Results 101 to 110 of about 10,713 (180)
Chemically modified smectites [PDF]
Clay Minerals, 2003 AbstractThis paper summarizes recent results obtained on chemical modifications of smectites. These include replacement of exchangeable cations with protons, a process connected with smectite autotransformation – attack of protons on the layers and liberation of central atoms from the octahedral and tetrahedral sheets, causing modification of the acid ...
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The effect of smectite on the corrosion of iron metal
, 2012 The combination of zero-valent iron (ZVI) and a clay-type amendment is often observed to have a synergistic effect on the rate of reduction reactions. In the present study, electrochemical techniques were used to determine the mechanism of interaction ...
Jones-Landry, Elise F. +5 more
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Potassium fixation in soil size fractions of arid soils
Soil and Water Research, 2013 Amounts of potassium (K) fixed in soil fractions of 10 calcareous soils of southern Iran were measured to evaluate the contributions of different soil size fractions to K fixation.
Mahdi NAJAFI-GHIRI, Ali ABTAHI
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Determination of chemical formula of a smectite
Communications, Faculty Of Science, University of Ankara Series B Chemistry and Chemical Engineering, 2006 Smectites are dominant clay minerals in bentonites. Each of montmorillonite, beidelite, nontronite, hectorite and saponite minerals is a member of smectite group. They are valuable mineral class for industrial applications because of their high cation exchange capacities, surface area, surface reactivity, adsorptive capacity and catalytic activity ...
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Geological evidence of smectite longevity
, 1990 Two differently heated and loaded bentonite layers, one of Miocenic age from central Sardinia, and one of Ordovician age from southern Gotland, Sweden, have been investigated with respect to mineralogy, granulometry, microstructure and physical ...
Karnland, Ola, Pusch, Roland
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Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl [PDF]
Journal of the Serbian Chemical Society, 2006 The Cretaceus-Tertiary (KT) boundary at Stevns Klint (the Højerup succession), Fiskeler, consists of a thin red clay layer overlain by a thick one of black marl. These two layers are made up mainly from cheto-smectite and biogenic calcite. The black marl
PAVLE I. PREMOVIC +5 more
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, 2017 The excess of orbital detection of smectite deposits compared to carbonate deposits on the martian surface presents an enigma because smectite and carbonate formations are both favored alteration products of basalt under neutral to alkaline conditions ...
Agresti, D. G. +6 more
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, 2018 The stability of a shale containing smectite with different exchangeable cations (Na+, Ca2+) was improved using optimum solutions containing polyether amine (PA), poly-alcohol (PO) or KCl.
Shifeng Zhang +4 more
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, 2010 The structure-building phenomena within clay aggregates are governed by forces acting between clay particles. Measurements of such forces are important to understand in order to manipulate the aggregate structure for applications such as dewatering of ...
Zbik, Marek, Frost, Ray L.
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Polymer‐clay nanocomposite hydrogels with multiple responses to multiple stimuli
Responsive MaterialsHydrogels are widely studied for their stimuli‐responsive properties. They adapt to external stimuli, including physical, chemical and biological ones. To enhance adaptability in complex environments, multi‐responsive hydrogels have been developed, which
Ploypailin Milin Saengdet, Makoto Ogawa
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