• 한국산업보건학회지
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• 제33권3호
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• pp.317-331
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• 2023

Objectives: Construction workers are exposed to various hazardous substances simultaneously. However, little is known about the exposure hazards in construction industry. This study was aimed at identifying the risk of exposure hazards among construction workers. Methods: The expert survey (n=29) was conducted, including construction industry health managers (n=11) and work environment monitoring experts (n=18), on exposure probability, intensity and risk of hazardous substances by construction occupations Results: The exposure hazards of 30 construction occupations were identified and summarized through a literature review and expert survey. The most prevalent hazards were in order of noise, awkward posture, heat/cold, crystalline silica, cement/concrete dust, metal fumes, and volatile organic compounds. The hazards with highest risk score(over seven points) at construction occupations were noise(formwork carpenter, concrete finisher, rebar worker, demolition worker, driller/rock blaster), hazardous rays(welder), heat/cold (earthworks, formwork carpenter, rebar worker, concrete placer, scaffolder), awkward posture(bricklayer, caulker/tile setter, rebar worker) and heavy lifting(bricklayer, rebar worker). Among construction workers, the job types with the highest risk of exposure to carcinogens, and in which occupational cancer has been reported, were in order of stonemason, concrete finisher, rock blaster, welder, insulation installer, painter, scaffolder, plant worker and earthworks in order Conclusions: Systematic research and discussion on occupational disease among construction workers and its various hazardous factors are needed to establish job exposure matrix for facilitating standard for promptly processing the workers' compensation.

• 한국환경보건학회지
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• 제41권6호
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• pp.412-424
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• 2015

Objectives: An ultra dry air environment of nearly ${\leq}2%$ RH is often required in lithium battery factories. The objective of this study is to evaluate the subjective eye, pulmonary, nose, and skin symptoms of workers exposed to ultra-low relative humidity and thionyl chloride. Methods: We recruited 274 workers using a self-reported questionnaire in March 2014. Those who worked in ultra-low relative humidity and with thionyl chloride were identified and their prevalence of symptoms was compared with that of other workers. We excluded white collar workers, researchers and other workers who were exposed to various hazard factors, and finally included 164 workers. Results: There were significant differences in the rate of self-reported eye and skin symptoms between exposure group_1 and exposure group_2. Exposure group_2 experienced more frequent eye, and skin symptoms. Multinomial logistic regression analysis for experience of dry eye symptoms and skin symptoms in exposure group_2 showed that dry eye symptoms (odds ratio [OR], 6.33, 95% confidence interval [CI], 2.19-18.24, p<0.001), and itchiness (OR, 6.45, 95% CI, 1.94-21.43, p<0.01) were the significant variables. The complaints of workers experiencing ultra-low relative humidity and thionyl chloride were high compared with other workers. Conclusion: These findings suggest that exposure to ultra-low relative humidity and thionyl chloride may be associated with more frequent eye and skin symptoms than exposure to ultra-low relative humidity alone. The current precautions to protect workers from the adverse effects of ultra-low relative humidity and thionyl chloride appear to be insufficient, indicating that additional management plans to reduce symptoms should be considered.

• 한국환경보건학회지
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• 제33권1호
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• pp.1-10
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• 2007

This study accomplished to grasp the present condition of HAPs and to examine efficiently carcinogenic and non-carcinogenic health effects through health risk assessment in new apartments from June, 2004 to May,2005. Moreover, we performed uncertainty analysis by Monte-Carlo analysis to control uncertainty of exposure factors. The major results obtained from this study were as follows. Firstly, cancer risk of formaldehyde for male was $1.67{\times}10^{-5}$ in CTE in point estimation. Cancer risk of formaldehyde was showed $2.94{\times}10^{-3}$ in RME that applied worst case used results of 95 percentile in point estimation. It exceeds $10^{-6}$ of guide line in US EPA. Moreover, cancer risks of formaldehyde for female were $3.98{\times}10^{-5}$ in CTE and $3.93{\times}10^{-3}$ RME. Secondly, every hazard index for non-carcinogenic pollutants was less than 1 of permitted standards in CTE. However, in RME of male, hazard indexes of 1,2-Dichloropropane and Toluene were 1.3 and 2.0, respectively. Hazard indexes of 1,2-Dichloropropane and Totuene for female in RME were 1.7 and 2.6, respectively.

• 대한환경공학회지
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• 제37권11호
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• pp.619-630
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• 2015

본 연구는 국내 폐금속 광산에 특화된 인체위해성평가 방법을 제시하고, 두 폐금속 광산 지역에 시범적으로 적용하여 광산별 중금속 오염물질(As, Cd, Cu, Pb, Zn)에 대한 인체위해도를 정량적으로 산출하고자 수행되었다. 이를 위해 폐금속 광산에 적합한 7가지 노출경로 등의 노출시나리오를 설정하고, 폐금속 광산 지역 거주 주민의 특성에 맞는 노출인자를 추출하여 인체위해성평가에 활용하였다. 또한 최종적으로 얻어진 발암 및 비발암 위해특성을 광산별, 노출경로별, 오염물질별, 수용체별로 비교 분석하였다. 두 광산 모두에서 총 초과발암위해도가 허용 가능한 위해도인 $1{\times}10^{-6}$의 값보다 크게 나타나서 발암위해성이 있는 것으로 판명되었으며, 두 광산에서의 발암위해성은 유사한 것으로 조사되었다. 또한 두 광산 모두에서 성인에 대한 위험지수가 1보다 큰 값을 보여 비발암위해성이 있는 것으로 나타났고, 어린이의 경우에는 위험지수가 1보다 작은 값을 보여 상대적으로 비발암위해성이 낮은 것으로 조사되었다. 비발암위해성은 대정광산에서 봉광산보다 상대적으로 큰 것으로 나타났다. 그리고 발암 및 비발암위해성을 유발하는 주요한 노출경로는 농작물섭취와 지하수섭취로 평가되었다. 어린이의 경우에는 성인에 비해 상대적으로 표토섭취와 표토피부접촉 경로에 의한 발암 및 비발암 위해성이 큰 것으로 조사되었다. 오염물질별 위해성을 살펴보면, 발암위해성은 As, 비발암위해성은 As, Cd, Pb 등으로부터 주로 유발되어 As가 발암 및 비발위해성의 주요한 오염물질로 조사되었다.

• 한국치위생학회지
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• 제17권6호
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• pp.1095-1107
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• 2017

Objectives: This study was designed to provide raise awareness of the guidelines associated with radiation, including those associated with ensuring safety at dental clinics. Methods: A survey was conducted on the degree of awareness on dental radiation among adults over age 20 in Seoul and Gyeonggi Province from December 2016. The questionnaire copies from 21 respondents whose answers were insincere were excluded from analysis. A total of 320 copies, equivalent to 93.4% of the total data collected, were used in the analysis. Results: Dental radiography was found to have been experienced by 60. 5% of the subjects, and 83.4% of them did not receive any explanation to the radiation exposure, while 78.7% had no experience wearing protective equipment. As a result of investigating factors affecting the recognition of dental radiation, it was found that female subjects had a higher awareness of the hazards associated with dental radiation hazard and the necessity to provide information. Conclusions: It is necessary to educate the dental medical personnel to raise awareness on radiation exposure and the need for protective equipment, especially when checking for pregnancy.

• 한국수자원학회논문집
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• 제48권12호
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• pp.1037-1049
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• 2015

북한의 대규모 자연재난은 홍수와 태풍 그리고 집중호우로 인한 수해피해가 대부분이며 이러한 피해는 1990년대 중반부터 해마다 북한의 경제난을 악화시키고 있다. 북한 당국도 수해피해의 심각성을 인식하여, 1990년대 말부터 하천정리, 농경지 복구, 토지정리사업, 조림사업 등을 실시하였으나, 계속되는 수해피해를 막지 못하고 있다. 본 연구는 상습적으로 발생하는 북한의 홍수피해에 대한 위험도를 산정하기 위해 일반적인 위험도 평가과정은 동일하게 유지하되 대외적으로 수문자료 취득이 힘들고 지형자료가 공개되지 않은 미계측지역이라는 유역특성을 반영하여 강우-유출에 대한 모의를 추가적으로 실시하였다. 또한, 위험도 평가는 국제기구(IPCC)의 기준에 따라 홍수에 대한 위험성과 노출성, 취약성 인자들을 선정하여 홍수 위험도를 판단하였다.

• 한국산업보건학회지
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• 제34권1호
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• pp.1-7
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• 2024

Objectives: The study was performed to investigate characteristics of hazardous factors regarding chemical(liquid lime) tank dredging workers by case survey. Methods: Field data such as working condition, MSDS and respirators applied to chemical tank dredging work were analyzed and the work environmental factors of noise and indoor air quality were measured to compare existing data with actual work situations. Results: No health hazards to workers due to working conditions were confirmed during dredging work inside the chemical storage tank. All air quality measurement data during dredging work satisfied the management standards, and there were no by-products. During dredging work, there was a significant change in noise depending on the type of work, but considering the noise reduction rate(NRR) of the earplugs worn by workers, there was no actual health hazard due to noise exposure. Conclusions: A fit test for respirator and the expiration date of the safety helmet should be observed to ensure an appropriate level of safety and health for dredging workers in the chemical storage tank.

• Safety and Health at Work
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• 제15권1호
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• pp.87-95
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• 2024

Background: This study focuses on assessing occupational risk for the health hazards encountered during maintenance works (MW) in semiconductor fabrication (FAB) facilities. Objectives: The objectives of this study include: 1) identifying the primary health hazards during MW in semiconductor FAB facilities; 2) reviewing the methods used in evaluating the likelihood and severity of health hazards through occupational health risk assessment (OHRA); and 3) suggesting variables for the categorization of likelihood of exposures to health hazards and the severity of health effects associated with MW in FAB facilities. Methods: A literature review was undertaken on OHRA methodology and health hazards resulting from MW in FAB facilities. Based on this review, approaches for categorizing the exposure to health hazards and the severity of health effects related to MW were recommended. Results: Maintenance workers in FAB facilities face exposure to hazards such as debris, machinery entanglement, and airborne particles laden with various chemical components. The level of engineering and administrative control measures is suggested to assess the likelihood of simultaneous chemical and dust exposure. Qualitative key factors for mixed exposure estimation during MW include the presence of safe operational protocols, the use of air-jet machines, the presence and effectiveness of local exhaust ventilation system, chamber post-purge and cooling, and proper respirator use. Using the risk (R) and hazard (H) codes of the Globally Harmonized System alongside carcinogenic, mutagenic, or reprotoxic classifications aid in categorizing health effect severity for OHRA. Conclusion: Further research is needed to apply our proposed variables in OHRA for MW in FAB facilities and subsequently validate the findings.

• Journal of Nutrition and Health
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• 제44권1호
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• pp.61-73
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• 2011

본 연구는 유해물질 인체 노출 요인의 가장 큰 부분을 차지하는 식생활에 대한 과학적이고, 유해물질 인체 노출 조사 결과의 신뢰성을 높일 수 있는 표준화된 설문지를 개발하는 것이다. 본 연구의 결과를 요약하면 다음과 같다. 1) 본 연구에서는 문헌고찰 및 자문회의를 통해 식품으로인한 유해물질 노출의 대상물질을 11종 선정하였다. 11개 유해물질은 프탈레이트, 아플라톡신, 비스페놀A, PAHs, 다이옥신, PCBs, 수은, 납, 카드뮴, 비소, 아크릴아마이드를 선정하였다. 2) 선정된 유해물질별로 종류와 특성을 파악하고, 식품을 통한 노출 수준, 노출방법, 노출경로 등을 조사하였다. 유해물질별로 노출 특성을 반영하여 선정된 11개의 유해물질 노출평가를 위한 공통 설문 문항을 도출하였다. 3) 11개의 유해물질 노출평가를 위한 설문지를 토대로 통합적인 설문지를 개발하였다. 개발한 식생활 조사지는 인구학적 특성, 직업 특성, 사회경제적 특성, 건강 관련 특성, 식품 섭취 행태 관련 문항을 포함하였다. 식품섭취행태를 조사하기 위해 19개의 식품군을 세분화하여 총 99개의 식품목록으로 개발하였고, 지난 1년간 섭취한 식품의 빈도와 구매시 주로 사용하는 용기, 보관시 주로 사용하는 용기, 주로 사용하는 조리방법에 대한 질문을 포함하였다. 이상의 연구 결과를 토대로 본 연구에서 개발한 식품으로 인한 통합적 유해물질 노출평가 설문 조사지를 이용하여 우리 국민의 유해물질 노출 수준을 파악하고, 위험 집단을 선별하는 연구 수행을 실시할 수 있을 것이다. 이를 통해 유해물질 노출관리를 위한 정책 수립을 위한 기초 자료를 생산할 수 있다는데 그 의의가 있다.

• 대한안전경영과학회지
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• 제25권1호
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• pp.7-14
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• 2023

We attempted to provide an overview of the laws and current state of the 3D printing industry in South Korea and around the world, using the annual industry surveys and the Wohler report. Additionally, we reviewed articles relating to the potential exposure to hazards associated with 3D printing using metal materials. In South Korea, there were 406 3D printing-related businesses, employing 2,365 workers, and the market size was estimated at 455.9 billion won in 2021. Globally, the average growth rate of the 3D printing industry market over the past 10 years was 27.4%, and the market size was estimated at $11.8 billion in 2019. The United States had the highest cumulative installation ratio of industrial 3D printers, followed by China, Japan, Germany, and South Korea. A total of 6,168 patents related to 3D printing were registered in the US between 2010 and 2019. Harmful factors during metal 3D printing was mainly evaluated in the powder bed fusion and direct energy deposition printing types, and there is a case of material extrusion type with metal additive filaments. The number, mass, size distribution, and chemical composition of particles were mainly evaluated. Particle concentration increases during the opening of the chamber or post-processing. However, operating the 3D printer in a ventilated chamber can reduce particle concentration to the background level. In order to have a safe and healthy environment for 3D printing, it is necessary to accumulate and apply knowledge through various studies.