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도금업체 공정별 근로자의 총크롬 및 6가 크롬 노출 평가
이광용 ( Gwang Yong Yi ),김부욱 ( Boo Wook Kim ),신용철 ( Yong Chul Shin ) 한국산업보건학회 2015 한국산업보건학회지 Vol.25 No.1
Objectives: The objective of this study was to determine characteristics of workers`` exposures to airborne total and hexavalent chromium by job title in electroplating processes. Methods: Total Cr was determined through a modified method based on NIOSH Method 7024. Airborne hexavalent Cr, Cr(VI), was sampled and extracted according to NIOSH Method 7600 and analyzed at 520 nm using an ion chromatograph/visible detector. Results: The geometric mean(GM) of total Cr concentrations from all factories was 11.2 ㎍/m3(GSD=4.9). The GM of Cr(VI) concentrations from all factories was 2.84 ㎍/m (GSD=5.2), and the concentrations among factories were significantly different (p<0.05). The Cr(VI) levels were lower than total Cr levels. Total Cr exposure levels were highest among buffing workers (21.6 ㎍/m3), but Cr(VI) levels were highest among plating workers(4.15 ㎍/m3). The concentrations of Cr(VI) and total Cr from plating tasks was highly correlated(r=0.91). Conclusions: In the electroplating industry, plating workers were mainly exposed to Cr(VI), but others were not. Oxidation-reduction states of Cr and job titles should be considered in the exposure or risk assessments of chrome electroplating factories.
1994년부터 2006년까지 한국 석면취급 사업장의 석면 노출농도
이광용 ( Gwang Yong Yi ),신용철 ( Yong Chul Shin ),윤충식 ( Chung Sik Yoon ),박두용 ( Doo Yong Park ) 한국산업위생학회 2013 한국산업보건학회지 Vol.23 No.2
Objectives: This paper was prepapred to report airborne asbestos fiber concentrations in asbestos textile, brake-lining, commutator, and building materials manufacturing industries, and some other asbestos related industries in Korea from 1994 to 2006. Methods: Airborne asbestos data that have been sampled and analyzed in the above industries during 1994-2006 were collected. These data were reviewed to scrutinize the qualified data based on the records such as sampling and analyzed method and quality control procedures. All asbestos data were generated using the National Institute for Occupational Safety & Health (NIOSH) Method 7400. Results: Average concentration of asbestos fiber was 2.14 fibers/cc(0.02-15.6 fibers/cc) in the asbestos textile industry, 0.26 fibers/cc(0.01-1.01 fibers/cc) in the building-materials industry, 0.15 fibers/cc(0.01-0.93 fibers/cc) in the brake-lining manufacturing industry, and 0.14 fibers/cc(0.03-1.36 fibers/cc) in the commutator producing industry. For these industries, the percentage of samples of which asbestos fiber concentrations above the limit of exposure(0.1 fibers/cc) was 97.6% in the asbestos textile industry, 62.3% in the building-materials industry, 53.5% in the brake-lining manufacturing industry, and 34.3% in the commutator producing industry. Asbestos fiber concentration was below the limit of exposure in the gasket producing, petrochemistry, musical instrument producing industries, and the brake-lining exchange operations. Conclusions: Airborne asbestos fiber level in the asbestos textile, brake-lining producing, commutator and building-material producing industries was above the limit of exposure, but in the gasket producing, petrochemistry, musical instrument producing industries and the brake-lining exchange operations were below the limit of exposure.
인듐 노출 근로자를 위한 생물학적 노출지표로써 혈청 Krebs von den lungen-6의 활용가능성
원용림 ( Yong Lim Won ),이광용 ( Gwang Yong Yi ),이미영 ( Gwang Yong Yi ),김은아 ( Eun A Kim ) 한국산업위생학회 2013 한국산업보건학회지 Vol.23 No.2
Objectives: Although several cases of lung diseases caused by indium have been reported in Japan, the United States and China, South Korea, which is estimated to have been the world’s largest consumer of indium, has not yet established a criteria for the diagnosis of lung diseases caused by indium exposure. In this study, we tried to determine the applicability of the Krebs von den lungen-6, which has been widely recognized for its use with interstitial lung disease in Japan, as a biological exposure index for indium. Methods: Methods: The analysis of indium in serum was conducted by inductively coupled plasma mass spectrometry and the analysis of KL-6 in serum was carried out using enzyme-linked immunosorbent assay kit. Results: The indium levels in serum were distributed from below the detection limit to a peak of 125.78 μg/L, and the values of the KL-6 were distributed from 104.5 U/mL to 2162.2 U/mL. The serum indium and KL-6 showed good correlation (R 2 =0.389,pfortrend=0.000) and smoking did not affect the KL-6. Conclusions: The usefulness of KL-6 as a specific biomarker for interstitial lung disease has been recognized. In addition, it is expected that effective prevention of health problems can be achieved by determining the lung-damage progress at an early stage according to individual susceptibility.
이광용 ( Gwang Yong Yi ),박두용 ( Doo Yong Park ) 한국산업위생학회 2013 한국산업보건학회지 Vol.23 No.3
Objectives: The purpose of this study is to provide current the recent information on indium-related adverse health effects and the Korean indium-related industries. Methods: Peer review papers were searched in environmental, occupational and medical journals with the keyword of ‘Indium’ and ‘ITO’ and reviewed. To determine the indium related industries and indium consumption amounts, references and database were investigated and analyzed. In addition, field walk-through surveys and interviews were conducted in order to collect field data and to ascertain the field situation for the processes and industries. Results: A total of 10 cases of indium lung diseases have been reported in series since the first case reported in 2001. Seven cases were found in Japan, two cases in the United States, and one in China. No indium lung case has been reported yet in Korea, but it is believed that there are high potential risks among workers in indium-related industries. There are four categories in indiumrelated- industry; indium production and smelting, manufacturing of indium products such as ITO target, the production of thin films of flat panel display, and indium recovery industry. We found that all these types of industries are operating in Korea. Therefore, it is necessary for industrial hygienists to understand the processes and industries related to indium as well as the adverse health effects of indium. Conclusions: It was found that all four categories of indium-related industry from the indium production to recovery industry are active in Korea. However, the adverse health effects of indium are not well recognized. Therefore, it is believed that there is a high risks in indium-related industry, and it is necessary to make emergency interventions.
이광용 ( Gwang Yong Yi ),신정아 ( Jeong Ah Shin ),정지연 ( Jee Yeon Jeong ),이인섭 ( In Seop Lee ),박두용 ( Doo Yong Park ) 한국산업위생학회 2011 한국산업보건학회지 Vol.21 No.2
Objectives: Acetone/triacetine method for clearing cellulose ester membrane (CEM) filter has been a popular method for air-borne asbestos analysis. However, as a weakness of this method, it is time consuming to analyses asbestos samples after sampling. Crystalclear method can be used to analyses asbestos samples promptly after sampling. Although a strength of crystal clear method exists, there was little valid studied for the method. This study was conducted to compare acetone/triacetine method with crystalclear one for analysing asbestos sample. Methods: Test samples made in three different concentration ranges(low, medium and high concentration) were analysed by phase contrast microscopy after acetone/triacetine and crystalclear method treatment respectively. Results: We did not find statistical difference in analysed results between two methods, which were conducted in three different concentrations ranges. Conclusions: We concluded that crystalclear method can be used as clearing method for air-borne asbestos analysis instead of acetone/triacetine method.
국내 광산 종류별 근로자의 유해물질 노출 평가 : 발암성 물질을 중심으로 Focused on Carcinogenie Substanees
신용철,최병순,이병규,이광용,이지태,이종성,이정오,김기웅,고경선,김태균,정호근 한국산업위생학회 2002 한국산업보건학회지 Vol.12 No.2
The objective of this study was to assess mining workers' exposures to potentially carcinogenic air contaminants with major non-carcinogenic contaminants in various types of mines in Korea. The number of mines by type was two coal, one mica ore, one lead/zinc ore, one iron ore, and two limestone mines. The concentrations of air contaminants (total/respirable dust. crystalline silica, chromium, lead, nickel, berillum, cadmium, and fibrous particulate) were determined. The geometric means (GMs) of total dust concentrations at coal, mica, lead/ zinc ore, iron ore and limestone mines were 18.9, 1.82, 1.45, 0.95, and 1.29 ㎎/㎥, respectively, and was significantly different among the kind of mines (p</0.05). Average total dust concentrations in coal mines exceeded the occupational exposure limit for coal dust (5㎎/㎥) established by the Korea Minisry of Labor. The GMs of respirable dust concentration at coal, mica, lead/zinc ore, iron ore, coal and limestone mines were 5.15, 0.48, 0.17, 0.70, and 0.35 ㎎/㎥, respectively, and significantly different among the kind of mines (p<0.05). The GMs of total and respirable crystalline silica concentrations at coal mines were 0.13 ㎎/㎥ and 0.05 ㎎/㎥, respectively, and the values at other mines were below the limit of detection or much lower than those of coal mines. Fibrous particulate in air samples was not detected or <0.01 fibers/cc in all mine. Although the concentrations of carcinogenic metals (Cr(Ⅵ), Cr, Pb, Cd, Ni and Be) and non-carcinogenic metals (Fe and Cu) were below the exposure limits in all mines, but the carcinogenic metals were detected at relatively high levels in air samples from coal iron and limestone mines. It was found that the miniers of all the mines were exposed at lower levels to mixture of potential carcinogens and that particularly the coal miners would have the higher risks of cancer with pneumoconiosis.