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clay
clay common name for a number of fine-grained, earthy materials that become plastic when wet. Chemically, clays are hydrous aluminum silicates, ordinarily containing impurities, e.g., potassium, sodium, calcium, magnesium, or iron, in small amounts. Properties and Classification Properties of the... Read more |
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boulder clay
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red clay
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flocculation
flocculation The process in which particles in a colloid aggregate into larger clumps. Flocculation of clay particles in soil can be induced by the addition of calcium salts. Clay particles have an overall negative charge and therefore attract positive ions, such as Ca2+, which form bridges holding... Read more |
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William L. Sr. Clay
William Lacy Clay 1931– ... Read more |
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podzolization
podzolization (podsolization) An advanced stage of leaching, podzolization is the process of the removal of iron and aluminium compounds, humus, and clay minerals from the surface soil horizons by an organic leachate solution, and the deposition of some of these translocated materials in lower B... Read more |
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Vertisols
Vertisols Mineral soils, an order of soils that contain more than 30 per cent by weight swelling clay (e.g. montmorillonite), and that expand when wet and contract when dry to produce a self-inverting soil and an undulating (gilgai) microrelief. Vertisols are associated with seasonally wet and dry... Read more |
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china clay
china clay one of the purest of the clays, composed chiefly of the mineral kaolinite usually formed when granite is changed by hydrothermal metamorphism . Usage of the terms china clay and kaolin is not well defined; sometimes they are used synonymously for a group of similar clays, and... Read more |
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clay mineral
clays are one of mankind's oldest raw materials, used for making pottery since Neolithic times. The plasticity of clays enables them to be shaped; firing then converts them into rigid, impermeable articles which can be used in cooking and other purposes. Modern society uses a wide range of clays,... Read more |
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pencil
pencil pointed implement used in writing or drawing to apply graphite or a similar colored solid to any surface, especially paper. From prehistoric times lumps of colored earth or chalk were used as markers. The Egyptians ruled lines with metallic lead, as did medieval monks. The so-called lead... Read more |
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Epoxy + montmorillonite nanocomposite: Effect of composition on reaction...
...effects of montmorillonite layered silicates...of smectic clays hold promise...generates negative charges that are normally...replaced by ion exchange reaction with...hydrophilic silicate surface ... |
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Formation and structure of organized molecular films for organo-modified...
...to undergo ion exchange which makes...modify their surfaces by intercalation...modified clays) have been...modified clay composites...modified clays can act as...platelet surface and the degree...whether the ... |
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Photocatalytic decolourization of the X3B textile dye in aqueous solutions...
...e.g., montmorillonite (MMt...negative charge (Morlat...cation-exchange process was...effect of clay on the pollutants...modified clays for the degradation...water on the surface of MMt...bearing clays could ... |
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Prospecting paydirt.(Clay nanoparticles enhance polymers)
...layers of montmorillonite, a layered...s nylon-clay composite...nanometer level. Clay particles...possibilities: Clay fillers were...montmorillonite clays for nanocomposites...provide high surface areas ... |
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Nanoscale imaging of molecular adsorption.
...their use as ion-exchange materials...that cationic clays preferentially...molecules on clays may be related...of layered clays, local characterization...a layered clay, hydrotalcite...overall 2+ charge per ... |
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Prospecting paydirt
...layers of montmorillonite, a layered...s nylon-clay composite...nanometer level. Clay particles...possibilities: Clay fillers were...montmorillonite clays for nanocomposites...provide high surface areas ... |
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Effect of clay/water ratio during bentonite clay organophilization on the...
...has been montmorillonite, the main...bentonite clays (2). Economic...consisting clay minerals, such as montmorillonite (major constituent...minerals (3). Montmorillonites are 2:1...shared oxygen ions. The unit...negative ... |
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Use of bentonite to control the release of copper from contaminated...
...large specific surface area, low...and has high surface area and cation exchange capacity...expandable montmorillonite clay; the...net negative charges on clay surfaces (Zhu et al...2005). ... |
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Nanoclays make polymers stronger: polymer clay nanocomposites considerably...
...Polymer clay nanocomposites...large specific surface area of about...generates negative charges that are counterbalanced...cations. The exchanges with cationic...alkylammonium ions, increase...reduce the surface energy ... |
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Sorption of uranium, strontium and cesium on pozzolan
...good ion-exchange capacity and...the zeolite surface. Sinha et...studied the ion-exchange behavior of thorium ions with four different...mostly through ion exchange...the thorium ... |
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