Download or read book Kinetics and Mechanism of Mn II Oxidation by Permanganate in Aqueous Phosphoric Acid Solution written by Roger Todd Echols and published by . This book was released on 1989 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Kinetics of the Periodate Oxidation of Manganese to Permanganate written by Glenn R. Waterbury and published by . This book was released on 1951 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Part I Chemical Kinetics of the Oxidation of Manganese to Permanganate by Periodate Part II Solubility Activity Coefficients and Activity Product of Manganese II Iodate written by Anson Mack Hayes and published by . This book was released on 1950 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In Situ PE pH Analysis on the Oxidation Kinetics of Manganese Bearing Solution written by William Ethier Colon and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of manganese(II) oxidation in oxygenated solutions has been well documented over long timescales (> 30 days) and over varying temperature ranges. Experimental setup for this study involved the addition of MnCl2-4H2O solid to a basic (pH 9 - 10.25) aqueous solution to produce an initial MnII concentration ranging 1 -- 100 mM. We apply a method of in situ pH and pE analysis to study the major reactions occurring during Mn oxidation. The experimental system is not run under equilibrium conditions. pH is neither titrated nor buffered, where doing so would interfere with the pH and pE of the solution. This type of analysis has not been previously performed. Calculation of an experimental rate constant of the system confirmed that changes in pE/pH slope of the solution reflected changes in the rate of the reaction. Changes in rate of reaction are due to alteration of the major reaction taking place.From solution chemistry, two major reaction stages were noted. Stage 1 can be further broken down into stages 1A and 1B, with 1A lasting one minute and consisted of the MnII hydration reaction to Mn(OH)2. Stage 1B continued with Mn hydration as well as the slower 1 electron oxidation Mn(OH)2 to Mn(OH)3. Both manganese hydroxides are amorphous phases, confirmed by both XRD and elemental analysis. However with increasing extent of reaction, the crystallinity of the solid increased. Since rate of reaction decreases with decreasing pH, and Mn hydration is fast, the expected transformation pathway for the production of observed groutite, feitknechtite and hausmannite is by oxidation of amorphous phases Mn(OH)2 to Mn(OH)3, and transformation to crystalline phases. Specifically rate of production of feitknechtite is slightly fast compared to groutite, but groutite is metastable and its rate of transformation to hausmannite is faster than its rate formation. Comparatively, the transformation of feitknechtite toivhausmannite is slower, therefore feitknechtite transformation primarily dictates the rate of reaction.[OH-] was found to be second order with respect to the rate of Mn oxidation, which is in accordance with the rate law for Mn oxidation given by Stumm and Morgan, 1996: -d[MnII(aq)]/dt = k1 [MnII(aq)][OH-(aq)]2[O2 (aq)] + k2[MnII(aq)][MnOx (s)][OH-(aq)]2[O2 (aq)]. However, experimental MnII(aq) concentration data over time, gathered from this study revealed [MnII] to be second order with respect to rate of reaction, which countered Stumm and Morgan, (1996). [OH-] was noted to be the major contributor to the Mn oxidation. From this, an initial approximation of the rate constant was calculated as Mn oxidation reaction to be pseudo-second order with respect to [OH-], written as --d[MnII]/dt = kOH[O2][OH-]2 . kOH was then calculated and used to iteratively solve for the apparent rate constant for the overall rate equation, kapp = [MnII]2[O2][OH-]2. kapp for the oxidation of Mn was determined to be 6.2*1015 M-4 Hr-1. Complete comparison to the Stumm and Morgan, (1996) equation was not possible as BET surface area studies were not performed during this study. However, [MnII] over the course of the experiments was never reduced more than by 33%, suggesting Mn underwent autocatalytic oxidation over the course of the experiment.

Download or read book Indian Journal of Chemistry written by and published by . This book was released on 1993 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the South Dakota Academy of Science written by South Dakota Academy of Science and published by . This book was released on 1982 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Indian Science Congress written by Indian Science Congress Association and published by . This book was released on 1979 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current Chemical Papers written by Chemical Society (Great Britain) and published by . This book was released on 1962 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt: A classified world list of new papers in pure chemistry.

Download or read book Russian Journal of Physical Chemistry written by and published by . This book was released on 1961 with total page 1454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination and Use of Stability Constants written by Arthur Earl Martell and published by Wiley-VCH. This book was released on 1992 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes potentiometric methods for determining stability constants and explains how these constants can be used to describe metal ion speciation in complex environmental and biological systems. It also provides three original computer programs on a disk for calculating stability constants and for using stability constants to calculate concentrations of molecular species in solution. The author gives examples of calculations for simple metal chelates, for metal complexes of large organic molecules, and for mixtures containing several metal ions and complexing agents in aqueous solution. They also describe common errors in calculating stability constants and how to avoid them. This carefully revised second edition is now even more useful to the reader, and, in particular, to those who make use of the program disk. Each program has been revised to improve speed, control, and error trapping.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1972-08 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CRC Handbook of Metal Etchants written by Perrin Walker and published by CRC Press. This book was released on 1990-12-11 with total page 1434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents cleaning and etching solutions, their applications, and results on inorganic materials. It is a comprehensive collection of etching and cleaning solutions in a single source. Chemical formulas are presented in one of three standard formats - general, electrolytic or ionized gas formats - to insure inclusion of all necessary operational data as shown in references that accompany each numbered formula. The book describes other applications of specific solutions, including their use on other metals or metallic compounds. Physical properties, association of natural and man-made minerals, and materials are shown in relationship to crystal structure, special processing techniques and solid state devices and assemblies fabricated. This publication also presents a number of organic materials which are widely used in handling and general processing...waxes, plastics, and lacquers for example. It is useful to individuals involved in study, development, and processing of metals and metallic compounds. It is invaluable for readers from the college level to industrial R & D and full-scale device fabrication, testing and sales. Scientific disciplines, work areas and individuals with great interest include: chemistry, physics, metallurgy, geology, solid state, ceramic and glass, research libraries, individuals dealing with chemical processing of inorganic materials, societies and schools.

Download or read book Electrochemical Synthesis of Inorganic Compounds written by Zoltan Nagy and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemical synthesis of inorganic compounds is a relatively unknown field. The successful, large industrial processes, such as chlorine-caustic production, are well known, but the large number of other compounds that have been synthesized electrochemically are much less appreciated, even by electrochemists and inorganic chemists. The last comprehensive book on this subject was published in the 1930's and no modern review or summary of the whole field is in existence. But the field is in no way dormant, as attested by the large number of publications, undiminished throughout the years, describing new syntheses and improvements of old ones. Indeed, it can be expected that practical applications of electrochemical inor ganic syntheses will increase in the future as an increasing portion of our energy will be available in electrical form. Electrochemical processes have important advantages over chemical routes: often the selectivity of the reaction can be better controlled through the use of potential control at the electrode, and the creation of environmen tally harmful waste material can be avoided more easily since one is using the purest reagent - the electron. In addition to development of new synthetic routes, many old ones, which were found to be un economical in the past, are worth reexamining in light of the recent considerable advances in cell design principles, materials of construc tion, and electrode and separator materials, together with our im proved understanding of electrode reactions and electrocatalysis. It is in the hope of accelerating this process that this bibliography is published.

Download or read book Study and Interpretation of the Chemical Characteristics of Natural Water 2nd Ed written by Geological Survey (U.S.) and published by . This book was released on 1961 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.

Download or read book Compound specific Stable Isotope Analysis written by Maik A Jochmann and published by Royal Society of Chemistry. This book was released on 2015-11-09 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of Compound-specific Stable Isotope Analysis (CSIA) is increasing in many areas of science and technology for source allocation, authentication, and characterization of transformation reactions. Until now, there have been no textbooks available for students with an analytical chemical background or basic introductory books emphasising the instrumentation and theory. This book is the first to focus solely on stable isotope analysis of individual compounds in sometimes complex mixtures. It acts as both a lecture companion for students and a consultant for advanced scientists in fields including forensic and environmental science. The book starts with a brief history of the field before going on to explain stable isotopes from scratch. The different ways to express isotope abundances are introduced together with isotope effects and isotopic fractionation. A detailed account of the required technical equipment and general procedures for CSIA is provided. This includes sections on derivatization and the use of microextraction techniques in GC-IRMS. The very important topic of referencing and calibration in CSIA is clearly described. This differs from approaches used in quantitative analysis and is often difficult for the newcomer to comprehend. Examples of successful applications of CSIA in food authenticity, forensics, archaeology, doping control, environmental science, and extraterrestrial materials are included. Applications in isotope data treatment and presentation are also discussed and emphasis is placed on the general conclusions that can be drawn from the uses of CSIA. Further instrumental developments in the field are highlighted and selected experiments are introduced that may act as a basis for a short practical course at graduate level.

Download or read book Chemical Demonstrations written by Lee R. Summerlin and published by . This book was released on 1988 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical demonstrations/L.R.Summerlin.--v.2