Author: Walter Klöpffer Publisher: John Wiley & Sons ISBN: 3527611622 Category : Science Languages : en Pages : 258
Book Description
This compilation on the degradation of 1,100 commercially important chemical products is the first publication to make this knowledge publicly accessible in one book. The data and annotations have been painstakingly assembled over a 10-year period in a collaboration between academia and regulatory authorities. The work explains in detail the methods, including computational ones, for the environmental assessment of volatile and semi-volatile substances, and is rounded off with data tables of degradation rates. A key resource for manufacturers and regulators of such substances.
Author: Publisher: ISBN: 9781642240559 Category : Languages : en Pages : 314
Book Description
Earth's atmosphere holds a mass of organic compounds, which differ by orders of magnitude regarding fundamental properties such as volatility, reactivity, and propensity to form cloud droplets, affecting their impact on global climate and human health. Volatile organic compounds (VOCs) play a vital role in the chemistry of the atmosphere by impelling ozone and hydroxyl radical (OH) concentrations and the renovation rates of nitrogen oxides (NOx). Elevated levels of VOCs and NOx have led to an approximate doubling of ozone in the lower troposphere over the past couple of centuries, making tropospheric ozone the third most important anthropogenic greenhouse gas after carbon dioxide (CO2) and methane. Monitoring of volatile organic compounds (VOCs) is a key piece in understanding photochemical air quality in urban atmosphere. Anthropogenic sources such as incomplete combustion of organic substances, the use of petrochemical solvents, and vaporizations of petroleum products are sources of VOCs. Every day, large quantities of volatile organic compounds (VOCs) are emitted into the atmosphere from both anthropogenic and natural sources. Therefore, their sources, sinks and dwelling times are the subject of current research. Atmospheric Degradation of Organic Substances describes the current state of knowledge of the chemistry of VOCs as well as the methods and techniques to analyze gaseous and particulate organic compounds in the atmosphere. The book also includes evaluation of the relative ozone-forming potentials of the captured VOC species in the atmosphere of urban settlement. The analytical toolbox available for chemists to study atmospheric organic compounds has expanded considerably during the past decade, opening new windows into speciation, time resolution and detection of reactive and semi-volatile compounds at low concentrations. This has provided unprecedented opportunities, but also revealed new scientific challenges.This book is of interest to students, practitioners, as well as guiding tool for researchers in the field of atmospheric research.
Author: R M Harrison Publisher: Royal Society of Chemistry ISBN: 1847552315 Category : Science Languages : en Pages : 156
Book Description
Interest in volatile organic compounds (VOCs) as air pollutants has increased dramatically in recent years. This book covers a number of very topical issues concerning VOCs, including stratospheric ozone depletion due to CFCs, and the properties of alternative substances; the role of VOCs in the photochemical formation of lower atmosphere (tropospheric) ozone; and the problem of the direct toxicity of VOCs such as benzene and formaldehyde. This Issue reviews our current knowledge of VOCs, drawing upon the expertise of renowned experts and major national and international research programmes. It examines man-made and natural sources, as well as pathways and chemical reactions in the atmosphere. It also looks closely at the sources and concentrations of VOCs indoors, where humans are most likely to be exposed to them. Volatile Organic Compounds in the Atmosphere describes techniques used for the calculation of emissions inventories and strategies for control, and explores the many Government policy matters relating to VOCs. It provides readers with in-depth, clearly explained coverage of the many complex scientific and policy issues surrounding VOCs in the atmosphere.
Author: Ralf Koppmann Publisher: John Wiley & Sons ISBN: 0470994150 Category : Science Languages : en Pages : 512
Book Description
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.
Author: James G. Speight Publisher: Butterworth-Heinemann ISBN: 0128011424 Category : Technology & Engineering Languages : en Pages : 592
Book Description
Environmental Inorganic Chemistry for Engineers explains the principles of inorganic contaminant behavior, also applying these principles to explore available remediation technologies, and providing the design, operation, and advantages or disadvantages of the various remediation technologies. Written for environmental engineers and researchers, this reference provides the tools and methods that are imperative to protect and improve the environment. The book's three-part treatment starts with a clear and rigorous exposition of metals, including topics such as preparations, structures and bonding, reactions and properties, and complex formation and sequestering. This coverage is followed by a self-contained section concerning complex formation, sequestering, and organometallics, including hydrides and carbonyls. Part Two, Non-Metals, provides an overview of chemical periodicity and the fundamentals of their structure and properties. Clearly explains the principles of inorganic contaminant behavior in order to explore available remediation technologies Provides the design, operation, and advantages or disadvantages of the various remediation technologies Presents a clear exposition of metals, including topics such as preparations, structures, and bonding, reaction and properties, and complex formation and sequestering
Author: Ian Barnes Publisher: Springer ISBN: 940075034X Category : Science Languages : en Pages : 355
Book Description
Oxides and acids of nitrogen play an important role in regulating atmospheric radical levels, in particular, that of the OH radical the main initiator of the degradation of chemicals in the atmosphere. A comprehensive overview on the methods used to measure nitrogen oxides and acids in the troposphere is given and difficulties and artefacts associated with the use of the techniques for measurements in urban and mega city environments is illustrated. State-of-the-art methods for the measurement of OH and HO2 radicals are reviewed and recently recognised difficulties, in particular with the measurement of HO2 radicals, are highlighted. Other contributions to the book cover our present understanding of the gas, aqueous and particulate/aerosol phase atmospheric degradation chemistry of volatile organic compounds (VOCs) under NOx conditions typical of rural, urban and mega city environments. Examples of measurements of NOx and VOCs in the atmospheres of these environments are given, in particular for the megacities Cairo and Beijing, in conjunction with modelling studies which attempt to simulate the field observations using state-of-the art knowledge on the chemistry of the VOCs and radical levels.
Author: W. Seiler Publisher: Springer Science & Business Media ISBN: 9401003998 Category : Science Languages : en Pages : 492
Book Description
The formation, transport and impact of photo-oxidants, e.g., ozone, is a major environmental problem in densely populated areas with corresponding high emissions of ozone precursor substances such as NOx and volatile organic carbon compounds (VOC). Although major progress has been achieved within the last decade, there are still significant uncertainties in our understanding of the chemical behavior of the polluted atmosphere, in particular the interaction between cities and surrounding areas as well as the contribution of pollution to the global changes, e.g., the oxidation capacity of the troposphere. This book focuses on specific issues related to the chemistry of polluted atmospheres. The main issues cover areas such as modelling, emission inventories, chemical transformation as well as transport of pollutants on an urban/regional scale. The overall topic of the book is addressed in an interdisciplinary approach. The book is of specific interest for advanced researchers in tropospheric chemistry, from the PhD or post-doctoral levels and beyond.
Author: National Research Council Publisher: National Academies Press ISBN: 0309144019 Category : Nature Languages : en Pages : 248
Book Description
Recent advances in air pollution monitoring and modeling capabilities have made it possible to show that air pollution can be transported long distances and that adverse impacts of emitted pollutants cannot be confined to one country or even one continent. Pollutants from traffic, cooking stoves, and factories emitted half a world away can make the air we inhale today more hazardous for our health. The relative importance of this "imported" pollution is likely to increase, as emissions in developing countries grow, and air quality standards in industrial countries are tightened. Global Sources of Local Pollution examines the impact of the long-range transport of four key air pollutants (ozone, particulate matter, mercury, and persistent organic pollutants) on air quality and pollutant deposition in the United States. It also explores the environmental impacts of U.S. emissions on other parts of the world. The book recommends that the United States work with the international community to develop an integrated system for determining pollution sources and impacts and to design effective response strategies. This book will be useful to international, federal, state, and local policy makers responsible for understanding and managing air pollution and its impacts on human health and well-being.
Author: Walter Klöpffer
Author: 
Author: R M Harrison
Author: Ralf Koppmann
Author: James G. Speight
Author: James Albert Smith
Author: Ian Barnes
Author: W. Seiler
Author: R. E. Rathbun
Author: National Research Council