Removal Processes of Gaseous and Particulate Pollutants

  • G. M. Hidy


In an age of increasing pressures placed on the earth’s resources, there is great concern for the atmosphere’s ability to cleanse itself of anthropogenically generated material. Indeed, the earth’s atmosphere has been overloaded locally with pollution, particularly over cities, to create rather unhealthy and aesthetically unpleasant living conditions. On larger scales, there is conflicting evidence of man’s intrusion into the natural composition of the atmosphere. Perhaps the best evidence for anthropogenically stimulated imbalances between production and removal of trace constituents are the data on the continuing increase of carbon dioxide in the air. A variety of different observations has indicated that the atmospheric CO2 concentration has increased at a rate of about 0.2% per year during the period between 1958 and 1969 [1]. Other evidence such as that reported for global decreases in visibility is less well documented, and independent evidence of emission surveys does not confirm a serious increase in global haze development by anthropogenic sources [1,6].


Aerosol Particle Removal Process Deposition Velocity Cloud Droplet Liquid Water Content 
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Copyright information

© Plenum Press, New York 1973

Authors and Affiliations

  • G. M. Hidy
    • 1
    • 2
  1. 1.North American Rockwell Science CenterThousand OaksUSA
  2. 2.California Institute of TechnologyPasadenaUSA

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