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Browsing ELibrary by Title
Now showing items 11463-11482 of 21934
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(1998)Pb(II) sorption on goethite and γ-alumina was studied in aqueous 0.1 M NaCl solutions as a function of pH (5-7), sorption density (1.2-5 μmoles/m2), and [Pb]T (0.24-4.53 mM) using XAFS (X-ray absorption fine structure) ...
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(1998)Sulfate adsorbed to hematite surfaces from aqueous solution is examined using Fourier transform infrared (FTIR) spectroscopy and scanning tunneling microscopy (STM). FTIR was carried out using an Attenuated Total Reflectance ...
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(2001)The effective dissolution rates of gypsum are determined by mixed kinetics, where the rate constants of dissolution at the surface and the transport constant of molecular diffusion of dissolved material are similar. To ...
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(2004)In order to elucidate mechanisms of seismo-electromagnetic phenomena such as earthquake luminosity, earth potential changes, electromagnetic radiation and ionosphere disturbances, numerous fracture or frictional slip tests ...
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(1996)Adsorption or enrichment of trace elements in the near-surface or interfacial regions of minerals has been documented in systems ranging from low-temperature aqueous environments to magmas. Under static conditions, this ...
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(1997)Adsorption studies of aromatic hydrocarbons of various molecular sizes on organo-clays in aqueous solution were carried out for characterizing the surface heterogeneity of organo-clays. Benzene, toluene, p-xylene, ethylbenzene ...
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(2004)Primary homologization of wing venation is of crucial importance in taxonomic studies of fossil and recent insects, with implications for large-scale phylogenies. Homologization is usually based on relative relief of veins ...
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(2003)The gold-decoration technique of electron microscopy is used to study the surface microtopography of natural (001) surfaces of sudoite collected from a hydrothermal vein of the Berezovsk gold deposit, Central Urals, Russia. ...
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(2004)In a recent paper, Ballentine and Barfod [Earth Planet Sci. Lett. 180 (2000) 39–48] emphasize the general existence of an atmospheric noble gas component closely resembling modern air in glass samples of Mid-Ocean Ridge ...
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(2003)We characterized the surface oxidation on layer (~50 Å) of chalcocite reacted with air-saturated aqueous solutions at pH = 2-11 and with the ambient atmosphere. Copper L-edge and O K-edge X-ray absorption spectroscopy ...
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(2003)X-ray absorption and emission spectra were used to characterize the surface of chalcopyrite after oxidation both in air and in air-saturated aqueous solution (pH = 2-10). For chalcopyrite oxidized in aqueous solution, the ...
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(2003)The nature of the surface oxidation phase on pyrite, FeS2, reacted in aqueous electrolytes at pH = 2 to 10 and with air under ambient atmospheric conditions was studied using synchrotron-based oxygen K edge, sulfur LIII ...
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(2003)In this study, Urban Unit Hydrographs (URBS-UHs), are derived from the analysis of an urban databank for three urban catchments with surface areas ranging from 18 to 180ha. The geometry of property lots, streets and sewer ...
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(2000)High-resolution, in situ X-ray reflectivity measurements were made of the calcite (104)-water interface in calcite-saturated aqueous solutions at pH values ranging from 6.8 to 12.1 and low PCO2. The X-ray reflectivity data, ...
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(2003)Many theoretical models predict that arrested dykes may generate major grabens at rift-zone surfaces. Arrested dyke tips in eroded rift zones, however, are normally not associated with major grabens or normal faults that ...
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(2003)The atomic and electronic structure of mineral surfaces affects many environmentally important processes such as adsorption phenomena. They are however rarely considered relevant to dissimilatory bacterial reduction of ...
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(2001)Hydrologists and water resources managers who work in areas that receive a significant portion of the annual precipitation in the form of snowfall rely on good approximates of snow accumulation in order to assess snowpack ...
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(1996)Surface charge and UO22+ adsorption were measured on a clay-sized, subsurface mineral isolate whose mineralogy was dominated by a ferrogenous beidellite. Experiments were performed in batch at 25°C with N2(g) atmosphere ...
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(2001)Many organic compounds depress the surface tension of water relative to their aqueous concentration. These surface-active organic solutes have been shown to cause water flow in unsaturated porous media. Flow in these systems ...
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(2002)Focuses on the uses of mineral crystals. Importance of physical properties of minerals on the diagnostic uses of mineral; Composition and crystal structure of minerals; Process of biomineralization by organisms. INSET: ...
Now showing items 11463-11482 of 21934