This study attempted to provide implications by analyzing the impact of business Owner’s safety commitment on industrial accidents and examining the mediating role of management supervisors’ safety leadership and worker participation. Analysis was conducted on 2,067 manufacturing sites with 20 to 50 employees in the 10th Occupational Safety and Health Survey data. SPSS waw used to secure the reliability of the measurement variable. Hypothesis vertification was carried out after securing the suitability and validity of the structural model using AMOS. The direct impact of three latent variables on industrial accidents was confirmed: the business owner’s safety commitment, the management supervisor’s safety leadership, and the worker participation. The employer’s safety will and the management supervisor’s safety leadership do not directly affect industial accidents, but it has been verified that worker participation has a diret impact on industrial accident reduction. In addition, it has been confirmed that the safety leadership and worker participation of the management. Supervior have a complete mediating effect on the reduction of industrial accidents by mediating with the safety leadership of the management supervior and the participation of the workers. This study analyzed the impact on industrial accidents by dividing the stakeholders constituting the workplace into three classes: business owners, superviors, and workers, but the results suggest that employers and all workers inside the workplace may be organically linked to achieving the goal of reducing industrial accidents. Therefore, in order to establish an autonomous safety management system for safety and health at workerplaces, efforts are needed to reduce industrial accidents in their respective location by forming an organic community among internal stakeholders.

In spite of lab safety act for over 10 years, over 100 safety accidents in the laboratory have been constantly occurring. The ideal safety management system is to prevent accidents by differential classifying and managing laboratory regulatory materials according to the risk level. In order to approach this system, in-depth interviews with safety managers were first conducted to identify the current status of safety management in domestic university laboratories. And then through comparative analysis of safety management systems in domestic and foreign laboratories, a new regulatory substance classification standard based on the analysis of the hazards and the classification of risk grades, and a safety management system are proposed. From this study, it will contribute to the creation of a safe laboratory environment by differential classification and management laboratory regulatory materials based on the risk level.

The government announced that it would ask the contractors not only the supplier but also the contractors to take the same responsibilities if they did not observe industrial accident safety measures from 2019. The semiconductor manufacturing process belongs to the representative disaster industry group in which the facility is directly located inside a closed space called clean room. According to previous studies, the semiconductor industry group used checklists for safety management of their suppliers. This study has developed a model for assessing suppliers by constructing a quantitative checklist item through the risk assessment methodology, laws and regulations. The evaluation model of the supplier set up through this study becomes the safety management standard in the semiconductor industry .Furthermore, it is applied to the partner companies in the operation of ISO 14001, 45001, I would like to apply it as a measure of performance management for CSR (Corporate Social Responsibility).

The steel pipe manufacturing industry deals with facilities and materials. Especially thermal facilities are close to vapor cloud explosion (VCE) and may cause secondary damage to facilities because they deal with corrosive substances such as hydrofluoric acid, sulfuric acid and acid, fire, explosion, leakage etc. It is in danger. In this study, hazard identification method was conducted using HAZOP techniques and quantitative risk analysis was conducted using e-CA, a program that supports accident impact analysis. Equipment in the influence range of ERPG - 3 was determined to be a facility requiring replacement. It was decided that neutralization is necessary using slaked lime. Based on the cost of loss, We presented the proper replacement which is the timing of the dangerous facility. As a result, It was ideal to replace the facilities with 20 years of heat treatment facilities, one year of hydrofluoric acid storage tank, 20 years of sulfuric acid storage tank, and 5 years of hydrochloric acid storage tank.

As the chemical industry becomes more advanced, the awareness of chemical accidents is rising, and legal systems for chemical safety management are strengthened. In this study, quantitative risk assessment of liquid chlorine leak was conducted. Risk assessment was performed in the order of frequency analysis, consequence analysis, and risk calculation. The individual risk was presented in the form of contour lines. The social risk was expressed by the FN curve. The risk of day and night was in an unacceptable area, so it was required to mitigate risk. Therefore in-building, which could trap the pool, was selected as a risk mitigation measure. As a result of the cost benefit analysis, it was concluded that this measure should be reasonably implemented.

This study measured concentrations of formaldehyde, a pollutant in the indoor air in three departments, before and after the renovation of a medical facility used by the general public, and conducted a health survey on workers' subjective symptoms. The average concentration of formaldehyde was 25.8 ± 8.7 μg/m3 before the renovation and 47.3 ± 6.7 μg/m3 after the renovation. The concentration was increased; however, it did not exceed the maintenance standard set by the law. Measured concentration was high both before and after the renovation in the office, and the biggest difference was shown in the concentration change. For eight symptoms including dry throat, there were more workers who expressed the symptoms after the renovation than those who expressed them before the renovation. Factors that influenced subjective symptoms were the effects before and after the renovation. Even when formaldehyde does not exceed the maintenance standard set by the law, detailed and systematic management is required and adequate health effect evaluation or education is necessary, considering the characteristics of medical facilities.

Classify of explosion hazardous areas must be made at the site where flammable materials are used. This reason is that it is necessary to manage ignition sources in of explosion hazardous areas in order to reduce the risk of explosion. If such an explosion hazard area is widened, it becomes difficult to increase the number of ignition sources to be managed. The method using the virtual volume currently used is much wider than the result using CFD(Computational Fluid Dynamics). Therefore, we tried to improve the current method to compare with the new method using leakage characteristics. The result is a realistic explosion hazard if the light gas is calibrated to the mass and the heavy gas is calibrated to the lower explosion limit. However, it is considered that the safety factors should be taken into account in the calculated correction formula because such a problem should be considered as a buffer for safety.

Research and development activities have been actively conducted at universities, research institutions and research laboratories which belong to corporations. Because of blooming research and development activities in various fields, safety accidents in the laboratories happen consistently. The government office established Act on the establishment of safe laboratory environment to decrease safety accident rates and make environment of laboratories better, and it is effective slowly. However, in the case of laboratory safety management of the laboratory where various research and development activities are carried out. So it is difficult to closely monitor them. Even though safety inspections and periodic inspections is regularly conducted, these are focused on facilities and environment. According to a study of Dea-deok science town safety council, accidents in laboratories of 73% have arisen out of careless actions. Therefore, it is important for researchers to know to potential harmful factors in research. there is necessary to make a system to prevent laboratory accidents. The purpose of this study is that the researchers discovered potential hazard factors in laboratories. For that, foreign laboratory safety management systems has applied to domestic laboratories. Four laboratories in targeted institution has been selected to apply the appropriate personal protection equipments, job safety assessment and standard operating procedures. And I found the limitations of the process according to the excavations harmful factors in the research process. To overcome these limitations, Suggest a laboratory safety management system. This study discovered current laboratory safety system limitations and provides alternatives so that effective safety management can be achieved

착체증합법 및 연소합성법에 의해 Zn0.994Mn0.006Ga2O4녹색형광체 분말을 합성하였으며, 이들의 분말 및 발광특성을 XRD, SEM, BET, PL 등을 사용하여 조사하였고, 이를 고상반응법에 의하여 합성한 시료와 비교하였다. 착체중합법과 연소합성법에 의해 합성한 시료는 각각 500˚C와 400˚C에서 단일 스피텔 상이 생성되었으며, 이들의 입자크기는 고상반응에 의해 합성된 분말에 비하여 작았다. 한편, 착체중합법에 의하여 합성한 분말의 발광강도는 열처리 온도가 900˚C일 때, 연소합성법에서는 반응온도가 400˚C일 때 각각 최대값을 나타내었다.

Landfill gases (LFGs), which consists of sulfur compounds, odorous substances such as ammonia and amines, and volatile organic compounds (VOCs), is generated during the natural process of bacterial decomposition of organic material contained in municipal solid waste (MSW) landfills. The VOCs in the LFGs cannot be only decomposed easily into the soil after landfilling but they also can cause serious problems for the surrounding atmosphere, soil, and groundwater because of their toxicity. Moreover, VOCs have been identified as precursors of photochemical smog and they are toxic and carcinogenic chemicals. Furthermore, VOCs comprise a low rate of the emissions, but they can cause cancer. Therefore, it is important to evaluate the hazard causing by VOCs in LFGs. This study is aim to identify chemicals in LFGs and the hazardous evaluation by mixing between chemicals in LFGs. The selected landfill site in the study is located in Daejeon. Waste generation data were obtained from the Ministry of Environment (MOE) of South Korea. To evaluate the amount of the selected VOCs (47) among the primary disintegration models, LFGs generation model in LandGEM program was used. For the gas mixing reaction, a program called CRW 4.0 was introduced by the NOAA in the United States was used. As a result, the cumulative capacity of landfills in 2015 was estimated at 7,650,682 tons. Therefore, the total LFGs generation in 2015 was 7.717 × 107m³. Also the LFGs showed almost all the hazardous reactions with NOx and O3 in the atmosphere. As VOCs in LFGs mixed air emissions, we confirmed that toxic potential gases such as phosgene, hydrogen halides, halogenated organics, chlorinated amines and acidic fumes are generated.

Since the 1990s, waste policies of the South Korean government have focused on resource recycling societies that reduce the amount of waste landfill and increase the amount of waste recycling. In South Korea, the implementation of various environmental policies and efforts has led to the highest recycling rate in the world; however, after 2011, the recycling rate of household waste has been stagnant. Therefore, to convert such waste disposal problems into a resource recycling socioeconomic regime conforming to the national policy, establishing a tool to evaluate the appropriate management policy of household waste is necessary. In this study, a waste management evaluation index was developed and applied to identify and evaluate trends in the waste disposal methods. For the evaluation index, we considered two points of evaluation, i.e., “waste recycling increases and waste landfill decreases” and “the current waste recycling rate is taken into consideration.”. The data of waste disposal of 2007, 2012 and 2015 in 16 municipalities was used. The results shows that the highest absolute index was (+)28 in Chungbuk, whereas the lowest was analyzed as (-)10 in Daegu. Moreover, the cities with high recycling rates and low landfill rates were Seoul and Busan, while Jeonnam had the low recycling rate and the high landfill rate. Furthermore, Chungnam and Chungbuk were very likely to develop further, whereas Daegu and Incheon had a very low possibility of development. This waste management evaluation index and method can be one important tool and approach and can support more sustainable and resource recycling socioeconomic.

According to “Korea Environment Corporation (KECO): Statistical data of specified waste generation and treatment,” the amount of designated waste generated in 2015 was 4,691,532 tons, which is 51.7% higher than the 3,092,591 tons generated in 2005, and the annual output is steadily increasing by 3.25%. Therefore, in order to properly manage the specified wastes, it is necessary to divide them according to the type of industry and waste type and to evaluate the trend of specified waste generation in advance and establish a specified waste management plan. However, due to the statistical data collection and administrative procedures, the timing of the publication of national statistical data is somewhat delayed after the actual generation of specified waste. Since the “National Waste Comprehensive Plan” assumes that GDP and manufacturing output will increase by 4% every year and predicts the amount of specified waste generation in the future, there is a great deal of pressure to use this in the actual field. In this study, we analyzed the correlation between the production index, which is an economic index indicating the change in the output of the products produced by the industry, and the specified waste generation amount. Based on the actual production index, the specified waste statistics for 2017 were predicted and compared with the estimated amount and the actual amount for the 2010 ~ 2015 period.

The objective of the current study was to analyze the current safety status of formaldehyde. More than 670 manufacturers in 15 business sectors were enrolled. A MFA of the manufacturers showed that manufacturer M, which specializes in the manufacture of basic organic chemicals, used the most formaldehyde (120,000 tons), and manufacturer B, which specializes in the manufacture of general varnish and related products, used the least (8 tons). The results of this study can be used to collect scattered material flow and identify different parts of the country where a nationally produced substance, such as formaldehyde, can be stored. The details of the toxicity reflected in the composition and the amount of formaldehyde are likely to be utilized to produce personal protective equipment.

The separation method of Au (III) was studied by a chelating resin, Amberlite A-21. Sorption capacities for the metal ions on the Amberlite A-21 have been measured by batch method. This resin was applied to the rapid concentration of trace amounts of these metal ions and to the separation of Gold (III) from other metal ions in bulk solution. The separation of those elements was carried out with Acetone and Thiourea as eluents.