Download or read book Dissolution and Condensation Kinetics of Crystalline and Amorphous Silica in Alkaline Solutions written by Shawn David Thornton and published by . This book was released on 1985 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Dissolution Kinetics of Crystalline and Amorphous Silica in Hydrofluoric hydrochloric Acid Mixtures written by Da-Tung Liang and published by . This book was released on 1982 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Heterogeneous Kinetics of Silica Dissolution in Aqueous Media written by Gerald Sheldon Wirth and published by . This book was released on 1980 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Kinetics of Alkali Consumption by Silicate Minerals written by David C. Ting and published by . This book was released on 1985 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantifying Silica Reactivity in Subsurface Environments written by and published by . This book was released on 1999 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our goal is to develop a quantitative and mechanistic understanding of amorphous silica, SiO2(am), dissolution kinetics in aqueous solutions. A knowledge of fundamental controls on the reactivity of simple Si-O bonded phases is the baseline of behavior for understanding highly complex silica phases. In the Earth, silicate minerals comprise>70% of the crust and dominate virtually every subsurface system. More importantly for the objectives of this EMSP project, the silicates are important because compositionally complex glasses will become the front line of defense in containing radioactive wastes in the nation's long term and interim storage strategies. To date, the behavior of SiO2(am) is largely inferred from studies of the better known crystalline polymorphs (e.g. alpha-quartz). In the first step towards constructing a general model for amorphous silica reactivity in the complex fluid compositions of natural waters, we are determining the dissolution behavior as a function of temperature, solution pH and cation concentration. With these data we are determining relationships between SiO2 glass structure and dissolution rates in aqueous solutions, as described below.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Solubility and Polymerization Kinetics of Amorphous Silica in Aqueous Solutions written by Chang-Tsair Chang and published by . This book was released on 1986 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Dissolution Kinetics of Quartz and Amorphous Silica in Natural Waters written by Troy Howard Lorier and published by . This book was released on 2000 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Or Otherwise Noteworthy Taxa in the Genera Bidens and Coreopsis from Tropical Africa written by Earl Edward Sherff and published by . This book was released on 1955 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings 55th Annual California Regional Meeting March 27 29 1985 Bakersfield California written by Society of Petroleum Engineers of AIME. California Regional Meeting and published by . This book was released on 1985 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Kinetic Equations and Type Curves for Predicting the Precipitation of Amorphous Silica from Geothermal Brines written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The kinetics of amorphous silica precipitation from aqueous solution up to 100°C and containing up to 1M NaCl were studied experimentally. Empirical equations for the rate of molecular deposition on surfaces as a function of temperature, dissolved silica concentration, pH and salinity are presented. Empirical type curves which depict the decrease in dissolved silica concentration through homogeneous nucleation of colloidal silica are also presented. Two practical examples related to geothermal practice are given.

Download or read book Chemical Weathering Rates of Silicate Minerals written by Art F. White and published by de Gruyter. This book was released on 1995 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 31 of Reviews in Mineralogy reviews current thinking on the fundamental processes that control chemical weathering of silicates, including the physical chemistry of reactions at mineral surfaces, the role of experimental design in isolating and quantifying these reactions, and the complex roles that water chemistry, hydrology, biology, and climate play in weathering of natural systems. The chapters in this volume are arranged to parallel this order of development from theoretical considerations to experimental studies to characterization of natural systems. Secondly, the book is meant to serve as a reference from which researchers can readily retrieve quantitative weathering rate data for specific minerals under detailed experimental controls or for natural weathering conditions. Toward this objective, the authors were encouraged to tabulate available weathering rate data for their specific topics. Finally this volume serves as a forum in which suggestions and speculations concerning the direction of future weathering research are discussed.

Download or read book Kinetics of Silica Polymerization written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The polymerization of silicic acid in geothermal brine-like aqueous solutions to produce amorphous silica in colloidal form has been studied experimentally and theoretically. A large amount of high quality experimental data has been generated over the temperature rang 23 to 100°C. Wide ranges of dissolved silica concentration, pH, and sodium chloride concentration were covered. The catalytic effects of fluoride and the reaction inhibiting effects of aluminum and boron were studied also. Two basic processes have been separately studied: the formation of new colloidal particles by the homogeneous nucleation process and the deposition of dissolved silica on pre-existing colloidal particles. A rigorous theory of the formation of colloidal particles of amorphous silica by homogeneous nucleation was developed. This theory employs the Lothe-Pound formalism, and is embodied in the computer code SILNUC which quantitatively models the homogeneous nucleation and growth of colloidal silica particles in more than enough detail for practical application. The theory and code were extensively used in planning the experimental work and analyzing the data produced. The code is now complete and running in its final form. It is capable of reproducing most of the experimental results to within experimental error. It is also capable of extrapolation to experimentally inaccessible conditions, i.e., high temperatures, rapidly varying temperature and pH, etc.

Download or read book Kinetics of Silica Condensation In Brines written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous nucleation and growth of silica from brines supersaturated in silicic acid has been studied over a range of pH (4.5-6.7), temperature (75-105 C), salinity, and silicic acid concentration (700 to 1200 ppm as SiO2). The experimental technique involved analyses for molybdate-reactive silicic acid as a function of time after a supersaturated solution of H4SiO4 was prepared by mixing aliquots of a stock silicate solution with buffered brine. The isothermal rate of SiO2 condensation is a strong function of supersaturation (C/C{sub eq}), pH, and salinity. The overall kinetics follow what is expected from the general theory of phase transitions and are adequately described by the Volmer-Becker-Doring expressions for condensation from solution. At supersaturations less than about 3, an induction or transition time is observed. It amounts to several hundred minutes at supersaturations of about 2.0.

Download or read book The Kinetics of Silica water Reactions written by James Donald Rimstidt and published by . This book was released on 1981 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts written by and published by . This book was released on 1985 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transactions written by American Institute of Mining, Metallurgical, and Petroleum Engineers and published by . This book was released on 1989 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some vols., 1920-1949, contain collections of papers according to subject.