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서울지역 일부 대기중 부유먼지에 함유된 탄소 성분과 Benzo(a)pyrene 성분의 농도변동 양상에 관한 연구
황경철,김희강 한국환경보건학회 1997 한국환경보건학회지 Vol.23 No.4
In order to investigate the behavior of particulate carbon and benzo(a)pyrene(B(a)P) in the ambient air, suspended particle matters were collected from April, 1990 to February, 1992, and total carbon(TC), organic carbon(OC), elemental carbon(EC) and B(a)P were measured by an elemental analyzer and a HPLC. The results were as follows the average concentration of TC was 38.6 $\mug/m^3$ and its concentration was higher in winter(45.4 $\mug/m^3$) and fa11(44.3 $\mug/m^3$) than in summer(36.8 $\mug/m^3$) and spring(28.9 $\mug/m^3$). The monthly concentration trends both of EC and OC was similar, but seasonal variation of EC concentrations was larger than that of OC. The average concentration of B (a)P was 2.2 ng/m$^3$, and was higher in winter(4.1 ng/m$^3$) and fall(3.2 ng/m$^3$) than in spring(1.2 ng/m$^3$) and summer(0.6 ng/m$^3$). The seasonal behavior of carbon and B(a)P was to similar except for summer. The correlation coefficient(r) between EC and B(a)P was 0.71, and the correlation coefficient(r) between OC and B(a)P was 0.66.
黃敬喆,呂賢九 동남보건대학 2001 論文集-東南保健大學 Vol.19 No.1
Total Carbon(TC) of ambient air in Seoul has been studied over monthly average concentration using ARIMA model from 1991 to 1995. As result of time series analysis of TC, mean and distribution was not constant with time. In seasonal difference(D=1), PACF was decreased exponentially. It was inferred that seasonal ARIMA model was ARMA(0.1)_12. The final time series model using ARIMA was (1-B^12)×TC_t=(1-0.7489B^12)a_i, TC_t=TC_t + 1.1323 that showed concentration of present TC was effected concentration of TC of 12 month ago and unexplainable a_.?? As a result of estimation of monthly data of TC using final model in 1996, correlation coefficient was 0.73 which conformed high prediction for short-term prediction within one year.
黃敬喆,朴埈徹,金林順 동남보건대학 1999 論文集-東南保健大學 Vol.17 No.2
Noises and Vibrations of the machines that have been used at construction works became the target of investigation. Noises and Vibrations were measured at three points(5, 10, 20m) in a straight line that were based on distance from the source and recorded on magnetic tape at one point(5m). Measured data were analyzed to assess the sound and vibration levels occurred at sources and applied to gain coefficients of equations that were used for predicting sound and vibration level. Noises and vibrations of pile drivers were measured 98.1(Leq, dBA), 108(Lmax, dBA) sound level and 83.8(Leq, dBV), 88.7(Lmax, dBV) vibration level at 5m. Distance attenuation is different each one. Data recorded on tapes were analyzed to understand the characteristics of frequency because these characteristics are important factors to design a plan for installing sound and vibration-proof devices. Central frequency of noise is 2 kHz and that of vibration is 16-63 Hz. Results from these analysis assessment prediction, and methods for propagation characteristics of noises and vibrations emitted from construction works were discussed.
황경철,허우덕,남영중,민병용 한국농화학회 1983 Applied Biological Chemistry (Appl Biol Chem) Vol.26 No.3
An attempt was made to use the fatty acid composition as a basis for the detection of sesame oil adulteration. The ratios of oleic to linoleic acid content(O/L ratios) In six kinds of sesame oil were in the range of 0.74∼0.91. Meanwhile, those of soybean, corn, rapeseed, and cottonseed oils were 0.41, 0.38, 1.05 and 0.29, respectively. The changes on the O/L ratio due to the adulteration up to 20% of with other oil were not noticeable. The adulteration with cottonseed and corn oils, identification was nearly impossible with O/L ratio alone. However, linolenic acid from soybean oil and erueic acid from rapeseed oil were good indication of the sesame oil adulteration. with these oils. The detection limits for adulteration in sesame oil were 5% for rapeseed oil and 10% for soybean oil. Application of this detection method on the 22 samples from market revealed the adultered sesame oil; five with rapeseed and 12 with soybean oil.
黃敬喆,崔載球,李振河 동남보건대학 2002 論文集-東南保健大學 Vol.20 No.2
We took a statistical view of the industrial accidents and the environmental change of industrial safety and health on the basis of the 2001 industrial accidents statistics announced by the Ministry of Labor. The results from careful analysis about the cause of accidental occurrence and its increasement were that new demand population on safety and health of industrial accidents occurred by application and expansion of industrial safety and health act and the fluctuation of the supply and demand of Labor market was on the increase, and new forms of accidents and new occupational disease from the overuse of harmful chemicals and industrial high growth and precision were increasing. and industrial accidents phenomena from the recession of self-control safety management activity after the mitigation of business regulation related to safety and health and reduced investment to safety and health were remarkably increased. Therefore. the support of safety and health management technology to the companies, with frequent accidents small business companies, and flimsy companies to work environment should be strengthened, the prevention to musculoskeletal system disease and encephalon cardiovascular disease should be developed and prevailed, and comprehensive safe plan like training for safety consciousness inspiration to labor should be considered.
수도권지역 하수처리장 슬러지 및 소각시설의 소각재 성분분석과 유해성 오염물질의 배출 특성에 관한 연구
黃敬喆,趙起哲 동남보건대학 2001 論文集-東南保健大學 Vol.19 No.2
This study was conducted to investigate emission characteristics of hazadous pollutants producted from solid waste and sewage sludges at incinerator and waste-water treatment area in Seoul and Kyounggi. In this study we analyzed the concentration of Fe, Pb, Cu Cr^6+, Zn, Mn, Cd, As, Hg, Si, Al, Ti, Ca, Mg, Na and K of sewage sludges in 3 area(WA, WB, WC). Also, we analyzed the component of SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, K₂O, Na₂O, TiO₂, P₂O_5 and Ig.loss Of bottom and fly ashes in incinerators(5 area). SiO₂ which is available to rotect air pollution was estimated high especially in bottom ashes.
黃敬喆,姜忠旻 동남보건대학 2002 論文集-東南保健大學 Vol.20 No.1
The carbon component of the suspended particulates was analyzed and the DRI model was applied to evaluate the contribution of PCC on visibility and smog phenomena in Seoul area. The results of this study are as follows: It was analyzed that the light absorption in PCC was mainly conducted by EC and the light scattering by OC. Also in the calculation on the contribution of PCC to visibility reduction. the annual average contribution rates of EC and OC were 11.4% and 20.4% respectively and it was confirmed that the visibility reduction was mainly contributed by OC. The annual average contribution rate of TC, the sum of EC and OC, was 31.7%. So it was found out that PCC was the main source for visibility aggravation in Seoul area.