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민경우,이경석,박옥현,윤관주,김도술,박세일,정원삼,이대행,조영관,Min, Kyoung-Woo,Lee, Kyoung-Soek,Park, Ok-Hyun,Yoon, Kwan-Ju,Kim, Do-Sool,Park, Se-Il,Jeung, Won-Sam,Lee, Dae-Hang,Cho, Young-Gwan 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.3
Objectives: This study aimed to survey the characteristics of air quality and meteorological conditions in a greenway park. Methods: We measured meteorological and health related factors, including noise, particulate matter ($PM_{10}$) and selected gaseous air pollutants at three locations in a greenway park and on a general roadside as comparison. The measurements were repeated four times from April to October 2014. Results: The average air temperature in the greenway park was $20.7^{\circ}C$ which was $1-2^{\circ}C$ lower than on the general roadside. The average $PM_{10}$ concentration in the greenway park was $85.0{\mu}g/m^3$, a level 2-3 times lower than that at the roadside. The noise level at the greenway site was 4.4 dB(A)- 23.0 dB(A) lower than at the roadside. The average CO, $CO_2$, $SO_2$ and NOx concentrations in the greenway park were lower than at the roadside. The average phytoncide and anions concentrations in the greenway park were higher than at the roadside. Conclusions: The urban forest of the greenway park may have some impact on air quality and meteorological conditions.
하수처리 방류수 BOD5 중 NOD 기여율에 관한 연구
민경우 ( Kyoung Woo Min ),정원삼 ( Won Sam Jeong ),이대행 ( Dae Haeng Lee ),서광엽 ( Gwang Yeob Seo ),김승호 ( Seung Ho Kim ),백계진 ( Ke Jin Paik ),문용운 ( Young Woon Mun ) 한국환경분석학회 2011 환경분석과 독성보건 Vol.14 No.1
In this study, BOD5, CBOD, NOD, T-N etc. were analyzed for influent and effluent samples collected from two sewage treatment plants(STPs) and for river water samples. The sampling took place from March to October, 2010. The NOD contribution to BOD5 varied with the sampling site, NOD accounts for 10~15% of BOD5 for STP influent, 45~56% for STP effluent, 3~26% for the stream water, respectively. The contribution of NOD to BOD5 also varied with water temperature, the contribution ratio was about 20% during the summer (July-September), however NOD portion of BOD5 was 50%~60% during the spring and the fall. In addition, the experimental NOD values for STP effluent were compared to theoretical NOD ones. The ratio of theoretical value to experimental one was 0.89~1.21 implying that the experimental value would be very close to the theoretical one. BOD5 and various types of nitrogen were analyzed for 10 days. Some samples showed complete nitrification and some did not. One sample showed nitrification immediately after 5 days of incubation.
서광엽,김승호,이경석,민경우,서희정,강영주,백계진,문용운,신대윤,Seo, Gwang-Yeob,Kim, Seung-Ho,Lee, Kyoung-Seok,Min, Kyoung-Woo,Seo, Hee-Jeong,Kang, Yeong-Ju,Paik, Ke-Jin,Moon, Young-Woon,Shin, Dae-Yewn 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.2
In this study, ambient particulate matter ($PM_{2.5}$ and $PM_{10}$) levels were measured and their chemical and physical properties were characterized. Two sites in Gwangju were sampled once a month from December 2008 to November 2009. The annual mean concentrations of $PM_{2.5}$ and $PM_{10}$ were $26.9\;{\mu}g/m^3$ and $46.3\;{\mu}g/m^3$, respectively, in Nongseongdong and $26.1\;{\mu}g/m^3$ and $44.8\;{\mu}g/m^3$, respectively, in Duam-dong. $PM_{2.5}$ levels were 1.8 times higher than the USA Environmental Protection Agency (EPA) national ambient air quality standard for $PM_{2.5}$ ($15\;{\mu}g/m^3$). The average $PM_{2.5}/PM_{10}$ ratio of 0.58 suggested that $PM_{2.5}$ is a significant component of the ambient particle pollution. The order of concentration of metallic elements in $PM_{2.5}$ and $PM_{10}$ was Si > Al > Fe > Zn > Pb > Cu > Mn. Cd was not detected. The earth crustal enrichment factors for Cr, Cu, Pb and Zn in $PM_{2.5}$ were higher than those in $PM_{10}$. When the earth crustal enrichment factors for Cr, Cu, Pb and Zn were higher than 10, this suggested influence from anthropogenic sources. The soil contribution ratios for $PM_{2.5}$ and $PM_{10}$ were 11.3% and 16.4%, respectively, and were higher in the fall and winter. Anions (${SO_4}^{-2}$, ${NO_3}^-$, and $Cl^-$) comprise 28.7% of $PM_{2.5}$ and 21.4% of $PM_{10}$. The correlation coefficient of Zn-Fe, Mn-Cu, Fe-Cu and Fe-Mn in $PM_{2.5}$ was high in the sampling sites, and metallic elements were primarily from anthropogenic sources such as fuel combustion and vehicle emissions.
네일샵 종사자의 휘발성유기화합물 노출실태와 건강에 미치는 영향
김난희 ( Nan-hee Kim ),민경우 ( Kyoung-woo Min ),조광운 ( Gwang-woon Cho ),서동주 ( Dong-ju Seo ),임경훈 ( Kyeong-hun Im ),정원삼 ( Won-sam Jeung ),조영관 ( Young-gwan Cho ),양진석 ( Jin-seok Yang ) 한국산업보건학회 (구 한국산업위생학회) 2017 한국산업보건학회지 Vol.27 No.1
Objectives: The objective of this study is to evaluate the exposure of VOCs and effects of the chemicals on the nail technicians whose works in a nail shop. Methods: For four month from May to August in 2016, we measured twenty-two kinds of VOCs in ten nail shops and carried out health examinations on thirty-four workers in there. Results: The TVOC concentration in indoor air of nail shops is 0.487 ㎎/㎥ at a minimum and 33.236 ㎎/㎥ at a maximum where it consists of 70.5% of Ketones, 25.4% of Alcohols, 2.6% of Esters, 0.8% of Aldehydes and 0.7% of Aromatics. The VOCs concentration during nail art works shows an increase in average ratio 1.8 compared to the concentration of indoor air quality and also the concentration of Isopropanol rose with 3.2 of the highest ratio. The results of Spearman correlation between TVOC concentration in indoor air and environmental factor was like that has significance level of correlation(ρ<0.05, r=0.682) in case of number of customers per day, but the other factors were not meaningful in correlation. Correlation between VOCs and medical check-up items was like that has positive significance level(ρ<0.01, r=0.638) between isopropanol and GPT, but the others have not meaningful. The exposure level of VOCs was not exceed the criteria exposure level 1 of working environment measuring method which announced by labor ministry in all ten nail shop indoor air quality. Conclusions: In this study although it was not significant correlation between harmful substances and medical check-up items in the nail shop indoor air quality, it is necessary to do more ventilation and to install exhaust facilities because of existing high VOCs concentration in the nail shop indoor air.
소규모 세탁소의 휘발성유기화합물 발생 특성과 종사자의 건강에 미치는 영향
박옥현 ( Ok-hyun Park ),이경석 ( Kyoung-seok Lee ),민경우 ( Kyoung-woo Min ),조광운 ( Gwang-woon Cho ),윤관주 ( Kwan-ju Yoon ),정원삼 ( Won-sam Jeong ),조영관 ( Young-gwan Cho ),김은선 ( Eun-sun Kim ),양진석 ( Jin-seok Yang ) 한국산업보건학회 (구 한국산업위생학회) 2016 한국산업보건학회지 Vol.26 No.2
Objectives: The objective of this study was to evaluate the generating characteristics of VOCs and the exposure effect to chemicals among laundry workers and to identify the current status of occupational safety and health through health check-ups. Methods: During the six-month period from April to September 2015, this study quantitatively measured seven VOCs in ten laundries and carried out health examinations on 35 workers. Results: Comparing the monitoring results for the ten laundries, they were classified into three groups by ventilation system, dry-cleaning and size of shop. The average concentration of toluene, chlorobenzene, xylene, ethylbenzene, benzene, styrene and TCE were 23.9, 15.6, 5.5, 2.8, 0.9, 0.3 and 1.3 ㎍/m3, respectively. During dry-cleaning, VOC concentrations were 1.3-8.9 times higher than usual. On the other hand, at night the concentrations of toluene, chlorobenzene, xylene, ethylbenzene, benzene, styrene and TCE were 64.3, 41.5, 12.2, 6.3, 1.1, 1.2 and 6.6 ㎍/m3, respectively. The health checkup results for the 35 workers showed that 13 workers were diagnosed as normal, while 22 workers were diagnosed as requiring continuous monitoring or re-checkup of liver and hematogenous functions. Conclusions: Although the results of exposure evaluation to VOCs did not exceed reference value and items had a low correlation with health checkup items, it is necessary to improve indoor air quality due to VOC volatilization from clothes
이세행 ( Se Haeng Lee ),정숙경 ( Suk Kyung Jeong ),이경석 ( Kyoung Soek Lee ),민경우 ( Kyong Woo Min ),김현승 ( Hyun Seung Kim ),김도술 ( Do Sool Kim ),강영주 ( Yeong Ju Kang ),배석진 ( Seok Jin Bae ) 한국환경분석학회 2013 환경분석과 독성보건 Vol.16 No.2
The aim of this study is to understand the characteristics of indoor air pollutants and provide information about the present Indoor Air Quality(IAQ) in 104 public facilities from January 2011 to December 2012. The measured air pollutants are PM10, HCHO(formaldehyde), CO, CO2, and total airborne bacteria(TAB). And the effects of environmental factors such as temperature, humidity and construction characteristics were analyzed in relation to the measured concentrations. The results of this study showed that the mean concentration of PM10, CO2, HCHO, CO, and TAB were 55.3 /, 558.6 ppm, 31.0 /, 1.2 ppm, and 561.3 CFU/, respectively. The correlation analysis showed that CO2 and HCHO (r=0.497, p<0.01), CO2 and TAB (r=0.468, p<0.01), and PM10 and CO (r=0.342, p<0.01) were significant. The result of regression analysis was found that the influence factors associated with the concentration of PM10, HCHO, and TAB were the year of building construction, the temperature and the humidity.