Developments in Palygorskite-Sepiolite Research: A New by Arieh Singer, Emilio Galan

By Arieh Singer, Emilio Galan

The goal of this comprehenvise ebook is to present the most important effects completed within the learn of the clay minerals palygorskite and sepiolite. Palygorskite and sepiolite have discovered to be important in a large number of commercial and scientific applications. therefore, examine on those clays has been intensified over the last twenty years, and important advances of their characterization were made. The publication includes contributions from amazing scientists within the field.

  • Comprehensive therapy of palygorskite and sepiolite
  • Cutting-edge developments in business minerals and applications
  • Written by way of unusual scientists within the field

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Additional resources for Developments in Palygorskite-Sepiolite Research: A New Outlook on these Nanomaterials (Developments in Clay Science)

Example text

Jones and Gala´n, 1988; Ruiz-Hitzky, 2001; Serna and Fernandez-Alvarez, 1974). g. Ruiz-Hitzky, 2001). The presence of OCD structures in palygorskite and sepiolite may partly explain why some samples absorb large molecules and others do not. OCD structures or channels resulting from the occurrence of wide polysomes would enable geometric configurations consistent with exchange. Further, OCD structures and wide channels may enable zeolitic H2O molecules to be more mobile during exchange with organic molecules, potentially affecting the kinetics of exchange.

This body of work clearly defines a process, although details on the specific nature of the structural transformation were not provided. The transformation of palygorskite to smectite was investigated in detail using AFM and TEM techniques on natural samples by Krekeler et al. (2005) using materials from a paleohydrologic horizon from the Meigs Member of the Hawthorne Formation, southern Georgia, USA. AFM investigation indicated that palygorskite fibres in this horizon were commonly altered. Many AFM images of the altered fibres showed an oriented overgrowth of platy morphology, which was interpreted as smectite.

In support of Milton (1977), Khomyakov (1995, p. 47) stated in reference to the agpaitic post-magmatic environments and soda lakes “. ” Although Khomyakov (1995) stresses the similarities of the “physicochemical” conditions, a more precise statement may be that there is a continuum of environments, where the activity of (the components comprising) the polysomes, apolysome, is similar. 22 Developments in Palygorskite-Sepiolite Research Two important characteristics of the palygorskite–sepiolite group minerals are the continuous basal oxygen atom plane forming the tetrahedral linkages and the octahedral strips that forms polysomes.

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