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Mass Balance 모델을 이용한 신축공동주택의 휘발성유기화합물 발생량 추정
심상효(Sang hyo Sim),김윤신(Yoon Shin Kim),김화선(Hwa-Sun Kim),이철민(Cheol Min Lee),이송권(Young-Man Roh),노영만(Song kwon Lee) 한국실내환경학회 2006 한국실내환경학회지 Vol.3 No.3
This study was performed to estimate the emission rate of volatile organic compounds (VOCs) and to evaluate the risk level affected by indoor air pollutants (IAPs) in 27 new apartments (prior to residence) in Seoul City from December 2004 to March 2005. The indoor air pollutants investigated in this study include formaldehyde, several aromatic VOCs (benzene, toluene, styrene, xylene, and ethylbenzene). All measurements were made based on the standard method of Ministry of Environment in Korea. The indoor concentration levels for benzene, xylene, toluene, ethylbenzene, styrene, and formaldehyde have significant increase trend 5 hours after closing windows and doors. Levels of air pollutants did not exhibit significant difference between living rooms and bedrooms. The air exchange rates by the concentration decay method using SF6 were 0.37 for low floor, 0.32 for middle floor, and 0.75 for high floor. The emission rate showed the highest level in the middle floor and second one in the low floor, when estimated by the IAQ model for benzene, toluene, ethylbenzene, xylene, styrene, and formaldehyde. Considering the above result, it is suggested that the estimation of emission rate be considered when the new apartment is designed and constructed with respect to construction materials to emit low VOCs. Moreover, the related regulation should be established for IAQ management.
신축공동주택의 실내공기질 특성 및 평가 -휘발성 유기화합물 및 포름알데히드 중심으로-
심상효,김윤신,Sim, Sang-Hyo,Kim, Yoon-Shin 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.4
Indoor air quality is the dominant contributor to total personal exposure because most people spend a majority of their time indoors. Especially exposure to indoor air can potentially pose a greater threat than exposure to ambient air when indoor environments have sources of contaminants. In this study, volatile organic compounds (VOCs) and formaldehyde (HCHO) within newly constructed apartment have been determined in 27 houses of apartment in Seoul from December 2004 to March 2005. The measured indoor air pollutants were HCHO, volatile organic compounds including benzene, toluene, styrene, xylene, ethylbenzene and sampled on the standard method of Ministry of Environment in Korea. The indoor levels for benzene, xylene, toluene, ethylbenzene, styrene, and HCHO have significant increase trend after 5 hours closing of windows and doors. Levels of measured air pollutants concentrations between living rooms and bedrooms have not shown significant difference. Spearman correlation coefficient among the measured air pollutants ranged from 0.303 to 0.946, indicating similar source in building materials.
자동차 정비업체 도장공정의 작업환경 및 근로자 노출 실태에 관한 연구
심상효,정춘화,임진숙,이형구,김윤신,Sim, Sang-Hyo,Jeoung, Chun-Hwa,Lim, Jin-Suk,Lee, Hyung-Gu,Kim, Yoon-Shin 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.3
The purpose of this paper is to evaluate 1) blood lead levels of workers at auto repair shops as Biological Exposure Indices (BEI) of toxic substances such as lead and toluene that are produced during automotive painting process, 2) the differences depending on personal characteristics of workers who have been exposed to toluene by using urine hippuric acid concentration as a marker and 3) the correlation between the concentration of hazardous chemicals in each workplace and the BEL. All subjects were male with a mean age of 36.2 years. In terms of age, most were in the 30 to 40 age group (13 persons, 48.1%). In relation to the length of work experience, the highest proportion had experience of 10 years of less (18 persons, 66.7%). Twenty three workers were cigarette smokers (85.2%) while 4 (14.8%) were non-smokers. In addition, more than 80% of the workers drank alcohol. Dust concentration and toluene exposure during automotive painting showed no significant difference with age, length of work experience, smoking and drinking while a significant difference (p<0.05) has been detected between lead concentration and smoking. The geometric mean of dust concentration, lead concentration and toluene concentration were $0.38mg/m^3,\;0.0021mg/m^3$ and 1.08ppm respectively. In addition, the geometric mean of blood lead levels and urine hippuric acid concentration were $1.70{\mu}g/dl$ and 0.25g/g respectively, which were lower than the standard levels suggested by the Ministry of Labor. To determine the influential factors on blood lead and urine hippuric acid concentrations, a correlation analysis has been conducted with variables of air, lead and toluene concentrations, age, length of work experience and amount of cigarette smoking. According to the analysis, a relatively high correlation (p<0.01) has been observed between air lead concentration and biological sample concentration.
심상효,정희태,송기민,김윤신,강용선,Sim, Sang-Hyo,Chung, Hee-Tae,Song, Ki-Min,Kim, Yoon-Shin,Kang, Yong-Seon 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.4
This paper aims to provide basic data for work environment control, prevention of worker exposure to asbestos and improvement of air quality to protect workers ‘health after measuring the level of airborne asbestos and workers' exposure in a shipbuilding repair businesses. For this study, a total of 27 samples were collected from 27 workers who had been exposed to asbestos during engine, piping, boiler and other manufacturing processes in 'A' Shipbuilding Repair Company in Gyeongnam. This research was conducted from Oct. 1 to 30, 2007 and had the following results: The target group (27 workers) consisted of all men with an average age of 35.9 years and 6.6 years of work on average. Among them, fifteen 15 (55.6%) were smokers. In terms of their duties at work, there were 12 plumbing repair engineers (44.4%), 8 boiler repair engineers (29.6%) and 7 engine engineers (25.9%). The geometric mean concentration of airborne asbestos was 0.004 f/cc. A total of 4 samples exceeded the exposure limit. In particular, three exceeded the legal limit by more than double, which means that some workers have been highly exposed to asbestos. In terms of the concentration of asbestos fibres by work process, plumbing repair was the highest (0.0071 f/cc($0.001{\sim}0.57\;f/cc$)) while boiler was the lowest (0.0015 f/cc($0.001{\sim}0.007\;f/cc$)). Based on this study, proper action needs to be taken as soon as possible to protect workers from the threat of asbestos.
조선소 용접작업자들의 총용접흄과 호흡성분진농도 비교연구
강용선,심상효,이송권,빈성오,최은석,Kang, Yong-Seon,Sim, Sang-Hyo,Lee, Song-Kwon,Bin, Sung-Oh,Choi, Eun-Seok 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.4
The purpose of this study is to assess the accurate state of the following: total welding fumes versus welding fumes in the air, respirable particulate mass, and exposure of dockyard welders to heavy metals. In addition, this study provides basic data for proposing improvements to create efficient and appropriate welding environments and to prevent occupational diseases. The subjects of this study were 94 laborers who worked at the block construction sites of large-scale dockyards located in Gyeongnam Province from March 2005 to June 2005. In order to collect samples on total welding fumes in the air and respirable particulate mass from the welders, Methods 0500 and 0600, established by the National Institute for Occupational Safety and Health (NIOSH), were used. The metals within the welding fumes were also analyzed using Inductively Coupled Plasma (ICP) under Method 7300 from NIOSH. The results of this research are summarized below. The geometric mean concentration of total welding fumes and that of respirable particulate mass were $4.11\;mg/m^3\;and\;3.53\;mg/m^3$, respectively. As a result of comparing the two measurement methods, there were significant differences (p<0.05) between the two groups for Ca, Cu, Cr, and Ni; however, there were no differences in Fe, Mg, Zn, Mg, Pb, and Cd. As a result of the analysis, the correlation between Mn and the concentration of heavy metals in the total welding fumes and respirable particulate mass was found to be -0.29, a significant negative correlation. The correlation between other heavy metals, however, was low. Finally, in the same total welding fumes, the correlation of Fe and Mg was high.
전문대학 보건계열 대학생의 가치관과 자기효능감에 따른 전공만족도
정신호,김현희,심상효,Chung, Sin Ho,Kim, Hyunhee,Sim, Sang Hyo 한국학교ㆍ지역보건교육학회 2017 한국학교지역보건교육학회지 Vol.18 No.2
Objectives: The purpose of this study was to investigate major satisfaction according to the values and self efficacy of students majoring in health science. Methods: Among the 170 respondents, 25.3% were male and 74.7% were females. The departments were 28.9% of physical therapy, 20.6% of laboratory science, 23.5% of occupational therapy, 14.1% of nursing, and dental hygiene 12.9%. Results: In the present study major satisfaction was significantly higher when the higher self efficacy and significantly lower when the higher value. Conclusions: These results indicate that it is necessary to provide contents and appropriate guidance that can enhance the values and self efficacy in order to improve major satisfaction of students majoring in health science.
김동일(Dong Il Kim),심상효(Sang Hyo Sim) 한국실내환경학회 2009 한국실내환경학회지 Vol.6 No.3
This paper has attempted to analyze asbestos dismantlement and removal companies' licensing procedure and their work satisfaction and observance of laws and regulations and discover problems for improvement of the current system. In terms of the number of asbestos dismantlement and removal companies by region, Seoul and Gyeonggi (32, 43.2%) were the highest, followed by Jeonnam, Jeonbuk and Jeju (19, 25.7%), Gyeongnam and Gyeongbuk / Chungnam and Chungbuk (8 apiece, 10.8%) and Gangwon (7, 9.5%). In terms of the number of asbestos dismantlement and removal works, it has rapidly increased from 33 cases (1.4%) in 2005 to 598 (25.1%) in 2007 and 1,599 (67.2%) in 2008. In terms of preliminary investigation on asbestos, asbestos-related education and work environment by region, a significant statistical difference has been observed. According to analysis on the asbestos dismantlement and removal companies' satisfaction (in terms of the appropriateness of dismantlement and removal cost), 'unsatisfied (35 companies, 47.3%)' was the highest, followed by 'not bad (20, 27.0%)' and 'satisfied (19, 25.7%),' showing high dissatisfaction on the cost. In terms of the asbestos dismantlement and removal companies' satisfaction at work, Factor 1 accounted for 39.3% while Factor 2 was 16.8%, which showed 56.2% in total.