Browsing by Subject "Montmorillonite"

Browsing by Subject "Montmorillonite"

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  • Clays and Clay Minerals, Vol. 54, No. 1, 12-4, 2006. 
    Breiner, Joan M.; Anderson, Michael A.; Tom, Harry W.K.; Graham, Robert C. (The Clay Minerals Society, 2006)
    Abstract -- The reactivity of colloidal particles is regulated by their surface properties. These properties affect the wettability, flocculation-dispersion characteristics, ion exchange, sorption capacities and transport ...
  • Clays and Clay Minerals, Vol. 54, No. 1, 62-66, 2006. 
    Dogan, A. Umran; Dogan, Meral; Onal, Muserref; Sarikaya, Yuksel; Aburub, Aktham; Wurster, Dale Eric (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    Specific surface area measurements of The Clay Minerals Society source clays were made by the Brunauer, Emmett and Teller (BET) method of adsorption of nitrogen gas. Two replicate measurements of specific surface area were ...
  • Clays and Clay Minerals, Vol. 54, No. 2, 195-208, 2006. 
    Lee, Kangwon; Kostka, Joel E.; Stucki, Joseph W. (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    The reduction of structural Fe in smectite is mediated either abiotically, by reaction with dithionite, or biotically, by Fe-reducing bacteria. The effects of abiotic reduction on clay-surface chemistry are much better ...
  • Clays and Clay Minerals, Vol. 54, No. 2, 209-219, 2006. 
    Daehn, Rainer; Jullien, Michel; Scheidegger, Andre M.; Poinssot, Christopher; Baeyens, Bart; Bradbury, Michael H. (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    The aim of this work was to investigate whether neoformed Ni-phyllosilicates can be observed and identified using transmission electron microscopy (TEM) in combination with energy dispersive spectroscopy (EDS). The ...
  • Clays and Clay Minerals, Vol. 54, No. 3, 351-362, 2006. 
    Proust, D.; Caillaud, J.; Fontaine, C. (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    The early stages of amphibole weathering result in the crystallization of several clay mineral species: tri- and dioctahedral smectites, interstratified dioctahedral kaolinite-smectite (K-S), and halloysite. Each clay ...
  • Clays and Clay Minerals, Vol. 54, No. 3, 363-374, 2006. 
    Bourg, Ian C.; Sposito, Garrison; Bourg, Alain C.M. (The Clay Minerals SocietyThe Clay Minerals Society, 2006)
    Compacted Na-bentonite clay barriers, widely used in the isolation of solid-waste landfills and other contaminated sites, have been proposed for a similar use in the disposal of high-level radioactive waste. Molecular ...
  • Clays and Clay Minerals, Vol. 54, No. 5, 616-625, 2006. 
    Varadachari, Chandrika (The Clay Minerals SocietyThe Clay Minerals Society, 2006-09)
    This paper presents a novel concept in the thermodynamic derivation of phase diagrams for clay minerals that incorporates fuzzy transition zones. This new technique yields phase diagrams that have graded (fuzzy) zones of ...
  • Clays and Clay Minerals, Vol. 55, No. 1, 71–88, 2007. 
    Saha, Uttam Kumar; Kozak, L. M.; Huang, P. M. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The citrate-induced desorption kinetics of pre-adsorbed Se from montmorillonite (Mt) and its complexes with hydroxyaluminum (HyA-Mt) and hydroxyaluminosilicate (HAS-Mt) were studied. The mole fraction of pre-adsorbed Se ...
  • Clays and Clay Minerals, Vol. 55, No. 2, 160–164, 2007. 
    Rouse, Jason H.; Ferguson, Gregory S. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    X-ray diffraction has been used to study the sorption of water by multilayer films containing ordered stacksof alternating layersof an organic polyelectrolyte and individual plateletsof a smectite. The position and shape ...
  • Clays and Clay Minerals, Vol. 55, No. 2, 189–199, 2007. 
    Kyle, Jennifer E.; Schroeder, Paul A. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    A siliceous sinter collected from Octopus Spring in Yellowstone National Park, USA contains an occluded volcanic rock fragment that has undergone alteration. The sinter piece beyond the fragment is mostly dominated by ...
  • Clays and Clay Minerals, Vol. 55, No. 4, 348–353, 2007. 
    Okada, Tomohiko; Ehara, Yusuke; Ogawa, Makoto (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The adsorption of Eu3+ from aqueous solution to natural Na+-montmorillonite (Kunipia F), synthetic saponite (Sumecton SA) and synthetic fluoro-tetrasilicic mica (Na+-TSM) clay samples was investigated. Adsorption capacities ...
  • Clays and Clay Minerals, Vol. 55, No. 5, 534–541, 2007. 
    Dogan, Meral; Dogan, A. Umran; Yesilyurt, F. Irem; Alaygut, Dogan; Buckner, Ira; Wurster, Dale Eric (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The Clay Minerals Society published a complete characterization scheme for its ‘Source Clays’ but not for its ‘Special Clays’. To address this issue, the specific surface areas (SSAs) of the 16 special clays from The Clay ...
  • Clays and Clay Minerals, Vol. 56, No. 2, 190–206, 2008. 
    Kosakowski, Georg; Churakov, Sergey V.; Thoenen, Tres (The Clay Minerals SocietyThe Clay Minerals Society, 2008)
    The state and dynamics of water and cations in pure and mixed Na-Cs-montmorillonite as a function of the interlayer water content were investigated in the present study, using Monte Carlo and classical, molecular-dynamics ...
  • Clays and Clay Minerals, Vol. 56, No. 5, 531–548, 2008. 
    Hillier, S.; Pharande, A. L. (The Clay Minerals SocietyThe Clay Minerals Society, 2008)
    Increasing use of irrigation in India has exacerbated the problems of soil salinity and sodicity. The present study was undertaken on shrink-swell soils from Maharastra State to determine if changes in soil chemistry due ...
  • Clays and Clay Minerals, Vol. 57, No. 1, 104–114, 2009. 
    Emmerich, Katja; Wolters, Felicitas; Kahr, Guenter; Lagaly, Gerhard (The Clay Minerals Society, 2009)
    Montmorillonites, with the general composition M+ x(Si4-yAly)[(Al,Fe3+)2-z(Mg,Fe2+)z] O10(OH)2 where x = x = 0.2-0.6, x = y+z, and y<<z, vary widely in composition and structure. The commonly used classification into fivemon ...
  • Clays and Clay Minerals, Vol. 57, No. 1, 115–133, 2009. 
    Wolters, Felicitas; Lagaly, Gerhard; Kahr, Guenter; Nueesch, Rolf; Emmerich, Katja (The Clay Minerals Society, 2009)
    The term ‘montmorillonite’ encompasses a wide range of chemical compositions and structures. Comprehensive and reliable characterization is essential for unambiguous classification. Twenty eight purified, Na-exchanged ...
  • Clays and Clay Minerals, Vol. 57, No. 1, 40–45, 2009. 
    Seiffarth, Torsten; Kaps, Christian (The Clay Minerals SocietyThe Clay Minerals Society, 2009)
    Abstract—Bentonites are excellent materials for sequestering various metal cations because of the cation fixation ability of the constituent montmorillonite layers, but sometimes, such as in the case of Cu2+, th e exact ...
  • Clays and Clay Minerals, Vol. 57, No. 2, 150–160, 2009. 
    Morodome, Shoji; Kawamura, Katsuyuki (The Clay Minerals Society, 2009)
    Abstract—The effects of temperature on the swelling properties of smectites are important for a variety of different geological conditions, but studies on this topic have been rather limited. The purpose of this study was ...
  • Clays and Clay Minerals, Vol. 57, No. 4, 433–443, 2009. 
    Bachir, Cherifa; Lan, Yanhua; Mereacre, Valeriu; Powell, Annie K.; Koch, Christian Bender; Weidler, Peter G (The Clay Minerals Society, 2009)
    Pillared clays (PILCs) with magnetic properties are materials with potential for wide application in industry and the environment, but only a few studies of these types of materials have been carried out. The purpose of ...
  • Clays and Clay Minerals, Vol. 58, No. 2, 164–173, 2010. 
    Aouad, Amina; Anastacio, Alexandre S.; Bergaya, Faiza; Stucki, Joseph W. (The Clay Minerals SocietyThe Clay Minerals Society, 2010)
    The placement of metal oxide pillars between clay mineral layers modifies their physicalchemical properties, including surface area, acidity, and catalytic activity. Aluminum is the most commonly used pillar cation, but ...