Download or read book Soil Colloids and Their Associations in Aggregates written by Marcel F. De Boodt and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: S. Henin Versailles, France It was a pleasure for me to take part in the NATO Advanced Study Workshop for studies of 'Soil Colloids and their Associations in Soil Aggregates'. The meeting provided me with a welcome opportunity to renew acquaintances with respected colleagues in the various fields of Soil Science, to listen to their presentations, and be involved in discussions which were at the frontiers of the science which deals with the structures and the associations of the soil colloidal constituents. In my view the rapid advances in Soil Science, and the great benefits to agriculture from these, have their origins in the emerging understanding of the structures and the associations of the different soil colloids. It is clear that much research is still needed before the molecular details of the most important of the structures and of the interactions are fully understood. The associations between the soil colloids, and the manner in which they bind to or hold the other constituents of soils in aggregates is fundamental to soil fertility. and the Modem intensive agriculture leads to the degradation of soil structure subsequent loss through erosion of a resource that is vital for the production of food. This degradation is considered to result primarily from the biological oxidation of the indigenous soil organic matter, and from the failure to return to the soil sufficient organic residues to compensate for such losses.
Download or read book Swelling of Clay Minerals and Its Impact on Permeability written by Irem Aksu and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Formation damage has been described as any irreversible alteration, i.e. decrease of permeability, of the hydrocarbon reservoir rock after wellbore operations, which may have a serious economic impact upon the productivity of the reservoir. The presence of clays minerals is often considered as a major cause of formation damage. Thus, clay behavior in porous media needs to be taken into account when evaluating the potential productive capacity of hydrocarbon reservoir sandstones. Since the main mechanisms of permeability reduction, such as fine migration and clay swelling, occur at the pore-scale, in this study we couple permeability experiments with X-ray [mu]-computed tomography ([mu]-CT) to visualize and quantify clay behavior in porous media. The selected porous media were packed columns (diameter, d=1.27 cm, average length, L=6.4 cm) of soda lime beads and quartz grains. Various amounts of swelling (montmorillonite) and non-swelling (kaolinite) clays were added as coatings on beads and quartz. The amount of clay in the samples varied from 1.38 to 5.5wt.% in montmorillonite-coated samples and from 2.0 to 6.84wt.% in kaolinite-coated samples. Permeability measurements were performed on each sample to investigate the impact of clay content and grain size on permeability reduction as a result of clay swelling. Permeability changes were monitored as a function of time. Visualization of coated bead and grains columns by [mu]-CT provided quantitative information on morphological changes of clay grains/coatings among dry and water-saturated samples. All clay-coated samples showed 10-40% decrease in permeability as compared to uncoated samples (K/Ko= 0.6-0.9). In general, the higher the clay content was, the larger permeability reduction was observed. Permeability remained constant within an error after 4 hours of flow experiment in montmorillonite samples. In contrast, permeability of kaolinite samples oscillated with time, possibly due to fine migration. A 39% volume increase of montmorillonite particles was observed by [mu]-CT immediately after the sample was saturated with water, i.e. swelling occurred almost instantaneously after water-clay contact. However, no further changes in volume were observed after 4 hours of flow. Kaolinite-coated samples showed a 15% volume increase of clay particles, which was attributed to the hydration of clay pellets by water. The calculated porosity reduction associated with clay swelling ranged from 0.4-1.7% including both montmorillonite- and kaolinite-coated samples. This decrease in porosity was estimated to cause only a 2-5% reduction in permeability, primarily due to the high initial porosity and permeability of the selected samples. This study presents a base line to estimate changes in permeability as a result of clay swelling for variable clay content, grain size, and porosity.
Download or read book Clays and Clay Minerals written by S. W. Bailey and published by Elsevier. This book was released on 2013-10-22 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays and Clay Minerals documents the proceedings of the 14th National Conference in Berkeley, California. This book focuses on the structure and quantitative analysis, surface reactivity, genesis, and synthesis of clays and clay minerals. Topics discussed include status of clay mineral structures; layer charge relations in clay minerals of micaceous soils and sediments; mechanical force fields in a clay mineral particle system; and kinetics of decomposition of cobalt coordination complexes on montmorillonite surfaces. The factors affecting the frequency distribution of clay minerals in soils; stability of brucite in the weathering zone of the new Idria serpentinite; and interrelationships of physical and chemical properties of kaolinites are also elaborated in this publication. This compilation is beneficial to students and researchers conducting work on clay mineral studies.
Download or read book Clays and Clay Minerals written by Ada Swineford and published by Elsevier. This book was released on 2013-09-24 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earth Sciences, Volume 11: Clays and Clay Minerals covers the proceedings of the Ninth National Conference on Clays and Clay Minerals, held at the Purdue University, Lafayette, Indiana on October 5-8, 1960, sponsored by the Committee on Clay Minerals of the National Academy of Sciences – National Research Council. The Conference features two symposia, namely, the "Engineering Aspects of Physico-Chemical Properties of Clays and the "Clay-Organic Complexes. This book is composed of 42 chapters and begins with descriptions of the mechanical, structural, thermodynamic, physical, and thermal properties of clay minerals. The succeeding chapters are devoted to certain reactions, theoretical and experimental aspects, occurrence, formation, and sorption properties of these minerals. Other chapters explore other involved mineral reactions, including interlamellar, cation exchange, swelling, and adsorption. The concluding chapters examine the viscometric constants of suspension, stabilization mechanism, and random growth of certain clay minerals. This book will be of value to geologists, mineralogists, and researchers in the field.
Download or read book The Origin of Clay Minerals in Soils and Weathered Rocks written by Bruce B. Velde and published by Springer Science & Business Media. This book was released on 2008-07-18 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of huge relevance in a number of fields, this is a survey of the different processes of soil clay mineral formation and the consequences of these processes concerning the soil ecosystem, especially plant and mineral. Two independent systems form soil materials. The first is the interaction of rocks and water, unstable minerals adjusting to surface conditions. The second is the interaction of the biosphere with clays in the upper parts of alteration profiles.
Download or read book Swelling Hysteresis of Clay Minerals written by Nikolas Anastasios Memmos and published by . This book was released on 1963 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Topics in the Utilization of Clay in Industrial and Medical Applications written by Mansoor Zoveidavianpoor and published by Intechopen. This book was released on 2018 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Swelling of Clay Minerals written by Tim Jacobus Tambach and published by . This book was released on 2005 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Clays written by G. Jock Churchman and published by CRC Press. This book was released on 2019-06-10 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the human population grows from seven billion toward an inevitable nine or 10 billion, the demands on the limited supply of soils will grow and intensify. Soils are essential for the sustenance of almost all plants and animals, including humans, but soils are virtually infinitely variable. Clays are the most reactive and interactive inorganic compounds in soils. Clays in soils often differ from pure clay minerals of geological origin. They provide a template for most of the reactive organic matter in soils. They directly affect plant nutrients, soil temperature and pH, aggregate sizes and strength, porosity and water-holding capacities. This book aims to help improve predictions of important properties of soils through a modern understanding of their highly reactive clay minerals as they are formed and occur in soils worldwide. It examines how clays occur in soils and the role of soil clays in disparate applications including plant nutrition, soil structure, and water-holding capacity, soil quality, soil shrinkage and swelling, carbon sequestration, pollution control and remediation, medicine, forensic investigation, and deciphering human and environmental histories. Features: Provides information on the conditions that lead to the formation of clay minerals in soils Distinguishes soil clays and types of clay minerals Describes clay mineral structures and their origins Describes occurrences and associations of clays in soil Details roles of clays in applications of soils Heavily illustrated with photos, diagrams, and electron micrographs Includes user-friendly description of a new method of identification To know soil clays is to enable their use toward achieving improvements in the management of soils for enhancing their performance in one or more of their three main functions of enabling plant growth, regulating water flow to plants, and buffering environmental changes. This book provides an easily-read and extensively-illustrated description of the nature, formation, identification, occurrence and associations, measurement, reactivities, and applications of clays in soils.
Download or read book Clay Minerals written by Ernő Nemecz and published by . This book was released on 1981 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reservoir Formation Damage written by Faruk Civan and published by Elsevier. This book was released on 2011-08-30 with total page 1135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reservoir Formation Damage, Second edition is a comprehensive treatise of the theory and modeling of common formation damage problems and is an important guide for research and development, laboratory testing for diagnosis and effective treatment, and tailor-fit- design of optimal strategies for mitigation of reservoir formation damage. The new edition includes field case histories and simulated scenarios demonstrating the consequences of formation damage in petroleum reservoirsFaruk Civan, Ph.D., is an Alumni Chair Professor in the Mewbourne School of Petroleum and Geological Engineering at the University of Oklahoma in Norman. Dr. Civan has received numerous honors and awards, including five distinguished lectureship awards and the 2003 SPE Distinguished Achievement Award for Petroleum Engineering Faculty. - Petroleum engineers and managers get critical material on evaluation, prevention, and remediation of formation damage which can save or cost millions in profits from a mechanistic point of view - State-of-the-Art knowledge and valuable insights into the nature of processes and operational practices causing formation damage - Provides new strategies designed to minimize the impact of and avoid formation damage in petroleum reservoirs with the newest drilling, monitoring, and detection techniques
Download or read book Computer Simulations of Hydration and Swelling in Clay Minerals written by Yu Wang and published by . This book was released on 2004 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil and Environmental Chemistry written by William F. Bleam and published by Academic Press. This book was released on 2016-11-30 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil and Environmental Chemistry, Second Edition, presents key aspects of soil chemistry in environmental science, including dose responses, risk characterization, and practical applications of calculations using spreadsheets. The book offers a holistic, practical approach to the application of environmental chemistry to soil science and is designed to equip the reader with the chemistry knowledge and problem-solving skills necessary to validate and interpret data. This updated edition features significantly revised chapters, averaging almost a 50% revision overall, including some reordering of chapters. All new problem sets and solutions are found at the end of each chapter, and linked to a companion site that reflects advances in the field, including expanded coverage of such topics as sample collection, soil moisture, soil carbon cycle models, water chemistry simulation, alkalinity, and redox reactions. There is also additional pedagogy, including key term and real-world scenarios. This book is a must-have reference for researchers and practitioners in environmental and soil sciences, as well as intermediate and advanced students in soil science and/or environmental chemistry. Includes additional pedagogy, such as key terms and real-world scenarios Supplemented by over 100 spreadsheets to migrate readers from calculator-based to spreadsheet-based problem-solving that are directly linked from the text Includes example problems and solutions to enhance understanding Significantly revised chapters link to a companion site that reflects advances in the field, including expanded coverage of such topics as sample collection, soil moisture, soil carbon cycle models, water chemistry simulation, alkalinity, and redox reactions
Download or read book Clays in the Minerals Processing Value Chain written by Markus Gräfe and published by . This book was released on 2017 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays are increasingly becoming a major problem in the mining, extraction and value-adding processes for a wide range of commodity raw materials. Clays can impact negatively on virtually every unit process within the mining and minerals processing sector, having long-term environmental implications that go well beyond the lifetime of the mining operation. This book is the first to compile, explain and evaluate the effects of clays in the mineral processing value chain, from mining to minerals processing, and finally, tailings disposal. Focusing on topics from the chemistry and rheology of clays to their detection and dissolution behaviour, this book provides comprehensive coverage of the effects on processes such as settling, preg-robing, flotation and comminution. It is an excellent reference for professional mineralogists and geologists, industrial engineers, and researchers interested in clays and clay minerals.
Download or read book The Science of Clays written by Swapna Mukherjee and published by Springer Science & Business Media. This book was released on 2013-10-09 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Interpretation of Micromorphological Features of Soils and Regoliths written by Georges Stoops and published by Elsevier. This book was released on 2018-09-17 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interpretation of Micromorphological Features of Soils and Regoliths, Second Edition, provides researchers and students with a tool for interpreting features observed in soil thin sections and through submicroscopic studies. After an introduction and general overview, micromorphological aspects of regoliths (e.g., saprolites, transported materials) are highlighted, followed by a systematic and coherent discussion of the micromorphological expression of various pedogenic processes. The book is written by an international team of experts in the field, using a uniform set of concepts and terminology, making it a valuable interdisciplinary reference work. The following topics are treated: freeze-thaw features, redoximorphic features, calcareous and gypsiferous formations, textural features, spodic and oxic horizons, volcanic materials, organic matter, surface horizons, laterites, surface crusts, salt minerals, biogenic and pedogenic siliceous materials, other authigenic silicates, phosphates, sulphidic and sulphuric materials, and features related to faunal activity. The last chapters address anthropogenic features,archaeological materials and palaeosoils. - Updates the first exhaustive publication on interpretation of micromorphological features, with some new chapters and with a larger number of additional references - Covers related topics, making micromorphology more attractive and accessible for geomorphologists, archaeologists and quaternary geologists Includes thematic treatment of a range of soil micromorphology fields and broadens its applications - Features input from a multi-disciplinary team, ensuring thorough coverage of topics related to soil science, archaeology and geomorphology
Download or read book Clays and Clay Minerals written by Clay Minerals Society and published by . This book was released on 1967 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
