• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.20 no.1
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• pp.63-69
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• 2010

This study was conducted to compare the concentration of various air contaminants in nine different laboratories during routine activities. Volatile organic compounds (VOC) were sampled and analyzed using NIOSH Method 1500 and asbestos fibers were sampled and analyzed using NIOSH Method 9002 and 7400. Detectable levels of acetone, toluene and ethanol were found in all the laboratories and xylene and n-hexane were detected in eight of the nine laboratories. All the VOC concentrations were well below the Korean Ministry of Labor's Exposure Limit and American Conference of Governmental Industrial Hygienists' (ACGIH) Threshold Limit Values (TLVs). Total VOC concentrations at the university laboratories were significantly higher than those at governmental agency laboratories. Airborne fiber concentrations were below 0.01 fibers/cc, while the concentration of chrysotile was 2% in insulation materials sprayed on the ceiling of one laboratory. While all the governmental agency laboratories (n=4) had fume hoods, two out of the five university laboratories did not have fume hoods. The capture velocity of half of the fume hoods were below the maintenance standard(0.4 m/sec). In conclusion, the study suggests that the current controls in place at both university and government agency laboratories are not sufficient in limiting exposure to harmful chemicals to non-detectable levels, though they appear to be adequate in protecting workers to levels below applicable occupational exposure limits. The study also suggests that researchers working in university laboratories may be exposed to greater levels of contaminant than those working in government agency laboratories.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.790-791
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• 2016

The system used in the laboratory of chemistry and medical is management only by measuring the temperature inside the reagent management within and recording in handwriting. When you hold the reagent, it can not recognize in real time the problems that occur in the interior, an accident occurs. you can not find a use record reagent storage, a problem with the management of an efficient reagent can be generated. In this paper, we propose a reagent management system that leverages the embedded boards and sensors in the laboratory reagents effectively manage to resolve it. As a result, Converting the information of the reagent to the data using the NFC, the administrator can identify the reagent user to register and manage hazardous reagents. Converted by using the NFC information of the reagent to the data, the administrator can identify the reagent user to register and manage hazardous reagents, temperature, humidity, so that it can be controlled by utilizing the VOC sensor to. Also it is passes the message to the administrator in the event of a particular risk situation. This is believed to enable the effective administration in a laboratory reagent.

• Journal of the Korean earth science society
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• v.42 no.2
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• pp.149-163
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• 2021

In this study, the changes in ozone (O3) concentrations due to the removal of power plant emissions were analyzed using a community multi-scale air quality (CMAQ) model. Two different CMAQ model simulations, one considering the emissions from the Hadong power plant and one without considering the emissions, were conducted to investigate the effect of the emissions on the changes in the O3 concentrations in the surrounding areas. Subsequently, the CMAQ simulations exhibited an increase in the O3 concentration (25.24%) despite a decrease in the NOx (-18.87%) and volatile organic carbon (VOC, -11.27%) concentrations, which are major O3 precursors. The changes in the NO and O3 concentrations due to the removal of power plant emissions presented a strong negative correlation (r= -0.72). This indicated that the increase in the O3 concentration was mainly attributed to the significantly decreased NO concentration, thus, mitigating the O3 titration reaction (NO+O3→NO2+O2). Additionally, due to the VOC-limited (i.e., NOx-saturated) conditions in the study region, NO affected the O3 concentration, indicating that the O3 concentrations in a particular region are not only proportional to the increase or decrease in emissions. Therefore, an in-depth understanding of the chemical O3 production and loss in a particular region is necessary to accurately evaluate the effect of emission control on the changes in the O3 concentration.

• Journal of Korean Society for Atmospheric Environment
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• v.23 no.6
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• pp.727-733
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• 2007

In this study, a newly developed biotrickling system, combined with a non-thermal plasma reactor, was investigated to effectively treat gaseous contaminants such as VOCs (Volatile Organic Compounds). Three kinds of non-thermal plasmas (NTPs) such as a rod type dielectric barrier discharge (DBD) plasma, a packed bead type DBD plasma and a gliding arc (GA) plasma, were tested and compared in terms of power consumption. The rod type DBD plasma was selected as one for integration with biotrickling system due to its relatively high VOC removal efficiency, low power consumption and low pressure drop. Toluene and xylene as representatives of VOCs were used as test gases. The experiment results showed that the efficiency of biotrickling system was especially very low at the high gas concentration and high flow rate and the removal efficiencies of VOCs were considerably enhanced in the biotrickling system, when the DBD plasma was worked in front of that even at the high gas concentration and high flow rate.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2002.05a
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• pp.69-72
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• 2002

저발열량 가스(LCVG : low calorific value gases)는 석탄 가스, coke oven gas, carbon black waste gas, 화학공정 폐가스, 휘발성 유기화합물(VOC) 등 다양하다. 발열량 150~2,000㎉/m$^3$정도의 가스를 말하며 주요 조성은 H$_2$, CO, CH$_4$ 등이다. 화학공정 폐가스나 휘발성 유기물질 배출공정에서는 저농도(LEL 25% 이하)의 유기물질이 주 조성이다.(중략)

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2001.05a
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• pp.119-119
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• 2001

휘발성유기화합물(VOCs)은 음용수의 소독 과정, 자동차 및 공장의 배기가스로부터의 배출 등 다창한 경로를 거쳐 대기 중에 존재하면서 인체에 직접적인 영향을 미치거나, 오존과 같은 물질와 생성에 관여하는 것으로 알려져 있다. 따라서, 이러한 화합물들에 대한 분석 및 관리의 중요성이 증가되면서, VOCs 분석에 필요한 장치의 구성이 절실히 요구되고 있다. (중략)

• Environmental engineer
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• v.24 s.254
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• pp.54-59
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• 2007

본 기술은 각종 산업시설과 환경 기초 시설로부터 대기중으로 배출되는 악취 및 휘발성 유기화합물(Volatile Organic Chemicals; VOC)을 미생물의 분해 작용을 활용하여 제거하는 장치로 오염 물질의 분해과정에서 미생물의 과다생장에 의한 악취 및 휘발성 유기화합물 제거장치의 막힘현상을 미생물 고정화 담체의 교반과 살수과정을 통해 담체표면의 생물막을 효과적으로 제거하는 방법을 이용하여 오염 가스속에 함유되어 있는 악취 및 휘발성 유기화합물을 효율적으로 제거할 수 있는 기술이다. 특히, 미생물 담체의 교반 장치는 미생물 고정화 담체를 교반시켜 생물막을 탈리 시킴으로써 미생물의 생장에 의한 막힘 현상과 이로 인한 압력 손실 증가와 악취 및 휘발성 유기화합물의 제거성능의 저하를 근본적으로 해결할 수 있다.

• The Optical Journal
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• s.130
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• pp.40-41
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• 2010

10년 연속 고객만족도 1위가 말해주듯 철저한 고객서비스를 지향하는 한국후지제록스(대표 정광은, www.fjixerox.co.kr). 우에노 야스아키 사장은 여기에 만족하지 않고 제품에서 서비스로 기업이미지를 새롭게 변화시키겠다고 말한다. 올해 후지제록스 사장으로 부임한 그는 일본과 미국 등 제록스에서만 30여년을 근무한 전형적인 제룩스맨이다. 지난 6월 한국후지제록스에 정식 취임 후 언론과는 처음 만나는 그에게서 취임 후 공격적으로 진행 중인 디지털 인쇄기 사업에 관한 이야기를 들어보았다.

• Proceedings of the SAREK Conference
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• 2005.06a
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• pp.14-14
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• 2005

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2003.05a
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• pp.573-578
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• 2003

본 논문은 산업체에서 발생하는 휘발성 유기물질을 연소하는 직접연소기술에 선회연소 개념을 접목하여 개발된 Cyclonic recuperative thermal oxidation system의 연소성능 실험 결과이다. 기존의 recuperative system의 열효율이 75%로 regenerative thermal oxidation보다 낮아 운전비가 많이 소요되는 단점을 극복하기 위해 기존의 연소실에 cyclone 연소시스템을 적용하여 고효율화 시키고자 하는 것이 핵심이다.(중략)