Clays and Clay Minerals

Clays and Clay Minerals 12 records found  Search took 0.01 seconds. 
1.
9 p, 584.8 KB The role of H3O+ in the crystal structure of illite / Nieto, Fernando (Universidad de Granada. CSIC. Departamento de Mineralogía y Petrología and IACT) ; Mellini, Marcello (Universita di Siena. Dipartimento di Scienze della Terra) ; Abad, Isabel (Universidad de Jaén. Departamento de Geología)
In spite of decades of research on the subject, the crystal structure of illite is still poorly understood. The purpose of this study was to address this problem by investigating the nature of the interlayer content in illite IMt-2 from Silver Hill, Montana, using analytical transmission electron microscopy (ATEM), thermogravimetry (TG), and X-ray powder diffraction (XRPD) analyses. [...]
2010 - 10.1346/CCMN.2010.0580208
Clays and Clay Minerals, Vol. 58, Núm. 2 (2010) , p. 238-246  
2.
18 p, 2.9 MB Application of box-behnken design to modeling the effect of smectite content on swelling to hydrocyclone processing of bentonites with various geologic properties / Özgen, Selçuk (Afyon Kocatepe University. Department of Mining Engineering) ; Yildiz, Ahmet (Afyon Kocatepe University. Department of Mining Engineering)
As advances in technology have led to increased use of bentonites, more high-quality bentonite has been sought. The volume of high-quality bentonites available is shrinking and use of bentonite reserves containing impurities is inevitable. [...]
2010 - 10.1346/CCMN.2010.0580312
Clays and Clay Minerals, Vol. 58, Núm. 3 (2010) , p. 431-448  
3.
11 p, 785.8 KB Adsorption of protamine and papain proteins on saponite / Szabó, Tamás (Center for Surface Chemistry and Catalysis. K.U. Leuven) ; Mitea, Raluca (K.U. Leuven. Center for Surface Chemistry and Catalysis) ; Leeman, Hugo (K.U. Leuven. Center for Surface Chemistry and Catalysis) ; Premachandra, Gnanasiri S. (Purdue University. Department of Crop Soil and Environmental Sciences) ; Johnston, Cliff T. (Purdue University. Department of Crop Soil and Environmental Sciences) ; Szekeres, Márta (University of Szeged. Department of Colloid Chemistry and Supramolecular and Nanostructured Materials Reseach Group) ; Dékány, Imre (University of Szeged. Department of Colloid Chemistry and Supramolecular and Nanostructured Materials Reseach Group) ; Schoonheydt, Robert A. (K.U. Leuven. Center for Surface Chemistry and Catalysis)
Due to the increased importance of bionanocomposites, protamine and papain proteins were adsorbed on Na-and on Cs-exchanged saponite from aqueous solution. Protein analysis of equilibrium solutions and thermogravimetric analyses of biocomposites were used to prepare adsorption isotherms. [...]
2008 - 10.1346/CCMN.2008.0560502
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 494-504  
4.
6 p, 556.9 KB Change of the refractive index of illite particles by reduction of the Fe content of the octahedral sheet / Friedrich, Frank (Institute for Technical Chemistry - Water and Geotechnology. Division of Nanomineralogy) ; Steudel, Annett (Institute for Technical Chemistry - Water and Geotechnology. Division of Nanomineralogy) ; Weidler, Peter G. (Institute for Technical Chemistry - Water and Geotechnology. Division of Nanomineralogy)
Sub-micrometer clay particles are ofintere st in clay-polymer applications, especially when transparency is important. The scattering oflight can be reduced by the adjustment of the refractive index (RI) oft he clays to that oft he matrix. [...]
2008 - 10.1346/CCMN.2008.0560503
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 505-510  
5.
9 p, 839.9 KB Some physicochemical properties of the white sepiolite known as pipestone from Eski̇şehi̇r, Turkey / Önal, Müserref (Ankara University. Department of Chemistry) ; Yilmaz, Hamza (Ankara University. Department of Chemistry) ; Sarikaya, Yüksel (Ankara University. Department of Chemistry)
Various physicochemical characteristics of a sepiolite sample from the Eskişehir area, Turkey, were investigated to help in making predictions about possible uses of the material. The sample was examined by chemical analysis (CA), thermal analysis (DTA/TGA), X-ray diffraction (XRD) analysis, particle-size analysis (PSA), linear dilatometry (LD), scanning electron microscopy (SEM), mercury porosimetry (Hg-Por. [...]
2008 - 10.1346/CCMN.2008.0560504
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 511-519  
6.
6 p, 411.3 KB First evidence of multiple octahedral A1 sites in Na-montmorillonite by 27Al multiple quantum MAS NMR / Takahashi, Takafumi (Nippon Steel Corporation. Advanced Technology Research Laboratories) ; Kaneshashi, Koji (Nippon Steel Corporation. Advanced Technology Research Laboratories) ; Saito, Koji (Nippon Steel Corporation. Advanced Technology Research Laboratories)
The configuration of hydroxyl groups around the octahedral cations of 2:1 phyllosilicate minerals has long been an important question in clay science. In the present study, Al multiple quantum (MQ) magic angle spinning nuclear magnetic resonance (MAS NMR) was applied to the local structural analysis of octahedral Al positions in a purified Na-montmorillonite. [...]
2008 - 10.1346/CCMN.2008.0560505
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 520-525  
7.
5 p, 266.2 KB Thermodynamic properties of feroxyhyte (δ'-FeOOH) / Majzlan, Juraj (Albert-Ludwig University. Institute of Mineralogy and Geochemistry) ; Koch, Christian B. (The Royal Veterinary and Agricultural University. Department of Natural Sciences) ; Navrotsky, Alexandra (University of California at Davis. Thermochemistry Facility)
Feroxyhyte (δ'-FeOOH) is a relatively uncommon Fe oxide mineral and one of the few phases in the system FeO-HO for which thermodynamic properties are not known. In natural occurrences, it is always fine-grained, although samples with larger particle sizes and better crystallinity (labeled as δ-FeOOH) can be prepared in the laboratory. [...]
2008 - 10.1346/CCMN.2008.0560506
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 526-530  
8.
18 p, 1.5 MB Contemporary pedogenic formation of palygorskite in irrigation-induced, saline-sodic, shrink-swell soils of Maharashtra, India / Hillier, S. (Macaulay Institute) ; Pharande, A.L. (College of Agriculture)
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 to irrigation have affected the clay mineralogy. [...]
2008 - 10.1346/CCMN.2008.0560507
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 531-548  
9.
9 p, 599.6 KB Adsorption of Cr(VI) and As(V) on chitosan-montmorillonite : Selectivity and pH dependence / An, Jong-Hyok (Leibniz University of Hannover. Institute of Soil Science) ; Dultz, Stefan (Leibniz University of Hannover. Institute of Soil Science)
Montmorillonite modified with the cationic biopolymer, chitosan, has, in weak acidic solutions, protonated amine groups which act as anion-adsorption sites. Due to the specific surroundings of the adsorption sites and diffusion paths in the interlayer of chitosan-montmorillonite, preferential adsorption of certain anions is likely. [...]
2008 - 10.1346/CCMN.2008.0560508
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 549-557  
10.
13 p, 1.6 MB Smectite clay sequestration of aflatoxin B1 : Particle size and morphology / Mulder, I. (Texas A and M University. Soil and Crop Sciences Department) ; Barrientos Velazquez, A. L. (Texas A and M University. Soil and Crop Sciences Department) ; Tenorio Arvide, M.G. (Texas A and M University. Soil and Crop Sciences Department) ; White, G.N. (Texas A and M University. Soil and Crop Sciences Department) ; Dixon, J.B. (Texas A and M University. Soil and Crop Sciences Department)
The properties that might influence the sequestration of aflatoxin B (AfB) were examined. Laser-diffraction, particle-size analysis (LDPSA) indicated that the particle size of the smectite influences the amount of AfB adsorbed. [...]
2008 - 10.1346/CCMN.2008.0560509
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 558-570  
11.
8 p, 444.5 KB Smectite clay adsorption of Aflatoxin vs. octahedral composition as indicated by FTIR / Tenorio Arvide, M.G. (Texas A and M University. Soil and Crop Sciences Department) ; Mulder, I. (Texas A and M University. Soil and Crop Sciences Department) ; Barrientos Velazquez, A.L. (Texas A and M University. Soil and Crop Sciences Department) ; Dixon, J.B. (Texas A and M University. Soil and Crop Sciences Department)
The fungus Aspergillus flavus Link ex Fries can infect grains and oil seeds and develop Aflatoxin B (AfB) in the field or in storage. Aflatoxin contamination is a serious health hazard - it is extremely toxic and hepatocarcinogenic for animals and humans. [...]
2008 - 10.1346/CCMN.2008.0560510
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 571-578  
12.
17 p, 707.8 KB Mineralogy and genesis of smectites in an alkaline-saline environment of Pantanal wetland, Brazil / Furquim, Sheila Aparecida Correia (Universidade de São Paulo) ; Graham, Robert C. (University of California. Soil and Water Sciences Program) ; Barbiero, Laurent (Universté de Toulouse) ; de Queiroz Neto, José Pereira (Universidade de São Paulo) ; Vallès, Vincent (Université d'Avignon et des Pays du Vaucluse)
Smectite formation in alkaline-saline environments has been attributed to direct precipitation from solution and/or transformation from precursor minerals, but these mechanisms are not universally agreed upon in the literature. [...]
2008 - 10.1346/CCMN.2008.0560511
Clays and Clay Minerals, Vol. 56, Núm. 5 (2008) , p. 579-595  

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