Atmospheric Degradation
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Atmospheric Degradation
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Author :
language : en
Publisher:
Release Date : 2018-05
Atmospheric Degradation written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05 with categories.
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.
Atmospheric Degradation Of Organic Substances
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Author : Walter Klöpffer
language : en
Publisher: John Wiley & Sons
Release Date : 2008-01-08
Atmospheric Degradation Of Organic Substances written by Walter Klöpffer and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-08 with Science categories.
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.
Atmospheric Degradation And Corrosion Control
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Author : Philip A. Schweitzer, P.E.
language : en
Publisher: CRC Press
Release Date : 1999-07-09
Atmospheric Degradation And Corrosion Control written by Philip A. Schweitzer, P.E. and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-07-09 with Mathematics categories.
This volume offers solutions to the problems associated with atmospheric corrosion by covering corrosion theory, the mechanisms and effects of corrosion on specific materials, and the means of protecting materials against atmospheric conditions. It assesses the financial cost of protecting construction materials against the elements and it considers temperature, humidity, and the presence of contaminants in the air to optimize the ability of materials to withstand the influence of weathering.
Atmospheric Degradation Mechanism Of Organic Sulfur Compounds
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Author : Thorsten Benter
language : en
Publisher:
Release Date : 2002
Atmospheric Degradation Mechanism Of Organic Sulfur Compounds written by Thorsten Benter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
The Atmospheric Degradation Of Chlorinated Alkanes Andaromatic Compounds
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Author : F. Markert
language : en
Publisher:
Release Date : 1993
The Atmospheric Degradation Of Chlorinated Alkanes Andaromatic Compounds written by F. Markert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Atmospheric Degradation Of Aromatic Compounds
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Author : Mads Peter Sulbæk Andersen
language : en
Publisher:
Release Date : 2002
Atmospheric Degradation Of Aromatic Compounds written by Mads Peter Sulbæk Andersen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Atmospheric Degradation Mechanisms Of Hydrogen Containing Chlorofluorocarbons Hcfc And Fluorocarbons Hfc
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-08-16
Atmospheric Degradation Mechanisms Of Hydrogen Containing Chlorofluorocarbons Hcfc And Fluorocarbons Hfc written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-16 with categories.
The current knowledge of atmospheric degradation of hydrogen containing chlorofluorocarbons (HCFC 22 (CHClF2), HCFC 123 (CHCl2CF3), HCFC 124 (CHClFCF3), HCFC 141b (CFCl2CH3), HCFC 142b (CF2ClCH3)) and fluorocarbons (HFC 125 (CHF2CF3), HFC 134a (CH2FCF3), HFC 152a (CHF2CH3)) is assessed. Except for the initiation reaction by OH radicals, there are virtually no experimental data available concerning the subsequent oxidative breakdown of these molecules. However, from an analogy to the degradation mechanisms of simple alkanes, some useful guidelines as to the expected intermediates and final products can be derived. A noteable exception from this analogy, however, appears for the oxi-radicals. Here, halogen substitution induces new reaction types (C-Cl and C-C bond ruptures) which are unknown to the unsubstituted analogues and which modify the nature of the expected carbonyl products. Based on an evaluation of these processes using estimated bond strength data, the following simplified rules with regards to the chlorine content of the HCFC's may be deduced: (1) HCFC's containing one chlorine atom such as 22 and 142b seem to release their chlorine content essentially instantaneous with the initial attack on the parent by OH radicals, and for HCFC 124, such release is apparently prevented; (2) HCFC's such as 123 and 141b with two chlorine atoms are expected to release only one of these instantaneously; and the second chlorine atom may be stored in potentially long-lived carbonyl compounds such as CF3CClO or CClFO. Zellner, Reinhard Unspecified Center ...
Atmospheric Degradation Of Aromatic Compounds
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Author : Mads Peter Sulbæk Andersen
language : en
Publisher:
Release Date : 2002
Atmospheric Degradation Of Aromatic Compounds written by Mads Peter Sulbæk Andersen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Atmospheric Degradation Mechanisms Of Organic Sulphur Compounds
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Author : Cecilia Arsene
language : en
Publisher:
Release Date : 2001
Atmospheric Degradation Mechanisms Of Organic Sulphur Compounds written by Cecilia Arsene and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Atmospheric Degradation Mechanisms Of Hydrogen Containing Chlorofluorocarbons Hcfc And Fluorocarbons Hfc
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Author : R. Zellner
language : en
Publisher:
Release Date : 1989
Atmospheric Degradation Mechanisms Of Hydrogen Containing Chlorofluorocarbons Hcfc And Fluorocarbons Hfc written by R. Zellner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Atmospheric chemistry categories.