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KMID : 0378019630060030079
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New Medical Journal
1963 Volume.6 No. 3 p.79 ~ p.83
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Dust Particles in the Open Air and Exhaust Gases of Motor Vehicles in Seoul City
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Bin Soon-Duk
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Abstract
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Because of rapid growth of population with together expansion of industrial, commercial, domestic and transportation activities, a problem of air pollution has become of greater concern among seoulites. Unless action is taken or continued to control pollution emissions, pollution levels in the area will most certainly be higher in the future than they are today. In addition, the excessive amount of briquette ashes dumped at domestic roadsides during the cold season has led to the high levels of dustfall and suspended particulate matters. In Seoul city dust and sulfur dioxide seems to be major air contaminants, though the elucidation of the relationship between atmospheric contamination and the sickness experience of exposed population requires further study.
This paper covers findings on dust survey at specified locations and also analytical data on exhaust gases emitted from motor vehicles. Dust samples were collected at five geographical locations including Ulchi-Ro, Sejong-Ro, Seoul railway station, Dongdae-Mun, this college campus ground, with the M.S.A. Midget Impinger (L.Greenburg and G.W. Smith). Sedgwick Rafter cells were used for dust counting. Exhaust gases were likewise collected and analysed with the Orsat´s Gas Analyser for detecting CO gas. S02 of emitted gases was measured with the Midget Impinger and aldehydes thereof was determined with the method using chromotropic acid. The survey period for air dust was 10 to 24 January 1963 and for the exhaust gases was 15 August to 15 October 1962, A summary is presented hereunder.
1 The average number of dust particles at surveyed areas was 21.626. 1 mppcf and was highest at the front of Seoul railway station and lowest at this college area (Hewha-Dong). Dusts in the air increase morning and evening, while on the contrary, decrease midnight through early dawn.
2. Air dusts during winter season increase about twice as much as that of summer time.
3. The amount of CO2, CO, 502. and formaldehyde contained in the exhaust gases emitted from vehic-Ies differs greatly according to type of cars, gasoline or diesel engines (See table 2)
4. Gasoline engines generate more CO2 as trebled that of diesel engines. The amount of S02 emitted from diesel engines is seven times higher than is in gasoline cars.
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