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- 저자 : 유승화(Yoo Seong Wha) (검색결과 3 건)
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국내 전철 및 가전제품을 대상으로 한 전자장 수준 실태조사
장성기 ( Seong Ki Jang ),조용성 ( Yong Sung Cho ),이석조 ( Seok Jo Lee ),유승화 ( Seong Wha Yoo ),정경미 ( Kyung Mi Jung ),임준호 ( Jun Ho Lim ) 한국산업위생학회 2005 한국산업보건학회지 Vol.15 No.1
The purposes of this study was to collect, analyze, and describe the MF exposure levels from subways in Korea and to measure and evaluate the MF levels generated from electric appliances used at general homes. The target subway lines were Seoul Metropolitan Line 1 to Line 8, Bundang Line, Incheon Line, Daegu Line, Gwangju Line, and Busan Line 1 and Line 2. We measured at each station in those subway lines and, all the train types (pantograph-equipped, motor-equipped, and common), and platform types(facing and isolating) were investigated by the distance(80, 200, 400 cm) from the train on 19 targeted subway lines using 3 magnetic field measuring devices (EMDEX Ⅱ, Enertech Co.) during the survey from January till October, 2004. On the other hand, the levels of the 60Hz magnetic fields generated from 14 items of home electric appliances such as electric blankets, hair dryers, electric razors, etc. were measured at 10 general homes using 5 EMDEX Ⅱ meters with a sampling interval of 1.5 second by the distance(surface, 30, 50, 100, 300 cm) from the target electric appliances. The survey results in the whole subway lines examined in this study were as follows; Seoul Metropolitan Line 4 using AC(alternating current) power source showed the highest mean value of 2.85 μT, followed by Seoul Metropolitan Line 1 running between Seoul and Incheon using AC(2.78 μT), Seoul Metropolitan Line 1 between Seoul and Uijongbu using AC(2.73 μT), Bundang Line using AC(1.79 μT), Seoul Metropolitan Line 1 connected from Yongsan using AC(1.67 μT), Seoul Metropolitan Line 1 between Seoul and Suwon using AC(0.79 μT), and so on. In general, the intensity of the magnetic field in the subway systems in Korea was significantly higher when using AC(2.14±0.91 μT) than when using DC(0.29±0.44 μT) power source. Among the home electric appliances examined, microwave ovens showed the highest mean value of 7.69 μT, followed by hair dryers(6.47 μT), vacuum cleaners(5.27 μT), televisions (2.26 μT), electric blankets(1.38 μT), personal computers (0.81 μT), and so on. Two items of electric appliances showed the excess value of 0.2 μT at the distance of 30cm in the MF exposure level; electric razors 1.58±2.13 μT and vacuum cleaners 0.48±0.44 μT. As a whole, this study showed a tendency that the shift of the MF levels according to the increase of distance from the electric appliances was lower than those of the results surveyed in UK and USA. As a result, this study is expected to suggest meaningful data for the future study in exposure assessment of magnetic fields and for the establishment of guidelines for subways and electric appliances in Korea. More detailed and large scaled exposure assessment studies should be performed continuously to get the various and useful information on health risk assessment of MFs in Korea.
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장성기(Seong Ki Jang),이석조(Seock Jo Lee),유승화(Seung Wha Yoo),정경미(Kyung Mi Jung),류정민(Jung Min Ryu) 한국실내환경학회 2004 한국실내환경학회지 Vol.1 No.1
Recently, concern about Sick House Syndrome (SHS) has been increased in Korea. And it is suspected that formaldehyde (HCHO) and volatile organic compounds (VOCs) are major factors for SHS. This study was surveyed the indoor air quality in new apartments in Korea. The HCHO and VOCs were measured at 90 sites and analysed by HPLC-UV and GC/MS, respectively. The range of HCHO concentrations at 90 sites were 9.39∼248.78㎍/㎥ and the mean value 105.41㎍/㎥ and the concentrations of HCHO at 42 sites (46.7%) exceeded the indoor air quality guideline (100㎍/㎥) in Japan. Among the 4 VOCs, toluene concentrations were the highest and the mean value 127.33㎍/㎥ and that concentrations at 12 sites (13.8%) were exceeded the indoor air quality guideline (260㎍/㎥) in Japan. There was a tendency which the longer the movement and measurement period is, the more the pollutants concentration is decreased. HCHO and VOCs concentrations of domestic results was similar to Japan"s survey results in 2000.
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