Download or read book The Nitrate Radical written by Richard P. Wayne and published by . This book was released on 1991 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Chemistry of Nitrate Radical NO3 and Dinitrogen Pentoxide N2O5 in Beijing written by Haichao Wang and published by Springer Nature. This book was released on 2020-10-31 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book systematically describes the instrument setup for the measurement of nitrate radical (NO3) and dinitrogen pentoxide (N2O5), as well as the mixing ratio, chemical behaviors, and atmospheric impacts of NO3 and N2O5 in Beijing, China. It also discusses the instrument design and data analysis method in detail. Based on several field measurements of NO3 and N2O5 in Beijing, it shows the variation in concentration and the budget of NO3 and N2O5. The N2O5 heterogeneous uptake coefficient was determined using various methods, and the relationship between the N2O5 uptake coefficient and the particle properties was demonstrated, as well as the impact of NO3–N2O5 chemistry to the atmospheric oxidation and the formation of particulate nitrate. These results increase our understanding of nighttime chemistry and provide insights into the role of NO3–N2O5 chemistry in other polluted regions.

Download or read book Kinetics and Photochemistry of the Nitrate Radical NO3 in the Gas Phase written by M. Fowles and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Nitrate Radical NO3 written by J. Hjorth and published by . This book was released on 1985 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Products and Mechanism of the Reaction Between the Nitrate Radical NO3 and Dimethylsulphide CH3SCH3 in Air written by Niels Roland Jensen and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Study of Some Nitrate Radical Reactions of Importance to Tropospheric Chemistry written by Ingvar Wängberg and published by . This book was released on 1993 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Application of Cavity Ring down Spectroscopy to Determine Nitrate Radical Concentrations in the Atmosphere written by Eric Michael Dick and published by . This book was released on 2002 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The nitrate radical, NO3, is a potent atmospheric oxidant. Current NO3 measurement methods average NO3 concentrations over several kilometer pathlengths. Recent modeling studies predict that NO3's distribution is vertically inhomogenous, causing previous NO3 observations to not be representative of its atmospheric chemistry. In-situ measurements offer a test of these modeling predictions and a better understanding of NO3 chemistry. In this thesis, we describe construction of an instrument capable of detecting NO3 in-situ. This sensor is based upon cavity ring-down spectroscopy. Our initial work demonstrated that CRDS could sensitively detect NO3. We then built and tested a field prototype during June 2001, successfully detecting NO3 in the field. CRDS observations were compared to path averaged NO3 observations. Similar time behavior of both signals indicated that the techniques were observing NO3. A consistent difference in signal levels indicated that the two techniques were not sampling a homogeneous air mass"--Leaf iii.

Download or read book Vibrational and Electronic Energy Levels of Polyatomic Transient Molecules written by Marilyn E. Jacox and published by Amer Inst of Physics. This book was released on 1994-01-01 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrate Radical Reactions as a Means of Remediating Antibiotic contaminated Wastewaters written by Justin Hung Duong (Graduate student) and published by . This book was released on 2021 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, the reaction between a new AOP radical, the nitrate radical (NO3•), and various antibiotics classes were studied using electron pulse radiolysis. Representative antibiotics from the penicillin, cephalosporin, and sulfonamide classes were studied. Certain antibiotics had a very fast reaction rate (k > 109 M-1s-1) whereas others were unreactive (

Download or read book The Nitrate Radical Physics Chemistry and the Atmosphere written by and published by . This book was released on 1991 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to Atmospheric Chemistry written by Daniel J. Jacob and published by Princeton University Press. This book was released on 1999 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric chemistry is one of the fastest growing fields in the earth sciences. Until now, however, there has been no book designed to help students capture the essence of the subject in a brief course of study. Daniel Jacob, a leading researcher and teacher in the field, addresses that problem by presenting the first textbook on atmospheric chemistry for a one-semester course. Based on the approach he developed in his class at Harvard, Jacob introduces students in clear and concise chapters to the fundamentals as well as the latest ideas and findings in the field. Jacob's aim is to show students how to use basic principles of physics and chemistry to describe a complex system such as the atmosphere. He also seeks to give students an overview of the current state of research and the work that led to this point. Jacob begins with atmospheric structure, design of simple models, atmospheric transport, and the continuity equation, and continues with geochemical cycles, the greenhouse effect, aerosols, stratospheric ozone, the oxidizing power of the atmosphere, smog, and acid rain. Each chapter concludes with a problem set based on recent scientific literature. This is a novel approach to problem-set writing, and one that successfully introduces students to the prevailing issues. This is a major contribution to a growing area of study and will be welcomed enthusiastically by students and teachers alike.

Download or read book Chemistry of Multiphase Atmospheric Systems written by Wolfgang Jaeschke and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapidly increasing interest in the problems of air pollution and source-receptor relationships has led to a significant expansion of knowledge in the field of atmospheric chemistry. In general the chemistry of atmospheric trace constituents is governed by the oxygen content of the atmosphere. Upon entering the atmosphere in a more or less reduced state, trace substances are oxidized via various pathways and the generated products are often precursors of acidic compounds. Beside oxidation processes occurring in the gas phase, gaseous compounds are often converted into solid aerosol particles. The various steps within gas-to-particle conversion are constantly interacting with condensation processes, which are caused by the tropospheric water content. Thus in addition to the gaseous state, a liquid and solid state exists within the troposphere. The solid phase consists of atmospheric conversion products or fly ash and mineral dust. The liquid phase consists of water, conversion products and soluble compounds. The chemistry occurring within this system is often referred to as hydrogeneous chemistry. The chemist interprets this term, however, more strictly as reactions which occur only at an interphase between phases. This, however, is not always what happens in the atmosphere. There are indeed heterogeneous processes such as reactions occurring on the surface of dry aerosol particles. But apart from these, we must focus as well on reactions in the homogeneous phase, which are single steps of consecutive reactions running through various phases.

Download or read book Modeling of Atmospheric Chemistry written by Guy P. Brasseur and published by Cambridge University Press. This book was released on 2017-06-19 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical modeling of atmospheric composition is a formidable scientific and computational challenge. This comprehensive presentation of the modeling methods used in atmospheric chemistry focuses on both theory and practice, from the fundamental principles behind models, through to their applications in interpreting observations. An encyclopaedic coverage of methods used in atmospheric modeling, including their advantages and disadvantages, makes this a one-stop resource with a large scope. Particular emphasis is given to the mathematical formulation of chemical, radiative, and aerosol processes; advection and turbulent transport; emission and deposition processes; as well as major chapters on model evaluation and inverse modeling. The modeling of atmospheric chemistry is an intrinsically interdisciplinary endeavour, bringing together meteorology, radiative transfer, physical chemistry and biogeochemistry, making the book of value to a broad readership. Introductory chapters and a review of the relevant mathematics make this book instantly accessible to graduate students and researchers in the atmospheric sciences.

Download or read book Mechanisms of Atmospheric Oxidation of the Alkanes written by Jack G Calvert and published by Oxford University Press. This book was released on 2008-09-15 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international team of eminent atmospheric scientists have prepared Mechanisms of Atmospheric Oxidation of the Alkanes as an authoritative source of information on the role of alkanes in the chemistry of the atmosphere. The book includes the properties of the alkanes and haloalkanes, as well as a comprehensive review and evaluation of the existing literature on the atmospheric chemistry of the alkanes and their major atmospheric oxidation products, and the various approaches now used to model the alkane atmospheric chemistry. Comprehensive coverage is given of both the unsubstituted alkanes and the many haloalkanes. All the existing quality measurements of the rate coefficients for the reactions of OH, Cl, O(3P), NO3, and O3 with the alkanes, the haloalkanes, and their major oxidation products have been reviewed and evaluated. The expert authors then give recommendations of the most reliable kinetic data. They also review the extensive literature on the mechanisms and rates and modes of photodecomposition of the haloalkanes and the products of atmospheric oxidation of the alkanes and the haloalkanes, and make recommendations for future use by atmospheric scientists. The evaluations presented allow an extrapolation of the existing kinetic and photochemical data to those alkanes and haloalkanes that are as yet unstudied. The current book should be of special interest and value to the modelers of atmospheric chemistry as a useful input for development of realistic modules designed to simulate the atmospheric chemistry of the alkanes, their major oxidation products, and their influence on ozone and other trace gases within the troposphere.

Download or read book Volatile Organic Compounds in the Atmosphere written by Ralf Koppmann and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every day, large quantities of volatile organic compounds (VOCs) are emitted into the atmosphere from both anthropogenic and natural sources. The formation of gaseous and particulate secondary products caused by oxidation of VOCs is one of the largest unknowns in the quantitative prediction of the earth’s climate on a regional and global scale, and on the understanding of local air quality. To be able to model and control their impact, it is essential to understand the sources of VOCs, their distribution in the atmosphere and the chemical transformations which remove these compounds from the atmosphere. In recent years techniques for the analysis of organic compounds in the atmosphere have been developed to increase the spectrum of detectable compounds and their detection limits. New methods have been introduced to increase the time resolution of those measurements and to resolve more complex mixtures of organic compounds. Volatile Organic Compounds in the Atmosphere describes the current state of knowledge of the chemistry of VOCs as well as the methods and techniques to analyse gaseous and particulate organic compounds in the atmosphere. The aim is to provide an authoritative review to address the needs of both graduate students and active researchers in the field of atmospheric chemistry research.

Download or read book Interim Assessment Atmospheric processes written by National Acid Precipitation Assessment Program (U.S.) and published by . This book was released on 1987 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Formation Mechanisms and Quantification of Organic Nitrates in Atmospheric Aerosol written by Andrew Waite Rollins and published by . This book was released on 2010 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen oxides (NOy) in Earth's troposphere exert control over the production of ozone (O3) and particulate matter. In this dissertation the role of NOy in the formation of secondary organic aerosols (SOA) is investigated using theoretical as well as both existing and new analytical techniques. A number of insights are gained into the process through which SOA is formed, and the chemical composition of SOA formed through oxidation of volatile organic compounds (VOCs) in the presence of NOx. In Chapter 2, I review the theoretical basis for understanding the formation of SOA in the atmosphere and the role of NOy in the context of this theory. Expectations for how the chemistry of NOx influences SOA formation and composition in the atmosphere are discussed in the context of previously reported laboratory measurements. In Chapter 3, I describe a chamber study quantifying the formation of organic nitrates and SOA through the oxidation of isoprene by the nitrate radical (NO3) and discuss the importance of this SOA source on a global scale. The importance of multiple stages of isoprene oxidation by NO3 is investigated and quantified for the first time. In Chapter 4, I investigate the degree to which organic nitrates in aerosols can be quantified using an Aerodyne Aerosol Mass Spectrometer (AMS). How aerosol organic nitrates affect the current understanding of organic aerosol composition obtained via AMS is discussed. In Chapter 5, I describe a new instrument capable of quantifying organic nitrates in particles, representing a significant advance in the analysis of the chemical composition of organic aerosols. This instrument is used in the laboratory to quantify the formation of organic nitrates in particles formed through high-NOx photooxidation of a number of SOA precursors.