This study was aimed to elucidate the cause of odor in a park, which was used for the landfill site about 20 years ago. For this purpose, VOCs concentration was measured using passive sampler at 10 sampling sites around a park for two times (spring and summer). The VOCs concentration measured in summer showed very low concentration and the relative VOCs ratio also showed no special patterns relating with other studies, which was caused to heavy rainfall during the sampling period. However, the relative ratio of toluene concentration of two sampling sites in spring appeared very high relating with other studies. It was thought that the high VOCs concentration in this park was caused not by landfill but by a neighboring painting materials company.

본 연구의 목적은 오미자로부터 순수분리한 리그난이 무의 종자발아 및 유묘생장에 미치는 영향을 조사함으로서 생장조절제와 천연물의 생물검증 방법을 개발하기 위해서 수행하였다. 오미자로부터 순수분리한 schisandrin, schisandrin C, gomisin A 및 gomisin N 등 4종의 리그난이 무 종자의 발아 및 유묘생육에 미치는 영향을 조사하였다. 무 종자를 10-5, 10-6 및 10-7 M의 schisandrin, schisandrin C, gomisin A 및 gomisin N 용액에 1시간 침지 후 발아율을 비교한 결과, 4종의 리그난류 처리는 대조구에 비해 발아속도가 빨랐다. 리그난류의 처리 48시간 후 대조구를 기준으로 하여 발아율의 촉진 또는 억제 효과를 비교한 결과, schisandrin과 gomisin A는 10-6 M의 농도에서, schisandrin C와 gomisin N은 농도가 높을수록 발아율이 억제되는 경향이었다. 리그난이 유묘생육에 미치는 영향을 대조구를 기준으로 하여 생육 촉진 또는 억제 효과를 조사한 결과, 하배축은 gomisin A와 gomisin N의 처리시 10-5 M의 고농도에서, gomisin N의 경우에는 10-6 M에서 생육이 촉진되었으며, 뿌리의 길이는 schisandrin 10-4 M의 고농도에서 가장 길었다. 유식물체당 총 생체중 및 건물중은 10-7 M의 저농도 처리시에 촉진되었으며, schisandrin C는 10-5 M의 고농도 처리시에 생체중과 건물중이 감소하였다. 따라서 오미자로부터 순수분리한 리그난은 종자발아 또는 유묘의 생장을 조절할 수 있는 생장조절제로서 이용가능이 있을 것으로 기대된다.

진도 연안해상교통관제 업무가 2010년 7월 15일 국토해양부에서 해양경찰청으로 이관이 되었다. 본 연구에서는 지난 10개월 간 진도 연안VTS 업무를 하면 일어난 사고와 예방사례 분석하여, 진도 연안의 특성을 파악하고, 안전관리 향상 방안에 대해 제시하고 자 한다.

This study was carried out to suggest a realtime evaluation system for the odor adsorption efficiency with electrochemical sensors. As the results of the experiments for the realtime evaluation system, the correlation coefficient between the sensor signals and the hydrogen sulfide concentration was relatively good, 0.9920 and 0.8340, respectively. The relative standard deviation of three replicative experiments for the adsorption amount in the conditions of 0.5 g and 1.0 g of adsorbent was 6.97% and 3.49%, respectively. This study would contribute the realtime evaluation of odor control efficiency to overcome the limitations of olfactory method and instrumental analysis in terms of cost and technology.

Toluene, xylene, styrene, and ethylbenzene are main volatile organic compounds emitted from painting materials. According with the development of gas chromatography equipment, it has been possible to analyze the low level of ambient VOCs concentration. In this study, the limit of detection and the limit of quantitation were analysed for VOCs originated from painting materials in GC/FID/liquid injection analysis system. The results of %RSD for four standard solutes showed a great reproducibility in terms of detection time and detection area. The limit of detection and the limit of quantitation in SRI GC appeared to be 501.64 pg and 1.67 ppb for toluene, 572.03 pg and 1.90 ppb for ethylbenzene, 1077.22 pg and 3.59 ppb for m,p-xylene, 36563.35 pg and 121.76 ppb for styrene, respectively.

This study aims to produce the threshold values of 12 specified offensive odor substances based on the 3 point comparison method instead of the 2 point comparison method of ASTM or CEN. As a result, the threshold values of individual odor substances, including Methyl mercaptane, Hydrogen sulfide, Trimethylamine, and I-Valeraldehyde ranged between 0.0001∼0.001ppm, while the values of Styrene and Ammonia were relatively higher than of other substances at 1.8ppm and 0.04 ppm respectively. The threshold values of the 12 specified odor substances were compared in Korea and overseas, which showed that the characteristics of olfactory response varied by substance and nation. When it comes to acetaldehyde or hydrogen sulfide, western countries, including the United States, tended to quite insensible compared to Koreans. Japanese people were more sensitive in the 12 specified odor substances than Koreans in general, suggesting that it is not only because of its olfactory ability, but because of the calculation method that produces Japan‘s dilution threshold values approximately 1.5 times as high as Korea"s.

The emission characteristics of VOCs (Volatile Organic Compounds) from assembly metal product manufacturing industry (Korean standard industry classification code: 28) were studied. The sampling was carried out at 54 sites in Shiwha-Banwol industrial area with 3 M OVM (Organic Vapor Monitor) #3500 from August to October in 2008. The EPA 8020/8040 (10 chemicals) was used as a standard solution for the quantitative analysis with GC/FID. As the results, the VOCs concentration appeared to range from 0.9 ppb to 22,721.1 ppb, and the average concentration ratio of benzene : toluene : ethylbenzene : m,p-xylene : o-xylene : styrene appeared to be 0.005 : 1.000 : 0.198 : 0.096 : 0.057 : 0.110. Total VOC concentration of the "Manufacture of Structural Metal Products, Tanks, Reservoirs and Steam Generators" (KSIC code: 281) appeared to be seven times higher than that of "Manufacture of other fabricated metal products; metal working service activities" (KSIC code: 289).

According to the development of GC equipment, it has been possible to analyze the low level of ambient VOCs concentration. In this study, the limit of detection and the limit of quantitation were estimated for two GC equipments of the VOCs analysis, which would contribute to improve the quality of VOCs analysis results. The results of %RSD for ten standard solutes showed a great reproducibility in terms of detection time and detection area. The limit of detection and the limit of quantitation in SRI GC appeared to be 0.175 ppb and 0.583 ppb for benzene, and 0.223 ppb and 0.743 ppb for toluene, respectively. On the other hand, The limit of detection and the limit of quantitation in FISON GC appeared to be 0.149 ppb and 0.496 ppb for benzene, and 0.094 ppb and 0.313 ppb for toluene, respectively.

In this study, VOCs originating from vehicles were measured at 8 underground parking lots(two apartments, four department stores, and two large-scale marts) in Daejeon. The indoor air quality at underground parking lots of the department stores and marts was affected by the availability of the ventilation facility and their operation frequency. At the underground parking lots with a ventilation facility, the maximum VOCs concentration was 727㎍/㎥, and the minimum was 73.5㎍/㎥. The average concentration ratio of BTEX to TVOCs at the underground parking lots was almost constant, which was approximately 44.8%. TVOCs and BTEX were strongly correlated with a correlation coefficient (r) of 0.88. The relative ratio of benzene, toluene, ethylbenzene and xylene was 1 : 9.51 : 0.71 : 2.53, directly reflecting the influence of vehicles sources.

The application of gas sensors for the measurement of environmental odor was investigated. The test chamber systems were consist of three parts, as it were, sample injection, odor sensing and data process parts. Four type of sensors were tested with regard to sensor performance like baseline stability, sensitivity and reproducibility to H₂S, CH₃SH, NH₃, and (CH₃)₃N gases. As the results, two kinds of sensors were content with the circuit conditions used in this study. In addition, the influence of relative humidity to the selected two types sensors was tested. The [mal sensor, which was appeared to be the most stable sensor against relative humidity, was selected, and applied practically to measure the real odor from the manure odor source.

In this study, the paint, which has very close relationship to the of indoor air quality, was examined for the air pollution leveling test, and using the various passive sampler, the test was evaluated on the regard of TWA(Time Weighted Average). This study is to examine how the air pollution levels differ between the regular paint that is used for public and the new developed environment friendly paint. The consecutive experiments were performed in the small chamber test to investigate the VOCs and formaldehyde, ammonia emissions and characteristics from paint which are commonly used as the complete material of building. In conclustion, the natural paint showed the highest emission of VOCs among the selected paints, and water paint showed the highest contents of ammonia. Formaldehyde showed N.D(Not Detected) in most of tests and found a small amount in vinyl paint however, it was not as bad as to fail the certify level of building materials. It is recommended to constantly develop the chamber system and it will be very much possible to be used for the estimation of indoor air pollutants from the various paints and other complete materials.