건설기계류 소음 특성

강대준(Daejoon Kang),이우석(W. S. Lee),이재원(J. W. Lee),이석조(S. J. Lee),홍준기(J. K. Hong) 한국소음진동공학회 2004 한국소음진동공학회 학술대회논문집 Vol.2004 No.5

철강산업 용융로의 대기오염물질 배출계수 산정 연구

석광설,방선애,홍지형,이석조,김대곤,이대균,허정숙,이은정 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.4

The purpose of this study is 10 estimate of emission factors of the air pollutants for the melting furnaces for the iron and steel industry. The result of this study is able to obtain the emission factor of particulate matters (PM), sulfur dioxide, nitrogen oxides for melting furnace. The emission factors of each pollutants were as follows: - the emission factor varied between 6.13E-03 ∼ 6.12E-01kg/ton for PM - 1.59E-01 ∼ 2.45E+00kg/ton for S0₂ - 6.82E-02 ∼ 6.88E-01kg/ton for NOx, respectively. Analysis of the differences in the emission factors of ours and U.S. EPA's yielded the following results for the Wilcoxon method: p>0.05. The statistical analysis showed no differences in the our emission factors and U.S. EPA's

2001년 11월 오염시기와 2002년 봄 황사시기 제주도 고산에서의 미량원소 농도 변화

한진석,김영성,문광주,안준영,김정은,류성윤,김영준,공부주,이석조 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.2

The chemical composition of PM_(2.5) was measured at Gosan. Jeju for two weeks each in November 2001 and spring 2002. In the latter part of the measurement period of November 2001, designated as the polluted period in this work, secondarily formed ion components as well as primarily emitted elemental carbon were high, PM_(2.5) mass concentration was also high in this polluted period compared with the yellow sand period, in which daily average of PM_(10) peaked up to 520㎍/㎥. Increase of major components of anthropogenic origin in the polluted period was not correlated with the variation in sea salt components while increase of crustal components in the yellow sand period was highly correlated with the variation in sea salt components. Trace elements were generally higher in the yellow sand period: however, toxic heavy metals such as zinc, cadmium and lead were the highest in the polluted period.

한반도 서해상으로 장거리 이동하는 SO₂의 농도 및 연직분포 특징

한진석,안준영,홍유덕,공부주,이석조,선우영 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.5

This study was carried out to understand long-range transport of SO₂ using aircraft measurements for the identification of it's horizontal and vertical concentration and distribution pattern. Thirteen missions of aircraft measurements have been done around 37˚00′/124˚30′ from October 1997 to November 2001. Concentrations of SO₂ was 1.5~2.0 ppb in the below mixing layer, 0.6~1.1 ppb in the above mixing layer. SO₂was found to be relatively higher than marine background level, 0.08~0.2ppb, indicating the western coast being influenced by long-range transport except for the summer season. The vertical distribution of SO₂was classified into 3 groups using its vertical sounding and meteorology pattern; the first is linear decay pattern, the second is exponential decay pattern, and the last is gaussian distribution pattern in the below mixing layer, 2 patterns of linear decay and gaussian distribution patterns in the upper layer. It is founded that vertical distribution pattern is strongly dependent on meteorological condition, for example atmospheric stability and predominant air flow.

2000~2002년 우리나라에서 관측된 황사의 화학 조성 및 특성

신선아,한진석,홍유덕,안준영,문광주,이석조,김신도 한국대기환경학회 2005 한국대기환경학회지 Vol.21 No.1

The ambient TSP data measured at Seoul, Incheon, Taean, Daegu, Busan in Korea were used to explain the chemical composition and general features of Asian Dust (AD) observed in Korea. 9 episodes out of 19 were sampled from 2000 through May 2002, and measurements were conducted covering ionic and metal components with mass concentration. The results showed that daily averaged mass concentration (TSP) during the AD episodes was 458 ㎍/m₃, and ionic and metal concentrations were 27.93 ㎍/m₃ and 71.7 ㎍/m₃, respectively, accounting for 6.1% and 15.5% of the total aerosol mass. TSP concentrations during episodes were varied from 120 to 1742 ㎍/m₃ according to the impact of Asian Dusts and had a tendency of showing higher values at sites in the west side of Korea, which can be explained by the effect of diffusion and deposition. In this study, ionic components like Ca (NO₃)₂, CaSO₄, NaNO₃, Na₂SO₄ were prominent types in secondary aerosol during AD periods and also indicated that V, Co as well as soil elements such as Ca, Fe, Mg, Mn, K correlated well with Al, while Cu, Cd, Pb, Zn didn’t agree well with it. In addition, enrichment factors (EFs) for each metal component were obtained to provide simple information about source contribution of Asian Dust, and the results were compared with those from other AD studies. In this study, the results showed that aerosol properties in Korea during the Asian Dust were considerably different from those of general atmospheric condition and specially varied from case to case rather than site to site, which implies that there are certain variations in the soil of source region, pathways of air mass, and meteorologicalcondition. For the enhanced study, those factors should be combined with the features of Asian Dust resolved from this study.

화력발전소의 대기오염물질 배출계수 산정 연구

김대곤,엄윤성,홍지형,이석조,석광설,이대균,이은정,방선애 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.3

The main purpose of this study was to characterize the air pollutants emission factors in electric power plant (EPP) using fossil fuels. The electric power plant is a major air pollution source, thus knowing the emission characteristics of electric power plant is very important to develop a control strategy. The major air pollutants of concern from EPP stacks are particulate matter (PM), sulfur oxides (SOx), nitrogen oxides (NOx), carbon monoxide (CO) and heavy metals. Throughout the study. the following results arc estimated: - PM : 8.671E-05∼8.724E+01 PM emission (kg) per fuel burned (ton) - SOx: 4.749E-04∼7.877E+01 SOx emission (kg) per fuel burned (ton) - NOx : 1.578E-02∼9.857E+00 NOx emission (kg) per fuel burned (ton) - CO : 3.800E-04∼1.291E+00 CO emission (kg) per fuel burned (ton) - Hg : 1.220E+01∼3.108E+02 Hg emission (mg) per fuel burned (ton) From the statistical analysis by Wilcoxon signed ranks test between the emission factors of ours and U.S. EPA's. we can yielded that: p > 0.05.

지역 대기질 측정망에 나타난 국내 대기오염도의 최근 동향 : 2002년 고농도 사례 및 그 기상 특징 High Air Pollution Concentration Episodes and Their Meteorological Characteristics in 2002

김철희,박일수,이석조,김정수,진형아,성한규 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.2

We report the high concentration episodes for PM_(10), SO₂ NO₂ and O₃ in many urban areas Korea during 2002. The high concentration episodes are identified based on the National Ambient Air Quality Standards and the observations obtained from the Regional Air Monitoring Network composed of approximately 160 air pollution monitoring stations located in a number of major or big cities in South Korea including Seoul, Pusan, Daegu, and Incheon cities. The results show that the twenty cases of high concentration episodes in 2002 consists of both ozone warning episodes (6 cases) and high PM_(10) concentration cases (14 cases), and one half of the latter are found to occur in association with the Yellow Sand (Asian Dust) phenomena. The most outstanding characteristics of the reported episodes are the excessively high levels of maximum PM_(10) concentrations during the Yellow Sand period (i.e.. exceeding 3.000㎍/㎥ in April, 2002) and their variable occurrence frequencies across seasons. The high ozone concentration episode days are mainly resulting from both the high photochemical reactions and poor ventilations. The high PM_(10) concentration days during non Yellow Sand periods, however, mostly occurred under the influence of synoptic meteorological conditions such as stagnant or slowly passing high pressure centers, and consequently prevailing weak wind speeds over the Korean peninsula. The overall results of our study thus suggest the importance of both synoptic and local meteorological factors for high concentration levels in the major and/or big cities in Korea.