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This book is an attempt to provide a comprehensive and coherent description of three widely separated aspects of clays: the science of clays; the industrial uses of clays; and the role of clays in the environment. Most of the existing literature lacks such an integrated study and this work endeavours to fill that gap. An exhaustive account of the science of clays is presented in Part I of the book, which includes the classification, origin and evolution, composition and internal structure, chemical and physical properties of clays; soil mechanics; and analytical techniques for determining clay constituents. Part II provides a comprehensive description of the applications of clays and their derivatives in various industries, while Part III describes the role of clays in the environment; the pollution caused by clay minerals; and the application of clays in order to prevent environmental hazards. A principal feature of the book is its explanation of how the structure and composition of particular clay types facilitate their specific industrial or environmental applications, thus describing the interrelationship between three widely varying aspects of clay. A number of thought-provoking questions are raised at the end of the work in order to leave readers with a better insight in this regard.
To a geologist, clay minerals are fine particles (
This book on Applied Clay Mineralogy is comprehensive. It covers the structure, composition, and physical and chemical properties of kaolinite, halloysite, ball clays; bentonites including sodium montmorillonite, calcium montmorillonite, and hectorite; and palygorskite and sepiolite. There is also a short chapter on common clays which are used for making structural clay products and lightweight aggregate. The location and geology of the major clay deposits that are marketed worldwide and regionally include kaolins from the United States, Southwest England, Brazil, and the Czech Republic along with halloysite from New Zealand and ball clays from the US, England, Germany, and Ukraine. Bentonites from the U.S. and Europe are included along with palygorskite and sepiolite from the U.S., China, Senegal, and Spain. The mining and processing of the various clays are described. Extensive discussions of the many applications of the clays are included. The appendices cover the important laboratory tests that are used to identify and evaluate the various types of clay. Many figures are included covering electron micrographs, processing flow sheets, stratigraphy, and location maps. * Provides the structure and composition of clay minerals, as well as their phyisical and chemical properties * Discusses pplications for Kaolin, Bentonite, Palygorskite and Sepiolite * Contains appendixes of laboratory tests and procedures, as well as a test for common clays
Clay and clay minerals have always been used since the ancient times for making ceramic materials and also as a building material. Over the past decades, there has been a growing trend in their applicability in different areas such as industries, environmental remediation and water treatment sectors. The growing trend is mainly associated with the fact that they are chemically and mechanically stable, have higher specific surface area and cation exchange capacity. Furthermore, clays can be modified to improve their functionalities in different sectors. In this chapter, we present a review of the structural, mineralogical and chemical properties of clay and the effect of surface modification in their structures. We further looked at their applicability in arsenic and fluoride removal in their raw and also in their modified form. Although the literature showed that modified clay minerals yields higher adsorption capacity as compared to raw clays little nothing has been reported yet in relation to the cost of modifying clays with chemical species. As such new studies should also elaborate on the cost effectiveness of modifying clay minerals with chemical species.
Clay is an abundant raw material which has a variety of uses and properties depending on their structure and composition. Clay minerals are inexpensive and environmentally friendly naturally occurring nanomaterials, thanks to their 1 nm thick silicate layers, in all types of sediments and sedimentary rocks. The book chapters have been classified according to their characteristics in topics and applications. Therefore, in the first section five chapters is dedicated to the characterization and utilization of clay minerals in deposits. The second section includes four chapters about the significance of clay minerals in soils. Third section is devoted to different aspects of clay minerals research, especially to the characterization of structure and modifications for their application.
The peculiar characteristics of clays provide it with very interesting adsorption qualities, especially for polar or ionisable molecules. Some of these characteristics include the silicates' sheet structure that makes a large surface area accessible for adsorption; the usually significant surface charge that can be responsible for strong electrostatic interactions; and clays' swelling properties and presence of exchangeable surface cations that facilitate ion-exchange mechanisms. Added to their wide availability and associated low cost, these characteristics have motivated in recent years an increasing interest in utilising natural, processed or chemically-modified clays for the removal of organic contaminants from aqueous solutions. This book discusses the application of clay materials for the removal of organic compounds from contaminated waters. It also discusses several other topics that include time and temperature related behaviour of clays; mechanical treatment of clay minerals; the workability of natural clays and clays in the ceramics industry; recent advances in hydraulic performance of clay liners; and the genesis, properties and industrial applications of bauxitic lithomargic clay.
Introduction to Industrial Minerals introduces the reader to the subject of the new mineral raw materials that our society demands. It emphasizes the way in which, in order to satisfy the consumer, the requirements of industry control mineral exploitation, and the way fundamental mineral properties are exploited for particular applications. It describes aggregates, industrial clays and raw materials for the chemical industry. The need for high temperature processing is addressed with a chapter on interpretation and use of mineralogical phase diagrams and time-temperature-transformation diagrams. These are then applied in separate chapters on the manufacture of glass, cement, brick clays and refractories. Evaluation of geological reserves is described in the context of computer modelling of deposit quality, and the final chapter considers the use of a site after extraction, emphasizing the requirements for waste disposal.
Discusses measuring the surface properties of flat or particulate solids with contact angles of drops of high-energy liquids deposited on solid surfaces or via the thin-layer wicking technique. It focuses on Lifshitz-van der Waals, Lewis acid-base, and electrical double layer interactions.
Studies the Environmental, Cosmetic, and Pharmaceutical Applications of Bentonite ClayBentonite clay, of which members of the smectite family of clay minerals are particularly important, has proven to be effective in sealing off wastes from groundwater. Bentonite Clay: Environmental Properties and Applications explores the mineralogy of clays in ge
Concluding the trilogy on geological materials in construction, this authoritative volume reviews many uses of clays, ranging from simple fills to sophisticated products. Comprehensive and international coverage is achieved by an expert team, including geologists, engineers and architects. Packed with information prepared for a wide readership, this unique handbook is also copiously illustrated. The volume is dedicated to the memory of Professor Sir Alec Skempton. Various definitions of 'clay' are explored. Clay mineralogy is described, plus the geological formation of clay deposits and their fundamental materials properties. World and British clay deposits are reviewed and explained. New compositional data are provided for clay formations throughout the stratigraphic column. Investigative techniques and interpretation are considered, ranging from site exploration to laboratory assessment of composition and engineering performance. Major civil engineering applications are addressed, including earthworks, earthmoving and specialized roles utilizing clays. Traditional earthen building is included and shown to dominate construction in places. Clay-based construction materials are detailed, including bricks, ceramics and cements. The volume also includes a comprehensive glossary.