Air Pollution by Dr. H. van Dop, Prof. Dr. P. Fabian, Dr. H. Güsten, Dr. J.

By Dr. H. van Dop, Prof. Dr. P. Fabian, Dr. H. Güsten, Dr. J. M. Hales, Dr. A. Wint (auth.)

Environmental Chemistry is a comparatively younger technology. curiosity during this topic, despite the fact that, is becoming very speedily and, even though no contract has been reached as but in regards to the targeted content material and bounds of this interdisciplinary self-discipline, there seems to be expanding curiosity in seeing environmental issues that are in keeping with chemistry embodied during this topic. one of many first targets of Environmental Chemistry has to be the examine of our surroundings and of usual chemical strategies which happen within the setting. a big function of this sequence on Environmental Chemistry, for this reason, is to provide a fairly uniform view of varied points of the chemistry of our environment and chemical reactions taking place within the setting. the economic actions of guy have given a brand new size to Environmental Chemistry. we now have synthesized and defined over 5 million chemicals and chemical produces approximately hundred and fifty million a whole lot man made chemical compounds each year. We send billions of hundreds oil in keeping with 12 months and during mining operations and different geophysical changes, huge amounts of inorganic and natural fabrics are published from their usual deposits. towns and metropolitan parts of as much as 15 million population produce huge amounts of waste in really small and constrained components. a lot of the chemical items and waste items of recent society are published into the surroundings both in the course of construction, garage, delivery, use or final disposal. those published fabrics perform traditional cycles and reactions and often bring about interference and disturbance of common systems.

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41 C2F 6 (CFC-1l6) . . . . . . 42 C2F 3Cl 3 (CFC-l13) and C2F 4 Cl 2 (CFC-114) 42 C2F sCI (CFC-115) and CF 3CI (CFC-13) . 43 Methyl Bromide (CH3Br) and CF3Br (CFC-13 Bl) 45 Methyl Iodide (CH3I) 46 Concluding Remarks 47 Acknowledgements 49 References. . . 49 Summary This report reviews the present knowledge about all halocarbon species that contribute to the stratospheric halogen budget. Since review articles published in earlier volumes ofthis handbook [13, 14] cover topics such as production processes, use patterns, the distribution in waters and biological systems, this chapter focuses on the atmospheric aspects, on budgets and the global distribution in the troposphere and stratosphere.

This is most likely due to the fact that these measurements were made at 32° N, where interferences with the tropical circulation often occur. Because of intensive upwelling motions in the tropics which counteract the photochemical losses, mixing ratios of source gases such as CFC-ll and CFC-12 decrease more gradually there than P. Fabian 36 40 1--1 =0 30 E ,:,c. S. The vertical distribution ofCH 3 Cl in the atmosphere. Each symbol represents data from a different group of investigators. The time of measurement is also given in the figure.

42 C2F 3Cl 3 (CFC-l13) and C2F 4 Cl 2 (CFC-114) 42 C2F sCI (CFC-115) and CF 3CI (CFC-13) . 43 Methyl Bromide (CH3Br) and CF3Br (CFC-13 Bl) 45 Methyl Iodide (CH3I) 46 Concluding Remarks 47 Acknowledgements 49 References. . . 49 Summary This report reviews the present knowledge about all halocarbon species that contribute to the stratospheric halogen budget. Since review articles published in earlier volumes ofthis handbook [13, 14] cover topics such as production processes, use patterns, the distribution in waters and biological systems, this chapter focuses on the atmospheric aspects, on budgets and the global distribution in the troposphere and stratosphere.

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