Results 161 to 170 of about 3,433 (213)

Effect of Rehydration on Structure and Surface Properties of Thermally Treated Palygorskite [PDF]

Journal of Colloid and Interface Science, 2013
Palygorskite has a fibrous like morphology with a distinctive layered appearance. The simplified formula of palygorskite (Mg5Si8O20(OH)2(OH2)4 nH2O) indicates that two different types of water are present.
Tianhu Chen, Chengsong Qing, Dongyin Chang   +2 more
exaly   +2 more sources

Adsorption of the Herbicide 2,4-D on Organo-Palygorskite [PDF]

Applied Clay Science, 2010
Among the clay minerals, montmorillonite is the most extensively studied material using as adsorbents, but palygorskite and its organically modified products have been least explored for their potential use in contaminated water remediation.
Mallavarapu Megharaj, Yunfei Xi
exaly   +2 more sources

High Catalytic Performance of Fe-Ni/Palygorskite in the Steam Reforming of Toluene for Hydrogen Production

Applied Energy, 2018
The inexpensive and abundant material, palygorskite, was used as a promising catalyst support to prepare Fe-Ni/Pal catalysts. Catalytic steam reforming of toluene as a biomass tar model compound over these catalysts was investigated in a fixed-bed ...
Dong Chen, Xuehua Zou, Yanliu Dang
exaly   +2 more sources

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FLOCCULATION OF HOMOIONIC SODIUM PALYGORSKITE, PALYGORSKITE-MONTMORILLONITE MIXTURES AND PALYGORSKITE CONTAINING SOIL CLAYS

Soil Science, 1999
Flocculation of palygorskite has not been studied in detail. We have investigated flocculation of reference palygorskites, palygorskite-montmorillonite mixtures, and palygorskite containing soil clays. The flocculation values (FVs) of the clays were measured in a series of test tubes according to van Olphen (1977).
Alexander Neaman, Arieh Singer
openaire   +1 more source

Mössbauer Studies of Palygorskite and Some Aspects of Palygorskite Mineralogy

Clays and Clay Minerals, 1981
AbstractFe3+ ions in palygorskite occupy sites at the edges and in the interior of the alumino-silicate chains. The Mössbauer parameters of the doublets associated with Fe3+ ions in edge sites indicate that the sites have a regular 6 coordination. Fe3+ ions in the interior of the chains occupy M(1) sites in three of the samples examined and M(2) sites ...
L. Heller-Kallai, I. Rozenson
openaire   +1 more source

Synthesis, Characterization and Swelling Behaviour of Poly(sodium acrylate)/Palygorskite Superabsorbent Composites based on Palygorskite and Organo-palygorskite

Journal of Polymer Engineering, 2009
Novel superabsorbent composites based on partially neutralized acrylic acid (SA) and palygorskite (PLG) were synthesized by aqueous solution polymerization. The effects of PLG, organo-PLG (O-PLG) and the content of PLG in the copolymeric gels on the water sorption and the initial swelling rate in deionized water and saline solution (0.2 wt% NaCl (aq) )
F. Santiago, A.E. Mucientes, B. Talavera
openaire   +1 more source

Structure defects in palygorskite

Clay Minerals, 1984
It is well established that palygorskite has an amphibole-like, double-chain structure. The linked tetrahedral groups forming continuous sheets are divided into ribbons of various widths due to alternation of the direction of tetrahedra which run parallel to the fibre axis (Brindley, 1980).
S. Lokanatha, S. Bhattacherjee
openaire   +1 more source

Thermal analysis of palygorskite

Thermochimica Acta, 1975
Abstract Slickensides and fissures in a fresh outcrop of silicified limestones at the Burgenstock (Switzerland) contained palygorskite. According to TG, DTA and heating X-ray experiments, dehydration of the palygorskite took place in four steps. Each step clearly showed an alteration in the unit cell dimensions.
W. Hirsiger, M. Müller-Vonmoos, H.G. Wiedemann   +2 more
openaire   +1 more source

Dehydration Transformation in Palygorskite

Transactions of the Indian Ceramic Society, 1984
Structural changes accompanying dehydration and thermal transformations in palygorskite have been critically reviewed. Salient features of the dehydration mechanisms proposed by various authors have been discussed. Results of some X-ray and electron microscopic studies made by the authors on this problem, clarifying some points in greater detail, have ...
S. Bhattacherjee, S. Lokanatha
openaire   +1 more source

Sepiolite–Palygorskite Occurrences in Turkey

2011
Abstract Sepiolite–palygorskite occurrences and deposits in Turkey can be classified as sedimentary (marine and lacustrine), hydrothermal and pedogenic types based on their geological settings and mineralogical features. Marine types are formed within the evaporative clayey–sandy-carbonate rocks of Upper Cretaceous–Lower Miocene in the shallow ...
Yalcin, Huseyin, Bozkaya, Omer
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