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최금찬,전기일,미키오, 카사하라 동아대학교 환경문제연구소 1990 硏究報告 Vol.13 No.1
Dry and wet deposition were considered for aerosol particles. In wet deposition, aerosol particles are become nuclei to make cloud particles, the generated cloud paticles are removed by settling as rainfalls. Also, gases are absorbed in cloud particles and rainfalls in the atmosphere. In dry deposition, deposition rate is largely depends on the deposited surface areas and its properties. Some dispersion models are able to apply to obtain good results for dry and wet deposition.
대기 중 휘발성 유기화합물의 Advanced Technology에 대한 실험비교
최금찬,안병주,김석택,김찬훈,정창훈,서정민,유수영 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1
Nowaday, Advanced technology has been applied to organic destruction technologies that are alternatives to incineration. Plasma, photolysis, and Photocatalytic oxidation processes are an emerging advanced technologies for the abatement of volatile organic compounds(VOCs) in atmospheric pressure air streams, so we has been used these technologies for destruction of VOCs. TCE, Benzene, Toluene, and Xylene were selected as objective materials. We have been studied each process and found many types of reaction parameters which effect on treatment efficiency. So combination processes, which are plasma-photocatalytic oxidation process and photolysis-photocatalytic oxidation process, have been used to increase destruction efficiency. Analysis of above materials and byproducts was carried out by GC-FID.
최금찬,성낙창,김장호,서정민,황성욱 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1
We get the conclusion of the ionic components of sample and the concentration of metal elements which is collected for acid composition substances using Dry Deposion, Dust Jar method at five points in Pusan. It appears higher ionic concentration from the last of February to the middle of May. It appears higher ionic concentration according to the increasing of collecting period in cation. It is higher ionic concentration according to the passing of the time at all sites in anion. The sum of cation equivalent concentration is higher than the sum of anion equivalent concentration in comparing ionic equivalent concentration. The equivalent concentration of SO₄^(2-), NO^(3-) that is gussed acid density is predominient in anion.
플라즈마 광촉매 복합 공정을 이용한 악취물질 중 TEA, MEK의 분해처리
최금찬,정창훈 한국환경과학회 2003 한국환경과학회지 Vol.12 No.12
Plasma-photocatalytic oxidation process was applied in the decomposition of Triethylamine(TEA) and Methyl ethyl ketone(MEK). Plasma reactor was made entirely of pyrex glass and consists of 24 mm inner diameter, 1,800 mm length and discharge electrode of 0.4 mm stainless steel. And initial concentrations of TEA and MEK for plasma-photocatalytic oxidation are 100 ppm. Odor gas samples were taken by gas-tight syringe from a glass sampling bulb which was located at reactor inlet and outlet, and TEA and MEK were determined by GC-FID. For plasma process, the decomposition efficiency of TEA and MEK were evaluated by varying different flowrates and decomposition efficiency of TEA and MEK increased considerably with decreasing treatment flowrates. For photocatalytic oxidation process, also the decomposition efficiency of TEA and MEK increased considerably with decreasing treatment flowrates. The decomposition efficiency of MEK was 57.80/0, 34.2%, 18.8% respectively and the decomposition efficiency of TEA was reached all 100%. This result is higher than that of plasma process only. From this study, the results indicate that plasma-photocatalytic oxidation process is ideal for treatment of TEA and MEK.
디젤자동차배출입자의 발생원동정 및 배출특성에 관한 연구
최금찬,조정구 동아대학교 환경문제연구소 1991 硏究報告 Vol.14 No.2
The purpose of this study is to characterize the emission of diesel vehicles. It had been measured the particle size distribution, particle concentrations, and ionic components through the emission for diesel vehicles. The particle emission of diesel vehicles may be changed to emission partterns accoring to fuel, combustion conditions, and ionic components.
최금찬,유수영,전보경 한국환경보건학회 2000 한국환경보건학회지 Vol.26 No.2
This study has been carried out to determine the seasonal characteristics of concentration of various ionic (CI-, NO3-, SO42-, Na+, NH+, K+, Ca2+) and heavy metallic (Pb, Mn, Cu, Ni) species in Pusan from August 1997 to April 1998. The concentrations of CI-, Na+, K+ were higher during summer with 2.98 /㎥. Seasonal variation of total concentration of but the concentration of NH4+ was higher during winter with 2.46 /㎥. Seasonal variation of total concentration of heavy metals(Pb, Cu, Mn, Ni) were 186.0 ng/㎥ in summer, 222.6 ng/㎥ in autumn, and 135.83 ng/㎥ in winter. Over the seasons inspected, the concentration of Mn was higher in coarse particles than fine particles and concentration of Ni was higher in fine particles than coarse particles. during yellow sand period, the concentration of TSP was increased about two times than that of other period. SO42-, Ca2+ concentrations were higher than other ionic components because of soil particles. The concentration of Ni showed 94.62ng/㎥ was increased about 4~5 times than other period. Principal component of the yellow sand, SO42-, Ca2+ could be discreased by rainfall and washout effect of atmospheric aerosol was higher in coarse particles than fine particles. Results from PCA(principal component analysis) showed that major pollutant was NaCl by seasalt particulate and (NH4)2SO4.