고속도로 톨게이트 부스의 공기 중 분진 및 침착 분진 특성

남미란 ( Mi Ran Nam ),정종현 ( Jong-hyoen Jung ),피영규 ( Young Gyu Phee1* ) 한국산업보건학회 (구 한국산업위생학회) 2020 한국산업보건학회지 Vol.30 No.1

Objectives: This study was performed to evaluate the total dust, size-selective dust, and heavy metal concentrations generated inside and outside toll booths on an expressway and to identify the source through analysis of the components of the deposited dust. Methods: A total of 32 samples were collected from eight expressway toll booths. Each total dust sample was collected using a 37 mm PVC filter attached to a personal air sampler. Heavy metal samples were collected according to NIOSH method 7300. The size-selective dust concentrations were identified using a DustMate, and deposited dust was analyzed by WD-XRF and UHR-FE-SEM. Results: The geometric mean concentrations of the total dust inside and outside the toll booths were 337.5 ㎍/㎥ and 342.7 ㎍/㎥, respectively. The overall concentrations of TSP, PM₁₀, PM_2.5, and PM₁ were higher on the outside of the toll booths, as the particle size of dust was larger, and higher in the underground passage as the dust size was smaller. The real-time analysis of the dust concentrations of TSP, PM₁₀, PM_2.5, and PM₁ revealed to be higher at morning and evening times than other times because of heavy traffic. The element components of deposited dust in the toll booth were related to natural sources rather than artificial sources. Among the chemical components in the deposited dust analyzed by WD-XRF, SiO₂ was the highest. For the elements analyzed by UHR-FE-SEM, C was the highest, followed by O, and Si. Conclusions: In order to reduce the dust concentrations around toll booths on an expressway, it is necessary to periodically clean surrounding areas such as underground passages, and it is also necessary to remove deposited dust inside the toll booth from time to time.

고속도로 톨게이트 부스 내 공기 중 PM₁₀의 노출평가

남미란 ( Mi Ran Nam ),피영규 ( Young Gyu Phee ) 한국산업보건학회 (구 한국산업위생학회) 2018 한국산업보건학회지 Vol.28 No.2

Objectives: This study was conducted in order to evaluate PM10 concentrations at eight highway tollgate booths from July to September 2017. Methods: A total of 16 samples were collected from eight toll booths. Each PM10 sample was collected using a 37 mm PTFE filter attached to a Personal Environment Monitor. Results: The geometric mean concentrations of PM10 in the toll booths was 83.51 ㎍/㎥. The mean PM10 concentrations measured on freight roadways were much higher than those of measured on general roadways(102.46 ㎍/㎥ and 68.05 ㎍/㎥, respectively). PM10 was revealed to be higher in the morning(105.59 ㎍/㎥) than at dawn or in the afternoon(71.26 ㎍/㎥ and 61.22 ㎍/㎥, respectively). The mean PM10 concentration in toll booths ventilated through an air conditioner was higher than that for those using a window or no ventilation. The rate of exceeding the Ministry of Environment Maintenance Limit(200 ㎍/㎥) was 6.25%, and the rate of exceeding the Ministry of Labor Recommended Limit(150 ㎍/㎥) was 12.5%. Conclusions: In order to protect the health of toll booth workers exposed to airborne dust, it is necessary to check the exposure level from indoor air quality on a regular basis and to manage it appropriately according to the results.

사업장 내 사무실의 PM2.5 노출 평가

남미란 ( Mi Ran Nam ),정종현 ( Jong Hyon Jung ),피영규 ( Young Gyu Phee ) 한국산업위생학회 2013 한국산업보건학회지 Vol.23 No.4

Objectives: This study was conducted in order to evaluate PM2.5 concentrations at 20 offices connected to the manufacturing industry from the beginning of September to the end of November 2012. Methods: A total of 20 samples were collected from 20 office buildings. Each PM2.5 sample was collected by a 37 mm PTFE filter attached to a Personal Environment Monitor. Results: The geometric mean concentrations of PM2.5 in the offices was 23.47 ㎍/㎥, and the mean PM2.5 concentrations measured in smoking offices were much higher than those of measured in non-smoking offices(24.83 ㎍/㎥and 21.55 ㎍/㎥, respectively). PM2.5 was revealed to be higher in small offices(39.52 ㎍/㎥) than in medium or large offices(22.69 ㎍/㎥and 11.04 ㎍/㎥, respectively). The mean PM2.5 concentration of offices located on the 1st floor was higher than that of those on the 2nd floor, and those of offices located in the workplace were higher than those out of the workplace. The multiple regression model showed that concentration of PM2.5 was positively associated with the method of ventilation. Conclusions: Smoking, ventilation method, location, and inflow of outdoor particulate matter are the most important factors for office PM2.5 concentrations.

광물성분진 노출사업장의 공기 중 석영의 농도 비교

정경선,배혜정,남미란,정종현,피영규,Jeong, Gyeong Seon,Bae, Hye Jeong,Nam, Mi Ran,Jung, Jong-Hyoen,Phee, Young Gyu 한국산업보건학회 2017 한국산업보건학회지 Vol.27 No.3

Objectives: This study was conducted toestimate quartz concentrations and contents in the airborne respirable dust from various industries. Methods: A total of 818 samples were collected from 174 industries. Respirable dust samples were collected using a cyclone equipped with a 37 mm, $5{\mu}m$ pore size PVC filter. The quartz concentrations were identified using the intensity of the absorption peak of quartz at $799cm^{-1}$ by Fourie Transformed Infrared Spectroscopy(FTIR). Results: The respective geometric means for quartz concentrations in the respirable dust were 0.0050, 0.0049, 0.0025, and $0.0019mg/m^3$ in foundries, ceramics, construction, and cement/stone. The geometric mean of quartz contents analyzed by FTIR were respectively 3.43, 1.99, 1.04, and 0.82% for ceramics, foundries, cement/stone, and construction. The rate of exceeding the Korean Occupational Exposure Limit($0.05mg/m^3$) was 2.03%, but rate of exceeding the American Conference of Governmental Industrial Hygienist(ACGIH) Threshold Limit Value($0.025mg/m^3$) was 7.12%. Conclusions: Given that foundries had a higher quartz concentration, there is a need to reduce respirable dust, such as through wet operation. In order to protect the health of workers exposed to mineral dust, it is necessary to actively consider strengthening the Korean Occupational Exposure Limit.

주물사업장 내 공기중 화학적 유해인자 노출 평가

배혜정 ( Hye Jeong Bae ),남미란 ( Mi Ran Nam ),이상만 ( Sang Man Lee ),정유진 ( Yu Jin Jung ),손병현 ( Byung Hyun Shon ),피영규 ( Young Gyu Phee ),정종현 ( Jong Hyeon Jung ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.5

This study was performed to identify the state of the exposure and characteristics of pollutants by each process at 4 casting sites located in Gyeongsang-do from April to November 2013. The concentrations of methanol, crystallized silica glass, formaldehyde and phenol were analyzed by different process - casting process, molding process, core process, and shakeout & finishing process. The highest concentration of methanol was found in casting and molding process, whereas the highest concentration of crystalline quartz(Silica) was observed in core process. The most oxidized steel dusts and the highest concentration of fume were found in shakeout & finishing process. As a result of this study, those labors working at the casting site were found to be constantly exposed to various forms of hazardous chemicals; therefore, it is considered that this is the time to manage and plan how to reduce them. In addition, it is required to thoroughly manage the local exhauster, and improve the process and working environment to reduce various forms of hazardous chemicals.

설악산 신갈나무(Quercus mongolica Fish.)林의 再生産에 關한 硏究

金聖德,南美蘭 忠南大學校 環境問題硏究所 1991 環境硏究 Vol.9 No.-

Regeneration process of climax mongolian oak forest in Bukam-ryeoung area, Mt, Seolag, Gangwon-do Prefecture, was studied in relation to its structure. The dominant trees of the stands came up beyond 10m in height. The upper-tree layer was heighly dominated by oaks, and they distributed horizontally in random. Oak trees of the middle layer and the lower layer were few in number and small in basal area, and tended to be dirtributed contagiously. In the trees of the upper layer, the distribution of the age tended to bo two modal type which had the mode of 70 and 230 year in plot. In the horizontal distribution of these trees, some of the even-aged cluster which were constituted of several trees, were found. The rate of the stem diameter increment during first 25 years of the oaks in upper layer were heigher than those of the same species in the middle layer. These results seem to show that after the forest canopy had been broken out, the seeding which were established in dense there grow with the decreasing density. and some of these, of which distribution became in random, would consitutitute the canopy.

초등학교 학습부진 학생을 위한 ‘맞춤형 학업향상 관리 프로그램’ 적용 효과

이대식,남미란,문주연,류경우 이화여자대학교 사범대학 교육과학연구소 2012 교육과학연구 Vol.43 No.2

이 연구의 목적은 학습부진 유형을 진단하고, 학습부진 학생들이 가진 여러 가지 특성을 고려하여 ‘맞춤형 학업향상 관리 프로그램’을 구안하고 적용하여 그 효과를 제시하는 데 있었다. ‘맞춤형 학업향상 관리 프로그램’의 주요 요소는 학습부진 유형과 학습자 특성 파악, 학습부진 영역의 구체적인 진단, 전문가 컨설팅을 동반한 지속적이고 효과적인 교수-학습 프로그램 투입, 학습자의 심리 및 정서 측면의 지원 요구 고려 등이었다. ‘맞춤형 학업향상 관리 프로그램’을 두 곳의 초등학교 4, 5학년 학습부진학생 26명에게 약 5개월 동안 투입한 후, 이들 학생들의 수학 성적 향상 정도를 분석하고 프로그램에 대한 만족도를 조사하였다. 그 결과, 연구에 참여한 학습부진학생들의 수학성적이 유의하게 향상되었고, 프로그램에 대한 만족도도 높았다. The purpose of this study was to examine the effects of an adaptive management program for increasing academic achievement in math and program satisfaction levels of low achieving students. The program was developed based on a careful analysis of students’ characteristics and the causes of low achievement, specific diagnosis of the areas and degrees of low achievement, an effective and on-going teaching-learning program, and the consideration of students’ emotional and psychological risk factors. The program was implemented for one semester among 26 low-achieving 4th and 5th graders from two elementary schools. As a result, participants’ math achievement improved significantly. Also, the students were satisfied with the comprehensive and systematic intervention program.