Natural Mordenite from Spain as Pozzolana
Molecules, 2020 This work deals with anomalous concentrations of natural mordenite in the southeast of Spain. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies evidenced that the samples contain mainly monomineral zeolitic phase of mordenite (70%
Leticia Presa +3 more
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Modelling environmental factors correlated with podoconiosis: a geospatial study of non-filarial elephantiasis [PDF]
, 2014 Introduction The precise trigger of podoconiosis — endemic non-filarial elephantiasis of the lower legs — is unknown. Epidemiological and ecological studies have linked the disease with barefoot exposure to red clay soils of volcanic origin ...
Atkinson, Peter M +6 more
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Cap rock efficiency of geothermal systems in fold-and-thrust belts: Evidence from paleo-thermal and structural analyses in Rosario de La Frontera geothermal area (NW Argentina) [PDF]
, 2016 Cap rock characterization of geothermal systems is often neglected despite fracturing may reduce its efficiency and favours fluid migration. We investigated the siliciclastic cap rock of Rosario de La Frontera geothermal system (NW Argentina) in order to
Aldega, L. +7 more
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Cerâmica, 1999 The adsorption of sulphuric acid on smectite from acidic aqueous solutions was studied. The amounts of cations dissolved in each equilibrium solution were determined by chemical analysis.
E. L. Tavani, C. Volzone
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Modification of smectite structure by sulfuric acid and characteristics of the modified smectite [PDF]
Journal of Agricultural Sciences (Belgrade), 2011 Bentonite samples from Petrovac and Aleksinac were treated with sulfuric acid of different molarities. Differences in structure and texture of the initial and modified bentonite were determined by chemical analysis and Xraypowder diffraction (XRPD ...
Tomić Zorica P. +5 more
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Charge Heterogeneity in Smectites
Clays and Clay Minerals, 1983 AbstractThe heterogeneity of sites for Ca→K exchange was examined by microcalorimetry in the <0.2-μm fractions of some selected smectites. Six groups of sites, ranging in exothermic exchange enthalpy (-d(ΔHx)/dx) from 5.7 to 10.9 kJ/eq were identified.
Talibudeen, O., Goulding, K. W. T.
openaire +1 more source
MAPPING REMOVAL SWELLING CLAY SOILS IN THE AURES (N’GAOUS) ALGERIA [PDF]
Analele Universităţii din Oradea: Seria Geografie, 2016 The shrinkage and swelling phenomena of certain clay soils cause differential settlement manifested by disorders that affect mainly the individual frame. The objective of this research was to create a map related to these phenomena especially in the area
Rahmani MOUNA +2 more
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The signature of river- and wind-borne materials exported from Patagonia to the southern latitudes: a view from REEs and implications for paleoclimatic interpretations [PDF]
, 2004 Riverine and wind-borne materials transferred from Patagonia to the SW Atlantic exhibit a homogeneous rare earth element (REE) signature. They match well with the REE composition of Recent tephra from the Hudson volcano,and hence this implies a ...
Bidart, Susana M. +4 more
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PHYSICO-CHEMICAL PROPERTIES OF MONTMORILLONITE CLAYS AND THEIR APPLICATION IN CLINICAL PRACTICE (REVIEW) [PDF]
Research Results in Pharmacology, 2017 The review is devoted to the medical application of montmorillonite clay minerals. Properties and mechanisms of action of enterosorbents. The properties of the enterosorbents include an absorption capacity and active surface.
Anton Tishin +4 more
doaj +3 more sources
The origin of alteration “orangettes” in Dhofar 019: Implications for the age and aqueous history of the shergottites [PDF]
, 2017 The shergottites are the largest group of Martian meteorites, and the only group that has not been found to contain definitive evidence of Martian aqueous alteration.
Hallis, L.J. +3 more
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