Results 171 to 180 of about 6,658 (206)
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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
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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
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Amitriptyline removal using palygorskite clay
Chemosphere, 2016With the increased detections of commonly used pharmaceuticals in surface water and wastewater, extensive attentions were paid recently to the fate and transport of these pharmaceuticals in the environment. Amitriptyline (AMI) is a tricyclic antidepressant widely applied to treat patients with anxiety and depression.
Yo-Lin Tsai +11 more
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Mössbauer Studies of Palygorskite and Some Aspects of Palygorskite Mineralogy
Clays and Clay Minerals, 1981AbstractFe3+ 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
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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
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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
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Structure defects in palygorskite
Clay Minerals, 1984It 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
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Dehydration Transformation in Palygorskite
Transactions of the Indian Ceramic Society, 1984Structural 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
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Thermal analysis of palygorskite
Thermochimica Acta, 1975Abstract 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 +2 more
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Sepiolite–Palygorskite Occurrences in Turkey
2011Abstract 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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Journal of Alloys and Compounds, 2017
Abstract In this work, the effects of the rotating speed, the ball to material ratio and ball-milling time on the mechanical performance of palygorskite filled styrene butadiene rubber composites were intensively investigated through orthogonal experiments, using modified palygorskite powders of different structures and morphologies as reinforcement ...
Qingguo Tang +5 more
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Abstract In this work, the effects of the rotating speed, the ball to material ratio and ball-milling time on the mechanical performance of palygorskite filled styrene butadiene rubber composites were intensively investigated through orthogonal experiments, using modified palygorskite powders of different structures and morphologies as reinforcement ...
Qingguo Tang +5 more
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Sonochemical preparation of palygorskite nanoparticles
Applied Clay Science, 2011Palygorskite nanoparticles were prepared by sonochemical reaction. The products were characterized by X-ray fluorescence analysis (XRF), X-ray powder diffraction (XRD), thermal gravimetry analysis (TGA), differential thermal analysis (DTA) and infrared spectroscopy.
Zahra Darvishi, Ali Morsali
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