pH rates are not independent of chemical affinity at far from equilibrium conditions as mentioned in this paper, rather, the logarithm of these rates for albite and kaolinite are linear functions of aqueous Al concentration over wide ranges of saturation states.
469 citations
TL;DR: In this paper, a series of geopolymer composites were prepared containing 10−20% of various granular inorganic fillers ranging from waste demolition materials through mineral tailings to engineering ceramics.
454 citations
TL;DR: In this paper, the sorption of three hydrophobic organic compounds (HOC) was investigated on hematite and kaolinite that had been coated with natural humic substances over a mass percent carbon range of 0.01-0.5%.
Abstract: The sorption of three hydrophobic organic compounds (HOC) was investigated on hematite and kaolinite that had been coated with natural humic substances over a mass percent carbon range of 0.01-0.5%. Increasing quantities of sorbed humic substances increased the sorption of HOC. Anthracene, the most hydrophobic HOC, showed the greatest sorption enhancement, while the most aromatic coating, peat humic acid, was the strongest sorbent. Depending on the type of humic acid coating and the mineral substrate, the experimental K{sub oc} values were either higher or lower than those predicted by the K{sub ow}. The sorptivity of a given humic acid for HOC was not the same on kaolinite and hematite, suggesting that the orientation and structure of the humic substance on the mineral may affect the surface area of the organic phase and the accessibility of hydrophobic domains that control HOC sorptivity. Sorption isotherms for HOC on the humic-coated mineral substrates were nonlinear, implying that the sorption phenomenon was adsorption onto rather than partitioning into the surface organic phase.
451 citations
TL;DR: In this paper, the relationship between the microstructure and engineering properties of cement-treated marine clay was examined using x-ray diffraction, scanning electron microscopy, pH measurement, mercury intrusion porosimetry, and laser diffractometric measurement of the particle size distribution.
Abstract: This paper examines the relationship between the microstructure and engineering properties of cement-treated marine clay. The microstructure was investigated using x-ray diffraction, scanning electron microscopy, pH measurement, mercury intrusion porosimetry, and laser diffractometric measurement of the particle size distribution. The engineering properties that were measured include the water content, void ratio, Atterberg limit, permeability, and unconfined compressive strength. The results indicate that the multitude of changes in the properties and behavior of cement-treated marine clay can be explained by interaction of four underlying microstructural mechanisms. These mechanisms are the production of hydrated lime by the hydration reaction which causes flocculation of the illite clay particles, preferential attack of the calcium ions on kaolinite rather than on illite in the pozzolanic reaction, surface deposition and shallow infilling by cementitious products on clay clusters, as well as the presence of water trapped within the clay clusters.
451 citations
TL;DR: In this paper, experiments were carried out to investigate the sorption of the complete lanthanide series (Ln or rare earth elements, REE) on a kaolinite and an a Na-montmorillonite at 22°C over a wide range of pH (3-9).
422 citations