• 제목/요약/키워드: Chemical substances management

검색결과 202건 처리시간 0.029초

Experiment on the Feasibility of Cleaning Building Pipelines using Ultrasonic Cavitation

  • Jo, Jae-Hyun;Lee, Ung-Kyun;Kim, Jae-Yeob;Lee, Sungchul;Kim, Kukhyun
    • 국제학술발표논문집
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    • The 9th International Conference on Construction Engineering and Project Management
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    • pp.295-303
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    • 2022
  • Residential heating systems in South Korea are largely based on the use of ondol pipelines. Heat is transferred to the floor by passing hot water through a metal or plastic pipe buried within the concrete of the floor. Consequently, it is difficult to clean the inside of these pipes after installation. Over time, foreign substances such as scale accumulate in the pipe when the ondol heating method is used for an extended period. Therefore, in the past, pipes were cleaned by removing foreign substances attached to the inside surfaces of the pipes using high-pressure water or by disassembling the pipes and removing foreign substances with chemical agents. Recently, a method for removing foreign substances through the cavitation effect of ultrasound has been proposed. This idea might lead to the development of new technologies for cleaning pipe interiors. Consequently, this study investigated the use of ultrasound to clean pipes embedded in concrete. In this study, devices that generated ultrasonic waves with various frequencies and directions were prepared. After preparing arbitrarily contaminated pipes, the appropriate frequency, output strength, and output direction for each foreign substance were determined through repeated experiments. The results of this experiment could provide important information for future methods of cleaning the interior of ondol piping systems.

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우리나라 산업안전보건법상 특별관리물질 규정에 대한 독일, 영국 및 일본과의 비교법적 고찰 (A Comparative Legal Study of Germany, the United Kingdom, Japan and Korea for the Regulations on Special Management Materials)

  • 최상준;피영규;김신범;김원
    • 한국산업보건학회지
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    • 제23권2호
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    • pp.137-147
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    • 2013
  • Objectives: This study was conducted in order to evaluate the limitations of the regulations on the safety and health standards for special management materials(SMM) under the Industrial Safety and Health Act in Korea. Methods: Hazardous chemicals management systems in Germany(Hazardous Substances Ordinance), the UK(Control of Substances Hazardous to Health Regulations), Japan(Ordinance on Prevention of Hazards due to Specified Chemical Substances) and Korea(Regulation of Occupational Safety and Health Standards, ROSHS) were investigated and compared in terms of 14 items. Results: Among the 14 items, we eventually found seven items which should be amended: 1) definition and scope, 2) general duties clause, 3) principles of management, 4) preventive measures, 5) control measures, 6) risk assessment, and 7) record keeping. The principal limitations of Korean regulations in comparison with those of other countries were that there were no preventive measures such as substitution, and no principles of good practices for the control of exposure to SMM. In terms of control measures, there were no regulations on suitable workplace design, reducing the number of exposed workers, reducing the level and duration of exposure, and reducing the quantity of hazardous substances in ROSHS. Conclusions: Based on the results of this study, ROSHS should be complemented with preventive measures and the principles of management related to SMM. According to the suggestions, an employer who deals with SMM should preferably consider the possibility of substitution and perform substitution so far as is reasonably practicable.

연구활동종사자 작업환경측정 결과 및 제도개선 방향 (Work Environment Measurement Results for Research Workers and Directions for System Improvement)

  • 황제규;변헌수
    • 한국산업보건학회지
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    • 제30권4호
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    • pp.342-352
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    • 2020
  • Objectives: The characteristics of research workers are different from those working in the manufacturing industry. Furthermore, the reagents used change according to the research due to the characteristics of the laboratory, and the amounts used vary. In addition, since the working time changes almost every day, it is difficult to adjust the time according to exposure standards. There are also difficulties in setting standards as in the manufacturing industry since laboratory environments and the types of experiments performed are all different. For these reasons, the measurement of the working environment of research workers is not realistically carried out within the legal framework, there is a concern that the accuracy of measurement results may be degraded, and there are difficulties in securing data. The exposure evaluation based on an eight-hour time-weighted average used for measuring the working environment to be studied in this study may not be appropriate, but it was judged and consequently applied as the most suitable method among the recognized test methods. Methods: The investigation of the use of chemical substances in the research laboratory, which is the subject of this study, was conducted in the order of carrying out work environment measurement, sample analysis, and result analysis. In the case of the use of chemical substances, after organizing the substances to be measured in the working environment, the research workers were asked to write down the status, frequency, and period of use. Work environment measurement and sample analysis were conducted by a recognized test method, and the results were compared with the exposure standards (TWA: time weighted average value) for chemical substances and physical factors. Results: For the substances subject to work environment measurement, the department of chemical engineering was the most exposed, followed by the department of chemistry. This can lead to exposure to a variety of chemicals in departmental laboratories that primarily deal with chemicals, including acetone, hydrogen peroxide, nitric acid, sodium hydroxide, and normal hexane. Hydrogen chloride was measured higher than the average level of domestic work environment measurements. This can suggest that researchers in research activities should also be managed within the work environment measurement system. As a result of a comparison between the professional science and technology service industry and the education service industry, which are the most similar business types to university research laboratories among the domestic work environment measurements provided by the Korea Safety and Health Agency, acetone, dichloromethane, hydrogen peroxide, sodium hydroxide, nitric acid, normal hexane, and hydrogen chloride are items that appear higher than the average level. This can also be expressed as a basis for supporting management within the work environment measurement system. Conclusions: In the case of research activity workers' work environment measurement and management, specific details can be presented as follows. When changing projects and research, work environment measurement is carried out, and work environment measurement targets and methods are determined by the measurement and analysis method determined by the Ministry of Employment and Labor. The measurement results and exposure standards apply exposure standards for chemical substances and physical factors by the Ministry of Employment and Labor. Implementation costs include safety management expenses and submission of improvement plans when exposure standards are exceeded. The results of this study were presented only for the measurement of the working environment among the minimum health management measures for research workers, but it is necessary to prepare a system to improve the level of safety and health.

국내 화학물질의 물리적위험성 분류·구분 단일화에 관한 연구 (A Study on Harmonized Classification and Categorization for Physical Hazards of Chemicals in Korea)

  • 이봉우;신동일
    • 한국가스학회지
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    • 제21권4호
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    • pp.30-41
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    • 2017
  • 화학물질은 인류생활과 산업발전을 크게 향상시키며 인류에 많은 이익을 주었지만 일부 위험물질은 인체의 건강과 환경에 유해한 영향을 끼쳐 오래전부터 선진국들은 엄격한 안전기준을 정하여 관리하고 있다. 우리나라는 세계 화학시장의 약 3.4%를 차지하는 화학 강대국으로 성장하고 있다. 국내외 화학물질 관련 법률은 유사하지만 세부적으로는 상이한 점이 많아 안전과 환경에 많은 위험을 주고 산업체 등에게 혼란을 야기시키고 있는 실정이다. 이러한 문제점을 해결하기 위하여 국내 화학물질 관련법과 국제 표준화제도(GHS)를 통일화하고자 하였으며, 산업체의 수출입 시 무역장벽을 해소하고, 위험물에 대한 사고예방 및 대응의 기본이 되는 선진형 물리적 위험성 분류 구분 단일화 방안을 제시하였다.

Research on Step-Type Chemical Liquid Deodorizer using Liquid Catalyst

  • WOO, Hyun-Jin;KWON, Lee-Seung;JUNG, Min-Jae;YEO, Og-Gyu;KIM, Young-Do;KWON, Woo-Taeg
    • 식품보건융합연구
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    • 제6권5호
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    • pp.19-25
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    • 2020
  • The purpose of this study was to research and develop a step-type chemical liquid deodorizer including a liquid catalyst that can prevent civil complaints due to odor due to its excellent deodorizing performance. The main composition of chemical liquid deodorizer including liquid catalyst is cleaning deodorization, catalyst deodorization, chemical deodorization, water film plate, deodorization water circulation device, deodorization water injection device, catalyst management system, gas-liquid separation device, chemical supply device, deodorizer control panel, etc. It consists of a device. The air flow of the step-type liquid catalyst chemical liquid deodorizer is a technology that firstly removes basic odor substances, and the liquid catalyst installed in the subsequent process stably removes sulfur compounds, which are acidic odor substances, to discharge clean air. The efficiency of treating the complex odor of the prototype was 98.5% for the first and 99.6% for the second, achieving the target of 95%. The hydrogen sulfide treatment efficiency of the prototype was 100% for the first and 99.9% for the second, which achieved 95%, which was the target of the project. As a result, ammonia was removed by the reaction of ammonia and hydrogen sulfide.

하수기반역학을 이용한 커뮤니티 생활상 및 건강 관리: 물 인프라의 새로운 가치 (Wastewater-based epidemiology for the management of community lifestyle and health: An unexplored value of water infrastructure)

  • 조은혜;김형일;최용주;윤영호;이도연;김근영
    • 상하수도학회지
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    • 제33권1호
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    • pp.63-77
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    • 2019
  • Traditional wastewater research mainly focuses on 1) estimating the amount of waste entering sewage treatment facilities, 2) evaluating the treatment efficiency of sewage facilities, 3) investigating the role of sewage treatment effluent as a point source, and 4) designing and managing sewage treatment facilities. However, since wastewater contains a variety of chemical and biological substances due to the discharge of human excreta and material used for daily living into it, the collective constituents of wastewater are likely a reflection of a community's status. Wastewater-based epidemiology (WBE), an emerging and promising field of study that involves the analysis of substances in wastewater, can be applied to monitor the state of a defined community. WBE provides opportunities for exploiting indicators in wastewater to fulfill various objectives. The data analyzed under WBE are those pertaining to selected natural and anthropogenic substances in wastewater that are a result of the discharge of metabolic excreta, illicit or legal drugs, and infectious pathogens into the wastewater. This paper reviews recent progress in WBE and addresses current challenges in the field. It primarily discusses several representative applications including the investigation of drug consumption across different communities and the management of community disease and health. Finally, it summarizes established indicators for WBE.

다매체 환경 모델 MUSEM을 이용한 유해화학물질의 환경거동예측 모델링 (Modeling for the fate of Organic Chemicals in a Multi-media Environment Using MUSEM)

  • 노경준;김동명
    • 한국해양환경ㆍ에너지학회지
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    • 제10권4호
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    • pp.201-210
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    • 2007
  • 생태계로 유입되는 POPs, EDCs, PBTs 등과 같은 화학물질에 의한 오염은 점점 복잡다양화 되고 있으며, 사람의 건강이나 생태계에 돌이킬 수 없는 피해를 가져올 우려 또한 증가되고 있다. 그러나 위해성 평가의 중요한 과정중 하나인 화학물질의 노출량 산정 부분에 대한 적정한 평가가 이루어지지 않는 경우가 많았다. 본 연구에서는 환경매체 중 화학물질량 산정에 있어 보다 효율적인 모델링 수행을 위하여, 화학물질의 물성 데이터베이스 및 지역 개황 데이터베이스 등과 프로그램으로 연계되어 있으며, 동시에 여러 대상물질이 시뮬레이션 가능한 다매체환경모델 MUSEM(Multi-media Simple box-systems Environmental Model)을 이용하여 62종의 화학물질에 대하여 일본 47개 지역의 환경매체 중 농도예측 및 동경지역에 대한 민감도 분석을 통하여 모델의 적용성을 검토하였다. 이러한 62종의 물질에 대한 매체별 잔류비(%)는 수역에 고비율로 분포하는 물질이 많은 것으로 예측되었다. 옥탄올-물 분배계수에 따른 환경매체중의 화학물질 농도변화는 도시산업용지의 토양 및 담수의 저질에서 상대적으로 크게 나타났으며, 대기와 담수에서는 상대적으로 작게 나타났다. 분해계수에 의한 환경매체중의 화학물질 농도변화는 육수역 물환경 및 도시산업용지의 토양, 육수역의 저질에서의 변화폭이 비슷하게 나타났으며 대기의 경우는 상대적으로 작게 나타났다.

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유해화학물질 안전관리를 위한 중소사업장의 위험도 분류에 관한 연구 (A Study on Risk Classification of Small Plant for Safe Management of Hazardous Chemicals)

  • 이효은;김민규;이봉우
    • 한국산업융합학회 논문집
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    • 제24권5호
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    • pp.609-615
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    • 2021
  • Chemical accidents can happen anywhere in the world. To prevent chemical accidents, Korea introduced the Chemicals Control Act. However, Small and medium-sized businesses do not meet these regulations. Accordingly, the Ministry of Environment is providing a chemical safety management support project for Small and medium-sized businesses. However, there are many small and medium-sized businesses, and businesses that need support need priority. In this study, the risk of the plants was classified into hig h, medium, and low risk based on four methods. As a result, out of 90 plants subject to the study, high risk was 30% and medium risk was 70%. The industries with the high risk were chemical products manufacturing and paint manufacturing. The plating and printing industries showed relatively medium risk. This risk classification has the advantage that it can obtain intuitive and quick results. These studies can be used as basic data for chemical safety management of local governments and Ministry of Environment.

환경부의 화학물질관리법, 화학물질등록 및 평가에 관한 법률, 고용노동부의 산업안전보건법의 화학물질 관련 내용 비교 (Comparison between the Chemical Management Contents of Laws Pertaining to the Ministry of Environment and the Ministry of the Employment and Labor)

  • 윤충식;함승헌;박지훈;김선주;이상아;이권섭;박동욱
    • 한국환경보건학회지
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    • 제40권5호
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    • pp.331-345
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    • 2014
  • Objectives: The exponential growth of chemicals, an area of high concern in developed countries like the US (i.e., the Gore Initiative) and in the EU (i.e., REACH), as well as recent chemical accidents in Korea, have provoked nationwide concerns and resultant legal enforcement. This study aims to compare the laws of the Ministry of Environment (the Chemical Substances Control Act (CSCA), Act on the Registration and Evaluation, etc. of Chemical Substances (ARECS)) with those of the Ministry of the Employment and Labor (Occupational Safety and Health Act (OSHA)). Methods: Each law pertaining to the Ministry of Environment and the Ministry of the Employment and Labor was downloaded from the official legal information system (www.law.go.kr). The objectives of each law and the major contents related to chemical management were compared and summarized. Results: The CSCA and the ARECS are focused on the protection of people and the environment, while the OSHA relates to the protection of workers. The right to know of people and workers has been reinforced. The former two laws emphasize prevention, but the OSHA contains both preventive and post-accident measures. The role of the Ministry of Employment was reinforced with the promulgation of the CSCA and ARECS, which contain regulations such as adjacent area impact evaluation, risk control planning, chemical statistical survey and construction and operation of information, provision of risk control plans, response to chemical accidents and registration of chemical substances. Conclusion: We found that the three laws discussed here have several similar clauses designed to protect people and the environment from risks that may be caused by the use of chemicals, even though there are some differences among them in terms of objectives and contents. This review concluded that several clauses that can be regarded as double regulation should be unified in order to minimize the waste of government administrative resources and socio-economic losses.

화학물질 취급시설의 안전관리 합리화 방안 연구: 건축물 내화기준 중심 (A study on the Rationalization of Safety Management in Chemical Facilities: Focused on Architecture Fire Resistance Standards)

  • 이은별;유병태
    • 한국화재소방학회논문지
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    • 제33권3호
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    • pp.91-97
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    • 2019
  • 국내 화학물질 안전관리는 환경부의 화학물질관리법이 기본이 되어 관리되고 있다. 그 중에서도 취급시설의 설치 및 관리기준을 강화하여 관리하고 있는데, 타 법과의 상충, 시설 규모 및 물질 특성 미반영 등으로 인한 문제점들이 노출되었다. 본 연구에서는 이러한 취급시설 기준 중 건축물 내화기준에 대해 보다 현실적이면서 합리적인 개선 방안을 마련하고자 하였다. 이를 위해 국내 유사 화학물질 취급시설 안전관리 법령의 건축물 내화기준을 비교하였으며, 환경부 화학물질안전원 국민신문고를 통해 접수된 취급시설 기준 관련 민원 2220건 중 대표 민원 사례를 통해 주요 문제점을 파악하였다. 마지막으로 화학물질관리법상 취급시설의 규모와 물질의 종류를 구체화하여 건축물 내화기준을 적용하는 개선 방안을 제시하였다. 향후, 본 연구 결과는 환경 유해성을 고려한 화학물질관리법의 기본 취지에 부합하고, 산업계에도 현실적으로 적용될 수 있는 합리적인 기준마련에 기여할 수 있을 것으로 기대된다.