간행물
실내환경 및 냄새 학회지 KCI 등재 Journal of Odor and Indoor Environment
- 발행기관 한국냄새환경학회
- 자료유형 학술지
- 간기 계간
- ISSN 2288-9167 (Print)2288-923X (Online)
- 수록기간 2014 ~ 2024
- 주제분류 공학 > 환경공학 공학 분류의 다른 간행물
- 십진분류KDC 539DDC 628
권호리스트/논문검색
제14권 제2호 (2015년 6월) 8건
1.
2015.06
구독 인증기관 무료, 개인회원 유료
The purpose of this study is to confirm the removal effect of odorous gas through the multi process. The combination of Scrubber, UV and Adsorption was analyzed using the odor gas of reservoir. Analysis was carried out for six times in total and collection was made once per each process. Sampling was performed in the afternoon during August (1:00 pm~4:00 pm). Multi process has been designed to facilitates the accessories exchange. The advantage is that it facilitates the replacement of the activated carbon and it is convenient to change the type of chemical according to the type of pollution materials. As a result, for odor gas removal efficiency, ammonia 91.8%, trimethylamine 72.0%, hydrogen sulfide 99.9%, methyl mercaptan 99.9% were removed respectively. Removal efficiency of the process is the scrubber (alkali), activated carbon adsorption, scrubber (acid) and UV procedure from the highest order. Further studies on the operating method and efficiency of multi process by the change of wind speed and chemical are recommended.
4,000원
2.
2015.06
구독 인증기관 무료, 개인회원 유료
The efficiency of using 7 indoor plants, which were Chrysalidocarpus lutescens, Ficus robusta, Sansevienria trifasciata, Rhapis excelsa, Scindapusus aureus, Anthurium andraeanum and Pachira aquatica, for B·T·E (Benzene, Toluene, Ethylbenzene) removal were assessed at 1200 Lux light intensity in airtight chambers (1.27 m3). Rhapis excelsa, Chrysalidocarpus lutescens and Ficus robusta were among the most effective plants, completely removing for B·T·E within 38 hours, wherease Scindapusus aureus and Sansevienria trifasciata were the lowest in terms of removal efficiency. But when the removal efficiency was measured per unit leaf area (μg·m−3·−2), it was found that Scindapusus aureus, Anthurium andraeanum and Sansevienria trifasciata removed higher amount than Rhapis excelsa, Chrysalidocarpus lutescens and Ficus robusta. Plants with wide leaves and a big leaf area including Rhapis excelsa and Chrysalidocarpus lutescens showed higher removal efficiencies of B·T·E than those with smaller leaves such as Scindapusus aureus. Among the plants tested over 120 hours, the species that emitted the highest levels of CO2, involved with photosynthesis and respiration in plants, Pachira aquatica (11,560 ppm) was emitting 10 times more CO2 than Scindapusus aureus (1,260 ppm).
4,000원
3.
2015.06
구독 인증기관 무료, 개인회원 유료
Odor problems in urban areas have become a common cause of public complaints. In order to gain a better understanding of odor problems, we investigated the emission characteristics of odorants originating from manholes (n=22) and stormwater catch basins (n=48) (SCBs) around Wangsimni station in Seoul. To this end, concentrations of H2S and NH3 were measured after arbitrarily dividing the whole study area into five different districts. Our measurements were made to allow comparisons between three different criteria: (1) manholes vs. SCBs, (2) temporal variation between morning vs. afternoon, and (3) water content in the sewer system. The average concentration of H2S in manholes and SCB were 2.39 ppm and 0.81 ppm, respectively. In contrast, their NH3 counterparts were 1.86 ppm and 1.02 ppm, respectively. According to the contouring method made to identify spatial distribution characteristics, of odorants a relatively lowland site D was expected to work as a significant emission source in light of the transportation patterns of a sewer system. Moreover, higher concentrations of odorants were prevalent in the afternoon (as the prime time for commercial activities) relative to before noon. If concentration data are converted into odor intensity, H2S was the predominant component exerting controls on the odor pollution in these underground environments.
4,000원
4.
2015.06
구독 인증기관 무료, 개인회원 유료
This study was a time activity pattern assessment focused on transportation in subpopulation groups using the ‘Time-Use Survey’ conducted by the National Statistical Office in Korea in 2009. The time activity patterns of transportation on weekdays were analyzed, looking at average travel time in Seoul, Gyeonggido and the whole country. Various subpopulation groups were classified such as students, the elderly, workers and housewives. The population of Gyeonggido had a higher average transportation time than that of Seoul. Workers showed the highest weekly average travel, while the students group showed the lowest tendency. The times spent in walking, bus, subway and taxi were the highest in areas other than Gyeonggido, where the use of private vehicles such as car was higher. Therefore, exposure to hazardous air pollutants may vary depending on the transportation method and time spent. This results indicate that time activity pattern assessment on transportation may be an important element of exposure assessment.
4,000원
5.
2015.06
구독 인증기관 무료, 개인회원 유료
It is well known that smoking generates harmful air pollutants. With smoking in buildings as well as in the streets prohibited, the need for smoking rooms has emerged. In this study, particle and CO contamination in a 63.6 m3 smoking room was experimentally investigated using Korean tobacco. Tobacco smoking was artificially simulated using a smoking machine. The number and size distribution of particles ranging from 10-420 nm and 0.25-32 μm were measured using a Nanoscan (TSI model 3910) and a portable aerosol spectrometer (Grimm model 1.109), respectively. CO concentration was also monitored using an IAQ monitor (Graywolf IAQ-Xtra 610). Four tobaccos were simultaneously smoked in each experiment, and the experiment was repeated four times. Maximum CO concentrations of 7-10 ppm were observed and high concentrations of particles (176,000-1,115,000 particles/cm3 for 10-420 nm, 3,700-5,200 particles/cm3 for 0.25-32 μm) were also monitored. The dominant size of tobacco particles was about 100 nm in diameter.
4,000원
6.
2015.06
구독 인증기관 무료, 개인회원 유료
Ventilation devices and room air cleaners can be used to remove indoor contaminants from indoor air. Generally, room air cleaners are rated according to clean air delivery rate (CADR). However, a similar metric for ventilation has not been used to be compared with CADR of room air cleaner. The CADRs and cost-effectiveness metrics (CADR/kw) of ventilation devices and room air cleaners were newly defined and theoretically compared for a child care center. The results indicate that the CADRs of room air cleaner were greater than that of ventilation. A higher collection efficiency for the particles guaranteed a higher CADR for ventilation. Ventilation filter had a performance that exceeds MERV11 should be used to effectively control the indoor particle concentration. The stand alone type air cleaner was found to have the best performance in the cost-effectiveness. The reason for this is that the effective air cleaning ratio of the stand alone type air cleaner is higher than that of the others and the power consumption of the stand alone type air cleaner is lowest.
4,000원
7.
2015.06
구독 인증기관 무료, 개인회원 유료
This study provides a comparison and analysis of the predicted damages related to hazardous chemical substances used in “A” solar cell manufacturing process. In order to predict potential damages, different accident scenarios were established using the ALOHA model and the KOSHA guideline. This study evaluates chemical spills and leaks from cylinder and pipeline. Maximum distance of chemical movement, based on an initial concentration of 150 ppm, was estimated as up to 258 m in summer and 251 m in winter. The impacts of the leakage of chemicals such as ammonia, were dependent on the initial concentration of the chemical leaked, the atmospheric stability and temperature, and the wind speed. All of those however, were affected by air humidity.
4,600원
8.
2015.06
구독 인증기관 무료, 개인회원 유료
This paper presents the performance of a CFD model for the near field dispersion of odor from rooftop emissions. The FLUENT Shear-Stress Transport (SST hereinafter) k-ω turbulence model was used to simulate odor dispersion from a rooftop odor vent. The results were compared with a wind tunnel experiment and the calculated results of ASHRAE 2003 and 2007. The FLUENT SST k-ω turbulence model provided good results for making reasonable predictions about the building rooftop surface normalized dilution. It was found that increasing the vent height (from 1 m to 7 m) reduces rooftop surface normalized dilution. ASHRAE 2003 and ASHRAE 2007 performance measures are generally not as good as FLUENT SST k-ω turbulence model performance measures, with larger MG (the geometric mean bias, VG (the geometric variance), NMSE (the normalized mean square error), FB (Fractional bias), and smaller FAC2 (the fraction of predictions within a factor of two of observations).
4,000원
