Download or read book Nitrogen Dioxide Peroxynitrates and the Chemistry of Tropospheric Ozone Production written by Joel Andrew Thornton and published by . This book was released on 2002 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precursors and Co products of Catalytic Ozone Production written by Patricia Anne Cleary and published by . This book was released on 2003 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Processes in Atmospheric Oxidation written by Georges Le Bras and published by Springer Science & Business Media. This book was released on 1997 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxidation and removal of atmospheric constituents involve complex sequences of reactions which can lead to the production of photo-oxidants such as ozone. In order to understand and model these complex reaction sequences, it is necessary to have a comprehensive understanding of reaction mechanisms and accurate estimates of kinetic parameters for relevant gas-phase atmospheric reactions. This book presents recent advances in the field and includes the following topics: e.g. the oxidation of simple organic compounds, NOx kinetics and mechanisms, OH radical production and rate constants for the OH attack on more complex organic compounds, peroxy and alkoxy radical reactions, photo-oxidation of aromatic and biogenic compounds, and the interaction between radical species.
Download or read book The Mechanisms of Reactions Influencing Atmospheric Ozone written by Jack G. Calvert and published by Oxford University Press. This book was released on 2015-05-13 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ozone, an important trace component, is critical to life on Earth and to atmospheric chemistry. The presence of ozone profoundly impacts the physical structure of the atmosphere and meteorology. Ozone is also an important photolytic source for HO radicals, the driving force for most of the chemistry that occurs in the lower atmosphere, is essential to shielding biota, and is the only molecule in the atmosphere that provides protection from UV radiation in the 250-300 nm region. However, recent concerns regarding environmental issues have inspired a need for a greater understanding of ozone, and the effects that it has on the Earth's atmosphere. The Mechanisms of Reactions Influencing Atmospheric Ozone provides an overview of the chemical processes associated with the formation and loss of ozone in the atmosphere, meeting the need for a greater body of knowledge regarding atmospheric chemistry. Renowned atmospheric researcher Jack Calvert and his coauthors discuss the various chemical and physical properties of the earth's atmosphere, the ways in which ozone is formed and destroyed, and the mechanisms of various ozone chemical reactions in the different spheres of the atmosphere. The volume is rich with valuable knowledge and useful descriptions, and will appeal to environmental scientists and engineers alike. A thorough analysis of the processes related to tropospheric ozone, The Mechanisms of Reactions Influencing Atmospheric Ozone is an essential resource for those hoping to combat the continuing and future environmental problems, particularly issues that require a deeper understanding of atmospheric chemistry.
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 Air Pollution by Photochemical Oxidants written by Ian Colbeck and published by Elsevier Science Publishing Company. This book was released on 1994 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. This book gives a detailed description of the observed behaviour of photochemical oxidants, especially ozone, on the urban, regional, and global scales. The volume includes: basic introductions to the biochemistry and physics of biogenic and anthropogenic production of photochemical oxidant precursors; room-temperature rate coefficients for gas-phase reactions as an aid to intercomparison; the synthesis of recent observations of photochemical oxidants over all spatial and temporal scales of interest; and a large selection of examples from the real atmosphere.Throughout, the emphasis is on understanding topics under simplified or controlled conditions; this book will be of great value to photochemists, environmental chemists, and all those concerned with (atmospheric) pollution.
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 The Chemistry and Deposition of Nitrogen Species in the Troposphere written by A. T. Cocks and published by . This book was released on 1993 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen compounds play a central role in atmospheric chemistry and are associated with several of today's major environmental issues. This new book addresses the fate of these compounds and gives a timely summary of the current knowledge and uncertainties in atmospheric science, which link emissions of nitrogen oxides and ammonia to key environmental effects. The Chemistry and Deposition of Nitrogen Species in the Troposphere reviews such topics as photochemical oxidants in the emission 'plumes' of large combustion sources and the critical loads concept (a method of quantifying ecosystem sensitivity), as well as particulate chemistry and wet deposition, key steps in the deposition process, and their synthesis in a large-scale nitrogen deposition model. The book also looks at such environmental effects as the formation of photochemical pollutants, and the acidification and eutrophication resulting from deposition of nitrogen compounds to terrestrial ecosystems. The papers included in this book cover the significant advances made in defining and understanding the physico-chemical processes which govern the atmospheric behaviour of nitrogen species and their ecological effects. All these issues will act as a focus for tightening emission limits when legislation is reviewed over the next few years. The Chemistry and Deposition of Nitrogen Species in the Troposphere will be of great interest to research scientists, environmental consultants and policymakers, worldwide.
Download or read book The Influence of Boundary Layer Chemistry on Global Tropospheric Ozone and Nitrogen Oxides written by Larry Wayne Horowitz and published by . This book was released on 1997 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Removal of Nitrogen Oxides from the Atmosphere written by Paul Romer and published by . This book was released on 2018 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concentration of nitrogen oxides (NOx ≡ NO + NO2) regulates the concentrations of all major atmospheric oxidants and the formation of secondary air pollutants, with consequences for climate, human health, and ecosystems. The chemical cycling between NOx and its oxidation products controls the concentration and transport of NOx and affects the spatial extent of air pollution. Previous studies have shown that permanent loss of NOx occurs both through production of HNO3 and through production of alkyl and multifunctional nitrates (RONO2). Despite their importance to atmospheric chemistry, significant uncertainties remain in the relative importance of these pathways and in the fates of RONO2 and HNO3 in the atmosphere. I use observations from two intensive field studies, the Southern Oxidant and Aerosol Study (SOAS) in Centreville Alabama and the Korea-United States Air Quality Study (KORUS-AQ) over South Korea, to provide new constraints on the lifetimes and fates of NOx oxidation products. I show that RONO2 compounds produced from isoprene oxidation have a lifetime under three hours and are lost both by gas-phase chemistry to re-release NOx to the atmosphere and by aerosol-phase hydrolysis to form HNO3. In contrast, observations of HNO3 and NOx over the Yellow Sea between China and South Korea confirm that HNO3 is nearly chemically inert in the troposphere. This finding contradicts recent proposals that HNO3 undergoes photolysis extremely rapidly in the aerosol phase. I apply these findings to investigate how the chemistry of NOx oxidation products affects the lifetime of NOx and the production of O3 in different environments. I show that, in general, the formation of short-lived NOx reservoirs extends the lifetime of NOx by sequestering NOx in less reactive forms. Furthermore, I show that in areas where the formation of RONO2 is the dominant pathway for NOx loss, ozone production efficiency no longer increases with temperature, changing the response of air quality to meteorology. Finally, I show that over the past decade, NOx chemistry has shifted in the United States towards a regime where RONO2 chemistry plays a greater role in the loss of NOx.
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 Transport and Chemical Transformation of Pollutants in the Troposphere written by Peter Borrell and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major environmental concern is the increasing burden on all scales of photo-oxidants, acidifying substances and potential nutrients in the troposphere. These lead to episodes of summer smog, and appreciable damage to eco-systems both on land and at sea. Underlying the environmental effects is the complex scientific problem of linking the man-made and biological emissions to the myriad chemical reactions that transform the pollutants as they are transported to and deposited in the surroundings and also pristine areas remote from the sources. The project, the scientific results of which are described in this book, was set up to study the problem in an inter-disciplinary way by co-ordinating the work of more than 150 research groups in some 20 countries.
Download or read book Photochemistry of Air Pollution written by Philip Leighton and published by Elsevier. This book was released on 2012-12-02 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photochemistry of Air Pollution provides information pertinent to air pollution and atmospheric chemistry. This book discusses the photochemical reactions produced by sunlight may convert relatively harmless pollutants into substances that constitute a nuisance, create possible health hazard, and cause economic problem to humans. Organized into 10 chapters, this book starts with an overview of the problem of air pollution, particularly photochemical smog. This text then discusses the factors that collectively determine the amount and spectral distribution of the radiation entering a surface layer of the atmosphere. Other chapters compare the specific absorption rates of several absorbers that are present in the air during periods of photochemical smog, including oxygen, ozone, nitrogen dioxide, sulfur dioxide, ketones, peroxides, and particulate matter. The final chapter deals with the process of formation of the substances responsible for the physiological effects of eye irritation and plant damage. This book is a valuable resource for photochemists and air pollution scientists.
Download or read book Environmental Toxicants written by Morton Lippmann and published by John Wiley & Sons. This book was released on 2009-03-26 with total page 1189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the most current information and research available for performing risk assessments on exposed individuals and populations, giving guidance to public health authorities, primary care physicians, and industrial managers Reviews current knowledge on human exposure to selected chemical agents and physical factors in the ambient environment Updates and revises the previous edition, in light of current scientific literature and its significance to public health concerns Includes new chapters on: airline cabin exposures, arsenic, endocrine disruptors, and nanoparticles
Download or read book Rethinking the Ozone Problem in Urban and Regional Air Pollution written by National Research Council and published by National Academies Press. This book was released on 1992-02-01 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite more than 20 years of regulatory efforts, concern is widespread that ozone pollution in the lower atmosphere, or troposphere, threatens the health of humans, animals, and vegetation. This book discusses how scientific information can be used to develop more effective regulations to control ozone. Rethinking the Ozone Problem in Urban and Regional Air Pollution discusses: The latest data and analysis on how tropospheric ozone is formed. How well our measurement techniques are functioning. Deficiencies in efforts to date to control the problem. Approaches to reducing ozone precursor emissions that hold the most promise. What additional research is needed. With a wealth of technical information, the book discusses atmospheric chemistry, the role of oxides of nitrogen (NOx) and volatile organic compounds (VOCs) in ozone formation, monitoring and modeling the formation and transport processes, and the potential contribution of alternative fuels to solving the tropospheric ozone problem. The committee discusses criteria for designing more effective ozone control efforts. Because of its direct bearing on decisions to be made under the Clean Air Act, this book should be of great interest to environmental advocates, industry, and the regulatory community as well as scientists, faculty, and students.
Download or read book First Principles of Meteorology and Air Pollution written by Mihalis Lazaridis and published by Springer Science & Business Media. This book was released on 2010-11-18 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book’s main objective is to decipher for the reader the main processes in the atmosphere and the quantification of air pollution effects on humans and the environment, through first principles of meteorology and modelling/measurement approaches. The understanding of the complex sequence of events, starting from the emission of air pollutants into the atmosphere to the human health effects as the final event, is necessary for the prognosis of potential risk to humans from specific chemical compounds and mixtures of them. It fills a gap in the literature by providing a solid grounding in the first principles of meteorology and air pollution, making it particularly useful for undergraduate students. Its broad scope makes it a valuable text in many related disciplines, containing a comprehensive and integrated methodology to study the first principles of air pollution, meteorology, indoor air pollution, and human exposure. Problem-solving exercises help to reinforce concepts.
Download or read book Small Animal Toxicology E Book written by Michael E. Peterson and published by Elsevier Health Sciences. This book was released on 2013-08-07 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diagnose and determine treatment for toxic exposures in small animals with this quick reference! Small Animal Toxicology, 3rd Edition covers hundreds of potentially toxic substances, providing the information you need to manage emergency treatment and prevent poisonings in companion animals. To help you identify an unknown poison, this guide provides a list of potential toxins based on clinical signs or symptoms. It also includes a NEW color insert with 85 full-color photographs of toxic plants and of lesions associated with various poisonings. Written by respected veterinarian Michael E. Peterson and board-certified veterinary toxicologist Patricia A. Talcott, along with a team of expert contributors, this edition covers a wide variety of topics including toxicodynamics, toxicokinetics, effective history taking, recognizing clinical signs of toxic exposures, managing emergencies, and supportive care of the poisoned patient. Comprehensive coverage of toxins/poisons includes the full range of substances from acetaminophen to zinc, including home products, prescription medicines, recreational drugs, and more. Guidelines to evaluation, diagnosis and treatment include examinations of the source, toxic dose, toxicokinetics, clinical signs, minimum database, confirming tests, treatment progress and differential diagnosis for each specific toxicant. Coverage of common poisonous substances includes grapes and raisins, nicotine, mercury, mushrooms, Christmas-time plants, and snake and spider venoms. Toxicological Concepts section provides information on toxicologic principles such as history taking, providing supportive care, and managing emergency treatment. General Exposures section addresses nontraditional toxicology such as indoor environmental air, pesticides, pharmaceuticals, and toxicities in pregnant and lactating animals. Miscellaneous Toxicant Groups section covers commonly encountered specific toxicants, the proper use of diagnostic laboratories, use of human poison control centers, and antidotes for specific toxins. More than 50 international contributors provide up-to-date, authoritative advice on treating poisonings and intoxications. 8 NEW chapters cover topics including legal considerations in toxicology cases, responding to mass exposures, and poisonings in birds, small mammals, and geriatric patients. NEW color insert shows 85 of the most commonly encountered toxic substances for at-a-glance identification. UPDATED Signs and Symptoms index makes it easier to find information on a toxic agent by presenting signs rather than requiring the formulation of a diagnosis. UPDATED information on agents most likely to cause a toxic reaction includes natural flea products and an expanded section on human medications. NEW quick-access format with bold headings and convenient tables and boxes allows quick retrieval of information in emergency situations.
