Showing papers in "Applied Clay Science in 2002"

TL;DR: In this paper, methylene blue was adsorbed on kaolin from a local deposit and the adsorption data could be fitted by the Freundlich and Langmuir equations.

TL;DR: The beneficial effects for human health of clay minerals are examined, describing their use in pharmaceutical formulations, spas and aesthetic medicine, and their applications in aesthetic medicine.

TL;DR: In this paper, the effect of the divalent organic cations (DQ, PQ, Diquat, DQ and MG) on the cation exchange capacity (CEC) of sepiolite was investigated with an adsorption model.

TL;DR: In this article, the effect of exchangeable cations on the infrared spectra of water in MX-80 bentonite compacted from high salinary salt solution systems was studied using self-supporting film and attenuated total reflection (ATR) techniques.

TL;DR: In this article, a batch equilibrium test was conducted on kaolinite suspensions that had been adjusted to pH 4 and pH 6, with varying concentrations of Pb (as PbCl2) and Cd (as CdCl2).

TL;DR: The mineralogy of a bentonite from Miles, Queensland, Australia, before and after acid treatment (by reflux in 53 M HCl at 80 °C) has been assessed by IR, XRD and chemical analysis as mentioned in this paper.

TL;DR: In this paper, the adsorption isotherms of dicamba on calcined-LDH are typical S-type curves, suggesting a hydrophobic adaption mechanism was involved.

TL;DR: In this paper, the adsorption of the cationic surfactant hexadecyltrimethylammonium (HDTMA) by kaolinite and halloysite was studied.

TL;DR: In this paper, four different cationic polymers that varied in chemical type, cation density and molecular weight were reacted with a Wyoming bentonite ( + and no Ca 2+, polycations displaced most exchangeable Na + from the clay at low loadings, but only displaced most of the exchangeable Ca 2 + at quite high loadings (up to 2 g polymer g −1 clay). Clay-polymer reactions were largely completed at quite low polymer/clay ratios, although the poly-diallyldimethylammonium chloride (poly-DAD

TL;DR: In this article, the mineralogy of clay-rich mineral matter isolated from a range of Australian bituminous coals has been evaluated in quantitative terms from X-ray powder diffraction patterns using a Rietveld-based data processing technique.

TL;DR: In this paper, the essential properties of the bentonite with respect to the building materials are discussed. And the results of recent developments for improving the material properties of bentonite containing mineral sealing mixtures are presented followed by a conclusive outlook to the further possible developments.

TL;DR: In this article, the influence of iron and titanium containing impurities on the properties of two Indian kaolins and their calcined products is discussed, and two Indian calcined samples were analysed for their optical properties, pH, true and apparent densities and particle size distribution.

TL;DR: In this paper, two very different illitic-chloritic clays (calcareous and non-calcous), both currently used in the Italian brickmaking industry, were used.

TL;DR: In this article, the mineralogical changes in bentonite in contact with synthetic pore waters of cements were studied and the temperature effect has been taken into account in order to consider the thermal impact of radioactive decay.

TL;DR: In this paper, a Triassic clay deposit was qualitatively and quantitatively investigated by means of X-ray diffraction (XRD), thermal analysis (DTA-TG), infrared spectroscopy, gravimetry and analytical methods.

TL;DR: In this article, the authors measured polarized infrared (IR) and polarized ultraviolet-visible light (UV-VIS) absorption spectra for cationic laser dyes, rhodamine 6G (R6G) and oxazine 4 (Ox4), incorporated in an oriented film of synthetic fluoromica (Li taeniolite, LiTN) to determine the orientation of dye molecules in the interlayer space.

TL;DR: In this article, three methods for measuring the amount of montmorillonite in 10 bentonite samples are described and evaluated based on certain assumptions that usually result in analyses of low accuracy.

TL;DR: In this article, the response of water repellency to added clays dominated by kaolin or smectite was investigated for 23 highly water- repellent sandy soils from the West Midland Sandplains, Western Australia.

TL;DR: In this paper, the fly ash zeolites (FAZ) component is aimed at improving the retention or at least the retardation properties of the sorptive zone or sorptive geotextile element especially for nonpolar organic molecules and of course, heavy metals.

TL;DR: In this paper, the authors investigated the chemical-mineralogical features of clay sediments outcropping around the town of Ferrara, paying particular attention to their fine fraction (grain size X-ray fluorescence (XRF) analyses indicate that the abundance of transition trace elements such as Cr and Ni is positively correlated with MgO wt.

TL;DR: In this article, the effects of freeze-thaw on microstructure of clayey soils and soil-bentonite mixtures in relation to changes of the permeability and the shear strength were investigated.

TL;DR: In this paper, the differences occurring in samples when different Al/clay ratios are applied in pillaring a montmorillonite with aluminum were analyzed and a relation between pillar density and acidity was also found.

TL;DR: In this article, the adsorption behavior of IO 3 − by hydrotalcite-type compounds with CO 3 − (HTCO 3 ) or NO 3− (HTNO 3 ) interlayer anions was studied.

TL;DR: In this paper, the removal of Fe(III) impurities from low-grade kaolin by iron-reducing bacteria was investigated, where Maltose, sucrose, and glucose could be used as substrates.

TL;DR: In this paper, the intercalation of a highly ordered kaolinite from Birdwood, South Australia, has been studied using a combination of electron microscopy, X-ray diffraction and Raman microscopy.

TL;DR: Inorganic porous materials based on modified sepiolites have been studied as supports for controlled degradation of Lindane, a chlorinated pesticide as mentioned in this paper, which can dehydrohalogenate Lindane to pentachlorocyclohexene (PCCH).

TL;DR: In this paper, ten montmorillonite type clay samples from Miles, Queensland, Australia, have been characterised using XRD, ICP-AES and infrared spectroscopy.

TL;DR: In this article, the authors studied the effect of various doses of γ-irradiation on various types and concentration of radiation-induced defects, deuteration, changes in specific surface and solubility of minerals irradiated in D 2 O solution in closed capsules.

TL;DR: In this article, the kinetics of dehydroxylation of a kaolin clay in presence of ETP sludge were investigated and nine solid-state mechanisms were applied for analysing the data obtained in the temperature range of 450-750 °C.

TL;DR: In this article, the authors present the fundamental spectra of beidellite, illite and muscovite and show that the composition of illites is a continuum into muscoveites.