• 한국가스학회지
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• 제21권3호
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• pp.46-52
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• 2017

화학물질 운송과정에서 교통사고로 인한 화학물질 누출사고가 발생할 경우에 대한 정량적 위험성평가를 실시하였고, 이를 기준으로 화학물질 운송경로의 적절성을 평가하였다. 이를 위해 사업장 내부에 설치되어 있는 화학물질 취급설비에서 화학물질 누출사고가 발생할 경우 적용하는 정량적 위험성평가방법을 제시하였고, 이를 화학물질 운송과정에 적용하였다. 운송 차량의 교통사고 건수를 분석하여 화학물질 운송시 화학물질 누출사고가 발생할 확률을 예측하였고, 차량을 이용하여 액화염소용기를 운송할 경우 발생할 수 있는 염소가스 누출사고에 대한 정량적 위험성평가에 적용하였다. 그 결과 위험도를 바탕으로 액화염소용기를 운송하는 차량의 가장 적절한 운행경로를 제시하였다.

• 한국재난관리표준학회지
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• 제1권1호
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• pp.53-62
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• 2008

석유화학 공장에서 화학 물질을 수송하는 탱크로리의 잠재적인 위험(사고의 크기 그리고 영향, 사회적인 위험)이 증가함에 따라 다양한 화학물질에 대한 운송안전 평가기준의 정립과 적극적인 위험성 평가에 관한 연구를 수행하였다. 최대예상사고분석(maximum credible accident analysis) 기법을 적용하여 "첫째 탱크로리를 이용한 취급화학물질의 대표적인 종류와 기준 비교 둘째 잠재위험에 대한 세분화된 구분 셋째 가상 사고 시나리오 파악 및 인식 넷째 가상 사고 시나리오별 위험성평가(정성/정량 - 누출원 모텔링)" 단계적 (4단계) 위험성평가를 통한 위험관리체계를 연구하였다.

• Korean Chemical Engineering Research
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• 제52권6호
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• pp.755-767
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• 2014

염소(Chlorine)는 지구상에서 가장 많이 생산되고 사용되는 화학물질 중 하나로, 비가연성 물질이지만 독성, 오존층 파괴 및 활발한 반응성을 지닌 물질이며, 현대사회는 염소와 그 유도체의 사용 없이 윤택한 삶을 유지하는 것이 거의 불가능할 정도로 의약품과 세정제, 방취제, 살균제, 제초제, 살충제 및 플라스틱을 비롯하여 공산품의 40% 이상에 사용되고 있는 지구상의 대표적인 화학물질이다. 국내의 경우, 염소는 전국의 다양한 사업장(중소기업, 정수장, 운송회사 등)에서 취급 및 유통되고 있지만 관련 운송위험과 유해성 평가 연구가 부족하여, 국내외 염소누출 관련 사고에 대해 분석 및 염소 취급 및 유통에 대한 유해성 평가를 시도하였다. 특히 화학물질 운송위험지수를 국내 실정에 맞도록 모델화하였고, 액화 염소를 포함한 13종 화학물질의 운송위험성 모사를 통해 유해성 평가를 실시하였다. 이는 염소를 비롯한 다양한 화학물질에 대한 화학물질 운송위험지수 모델을 적용하여 정형화된 유통 유해성평가를 할 수 있을 것으로 판단된다.

• 융복합기술연구소 논문집
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• 제3권1호
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• pp.51-54
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• 2013

Cadmium telluride(CdTe) nanowires were successfully synthesized from individual nanoparticles via self-assembly and the evolutionary process was investigated. The oxidation of tellurium ions on CdTe nanoparticles resulted in the organization of individual nanoparticle into twisted-nanoribbons. The nanoparticles self-assembled to twisted ribbons under light while nanoparticles under dark transformed to straight nanowires made of several layers of individual nanoparticles. The images of nanoribbons were analysed based on transmission electron microscopy and scanning electron microscopy. The photoluminescence was blue-shifted from 555 to 545nm.

• 한국환경보건학회지
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• 제46권4호
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• pp.423-432
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• 2020

Objectives: In this study, we analyzed the current state of delivery containers and packages and established handling guidelines to safely transport delivery containers and packages for use in research, testing, and examination reagents. Methods: Handling guidelines were revised in such categories as maintenance of the handling facilities, storage, loading and unloading, containers and packages, transportation, etc. In addition, we analyzed the current state of domestic sales for hazardous chemicals used for research, testing, and examination reagents, and investigated the handling guidelines related to delivery transportation in the USA, EU, and Japan by chemical property. Results: There are 6,160 companies selling hazardous chemicals. Among them, the 476 companies selling reagents for use in research, testing, and examination were investigated. Total amounts handled reached 425,000 tons, contributing to 0.2% of the total. For delivery transportation, internal containers and packaging was specified for chemical properties as follows: within 1 L for flammable gas, within 5 L for flammable liquid, and within 18 L for others. In addition, the maximum size of the outer package was set within 130 cm for total length, width, and height, and no dimension of the packaging could exceed 60 cm. Sixty-four hazardous chemicals with explosiveness or acute inhalation toxicity were prohibited for delivery transportation. Conclusion: Specified handling guidelines for inner and outer containers as well as packaging were regulated for delivery transportation of hazardous chemicals used for reagents. In addition, 64 hazardous chemicals were prohibited for delivery transportation. These are designed to prevent transportation accidents involving hazardous chemicals for reagents and thus protect the safety and health of transporters who handle hazardous chemicals.

• 융복합기술연구소 논문집
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• 제2권2호
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• pp.30-34
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• 2012

The SI thermochemical cycle process accomplishes water splitting through distinctive three chemical reactions. We focused on thermodynamic models applicable to the process. Recently, remarkable models based on the assumed ionic species have been developed to describe highly nonideal behavior on the liquid phase reactions. ElecNRTL models with ionic reactions were proposed in order to provide reliable process simulation results for phase equilibrium calculations in Section II and III. In this study, the current thermodynamic models of SI thermochemical cycle process were briefly described and the calculation results of the applied ElecNRTL models for phase equilibrium calculations were illustrated for binary systems.

• 융복합기술연구소 논문집
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• 제4권2호
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• pp.23-26
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• 2014

As an effective separation method for biomolecules, aqueous two-phase systems based on ionic liquids were suggested. Hydrophobic ionic liquids are more expensive and viscous in spite of their usage in the ionic liquid/water biphasic extraction compared with hydrophilic ionic liquids. In case of aqueous two-phase systems using hydrophilic ionic liquids, they can be diluted in aqueous phase. Experimental results show that aqueous two phase systems can be formed by adding appropriate amount of ionic liquids to aqueous salts solutions. The viscosity of ionic liquid aqueous phase is proportional to the cation chain length in ionic liquids. It is founded that the ionic liquid based aqueous two phase systems are effective for the separation of biomolecules such as acrylic acid.

• 한국전기전자재료학회논문지
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• 제27권5호
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• pp.269-275
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• 2014

In this study, chemical bath deposition method was used to grow Zinc sulfide(ZnS) thin films from $NH_3/SC(NH_2)_2/ZnSO_4$ solutions at $90^{\circ}C$. ZnS thin films have been prepared onto ITO glass. The concentrations of $ZnSO_4$ and $NH_3$ were varied while the concentration of Thiourea was fixed in 0.52 M. Structural, optical, electrical characteristic of ZnS thin films were measured. The physical and optical properties of different ZnS thin films were influenced severely by the concentration of the two reacting chemicals. The optimal concentration of $ZnSO_4$ and $NH_3$ was 0.085 M and 1.6 M, respectively.

• Bulletin of the Korean Chemical Society
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• 제29권4호
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• pp.873-875
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• 2008

• Geomechanics and Engineering
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• 제11권3호
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• pp.373-383
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• 2016

As one natural material, the physical and mechanical properties of rock will be affected very largely by chemical erosion environment. Under chemical environment, the strength of rock will be reduced. Considering the effect of the chemical erosion, fracture factor of rock is reduced. The damage variable is applied to express the change of fracture stress. Therefore, the fracture criterion of rock under chemical environment is constructed. By one experiment of rock fracture under chemical erosion environment, the proposed fracture criterion is verified. The results show that, the fracture path by theory is agree with the testing one well.