• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2003년도 추계학술대회 논문집
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• pp.443-444
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• 2003

The developments on desulfurization have been focused on the application to the advanced power generation systems such as integrated gasification-combined cycle (lGCC) and the gasification-molten carbonate fuel ceil (MCFC). The gas produced from the coal gasification contains H$_2$S and other hazardous sulfur compounds, which must be removed to avoid corrosion and environmental problems. (omitted)

• 한국식품저장유통학회지
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• 제24권8호
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• pp.1094-1102
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• 2017

대구시내 대형마트에서 유통되고 있는 스테인레스, 경질알루미늄, 연질알루미늄 재질 코펠 및 불소수지 코팅 불판에 대해 0.5% citric acid 용액에서 용출되는 유해 금속을 유도결합플라즈마 발광광도측정기(ICP-OES)로 측정한 결과, 식품용 기구 및 용기 포장 공전에 기준이 설정된 납, 카드뮴, 비소, 니켈의 경우는 모두 적합한 것으로 나타났다. 그러나 용출 용액과 사용 환경에 따라 그 용출 정도에 차이가 있는 것으로 나타났다. 증류수, 0.5% citric acid 용액, 1% NaCl 용액 등 용출 용액을 달리하여 30분간 가열한 뒤 평균 용출량을 비교한 결과, 증류수에서 경질알루미늄 재질 코펠의 알루미늄 용출량이 0.007 mg/L 수준이었으나, 0.5% citric acid 용액에서는 스테인레스 재질 코펠은 0.021 mg/L, 경질알루미늄 재질 코펠은 51.97 mg/L, 연질알루미늄 재질 코펠은 24.89 mg/L, 불소수지 코팅 불판은 0.040 mg/L로 증류수와 1% NaCl 용액에서의 용출량보다 높았다. 1% NaCl 용액에서 비소는 스테인레스와 연질알루미늄 재질 코펠 0.006 mg/L, 경질알루미늄 재질 코펠 0.008 mg/L로 증류수와 0.5% citric acid 용액에서의 용출량보다 다소 높게 용출되었다. 0.5% citric acid 용액에서 니켈이 스테인레스 재질 코펠이 0.007 mg/L로 증류수와 1% NaCl 용액에서의 용출량보다 다소 높게 용출되었는데, 이는 스테인레스 코펠의 니켈 조성 특성 때문으로 사료된다. 카드뮴은 모든 용액에서 검출되지 않았다. 물리적 스크래치를 가한 후의 용출 용액에 따른 유해 금속 용출량은 스크래치를 가하기 전보다 모든 용액에서 전반적으로 증가하는 것으로 조사되었다. 특히, 0.5% citric acid 용액에서는 스테인레스와 경질알루미늄 재질 코펠에서 카드뮴이 용출되는 것으로 나타났다. 용출 시간에 따른 유해 금속 용출량 변화를 살펴보면, 증류수에서는 경질알루미늄, 연질알루미늄 재질 코펠과 불소수지 코팅 불판의 알루미늄 용출량이 증가하였다. 0.5% citric acid 용액에서는 스테인레스, 경질알루미늄, 연질알루미늄 재질 코펠의 니켈과 알루미늄 용출량이 증가하였고, 불소수지 코팅 불판은 납, 비소, 알루미늄 용출량이 증가하였다. 1% NaCl 용액에서는 스테인레스, 경질알루미늄 재질 코펠과 불소수지 코팅 불판의 비소 용출량이 증가하였고, 연질알루미늄 재질 코펠의 비소와 알루미늄 용출량이 증가하였다.

• 한국대기환경학회지
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• 제27권5호
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• pp.558-568
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• 2011

Hazardous volatile organic compounds (HVOCs) have been increasingly getting concern in urban air chemistry due to photochemical smog as well as its toxicity or potential hazards. In this study, we investigated their concentrations and the properties in tunnel, urban roadside and residential area. As a result, among 36HVOCs measured in this study, BTEX (benzene, toluene, ethylbenzene, xylene) and dichlorodifluoromethane, 1,2,4-trimethylbenzene, trichlorofluoromethane were detected above the concentration of $1{\mu}g/m^3$ in every sampling site and the most abundant compound was toluene. The other compounds were detected at trace level or below the detection limit. In addition, we found that three CFCs (chlorofluorocarbons), such as CFC-12, CFC-11, CFC-113, were persistently detected because of the emission in the past. Toluene to benzene ratio (T/B) at tunnel and roadside were calculated to be 4.3~5.3 and at residential area 15.4, suggesting that the residential area had several emission sources other than car exhaust. The ratio of X/E (m,p-xylene to ethylbenzene) ratio was calculated to be 1.8~2.1 at tunnel, 1.7 at roadside and 1.2 at residential area, which means this ratio reflected well the relative photochemical reactivity between these compounds. Good correlation between m,p-xylene and ethylbenzene ($r^2$ > 0.85) were shown in every study sites. This indicated that correlation between $C_2$-alkylbenzenes were not severely affected by 3-way catalytic converter. In this study, it was demonstrated that the concentration of benzene was very low, compared with national air quality standard (annual average of $5{\mu}g/m^3$). Its concentration were $2.52{\mu}g/m^3$ in roadside and $1.34{\mu}g/m^3$ in residential area. We thought this was the result of persistent policy implementation including the reduction of benzene content in gasoline enforced on January 1, 2009.

• 디지털융복합연구
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• 제20권5호
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• pp.653-659
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• 2022

본 연구에서는 치과위생사들의 유해화학물질에 대한 인식과 교육의 필요성을 조사하였다. 연구 대상은 2021년 6월부터 8월까지 의료기관에 근무하는 치과위생사 103명을 대상으로 온라인 설문조사를 한 후 SPSS 21.0 프로그램으로 분석하였다. 연구결과 근무경력은 유해화학물질 인식(r=.280, p<.01), 실천(r=.303, p<.01), 인식은 실천(r=.411, p<.01)과 양의 상관관계가 있었다. 유해화학물질 정보는 실천(r=.371, p<.01)과 유의한 양의 상관관계가 있었다. 교육 요구도 조사 결과 유해화학물질 교육 경험은 27.2%에 불과하였으며, 교육 필요 인식은 96.1%로 높게 조사되었다. 교육 희망 방법은 온라인 교육이 49.5%, 교육 희망시간은 1시간이었다. 따라서 치과위생사의 안전한 작업환경을 조성하고 유해화학물질의 안전성을 확보하기 위해서는 대학, 의료기관 및 보수교육 등의 교육기회를 확대하고 온라인 교육을 통한 접근성을 높일 필요가 있었다.

• 한국보건간호학회지
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• 제9권2호
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• pp.104-114
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• 1995

This study was designed to develop preventing occupational disease programme in small-medium scale industries. The intervention was done in 354 enterprises from July to December in 1993 by health personnels in mobile occupational health centers. The summarized results of the above achievements were as follows. 1. Total number of enterprises were 354. Among them $66.9\%$ was under 100 workers, $26.6\%$ was u!1der 200 workers, and $6.5\%$ was belong to over 200 workers. The majority manufactures were non-metallic mineral product industries $(11.3\)$ fabricated metal product industries $(11.0\%)$. and textile industries $(10.7\%)$. 2. In 1993, for 350 enterprises were carried out evaluation of workplace environment. A total of $76.3\%$ industries were found to improper showing higher level of hazardous agent than the TLV. Noise and dust are the typical agent of which levels in workplace were high in most of industries. 3. A total 60 cases $(0.8\%)$ of occupational diseases were detected through physical check-up from 7,394 industrial workers in 1993. Detection rate by hazardous agent was highest among workers in relation to dust, and secondly highest to noise. 4. Through the systematic approach by hazardous agent was increased to the monitoring of work condition and follow up care of occupational disease. In future, there should be development in the scaled check list of preventing occupational disease management.

• 한국의류학회지
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• 제29권6호
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• pp.814-824
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• 2005

This study analyzed and standardized the harmful substances of organic compounds(dioxins) in disposable diapers for infant's clothing. Commercial samples obtained from Korea, Japan, America and German were determined by HRGC/HRMS. Experimental Methods were consisted of comparision of extracting solvent, analysis of PCDD/Fs, and analysis of PCDD/Fs of extraction in disposable diaper. The results were as follows. No high TEQ values in TCDD(1), PCDD(0.5) and HxCDD(0.1) were found for commercial disposable diapers from country Korea, Japan, U.S.A and German. In extraction for 6hrs experiments, HpCDD and OCDD were detected in disposable diapers of U1, U2 and G2, respectively. In extraction fur 24hrs experiments, HpCDD, OCDD and OCDF were detected in disposable diapers of J3, U1, U2 and U3. So we need to set standards of measurement for harmful materials contained in textile goods. This will make a safe and comfortable clothing environment for all users, regardless of age.

• 한국산업보건학회지
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• 제26권1호
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• pp.1-10
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• 2016

Objectives: The aim of this study is to review the results of exposure to chemicals and to extremely low frequency(ELF) magnetic fields generated in wafer fabrication operations in the semiconductor industry. Methods: Exposure assessment studies of silicon wafer fab operations in the semiconductor industry were collected through an extensive literature review of articles reported until the end of 2015. The key words used in the literature search were "semiconductor industry", "wafer fab", "silicon wafer", and "clean room," both singly and in combination. Literature reporting on airborne chemicals and extremely low frequency(ELF) magnetic fields were collected and reviewed. Results and Conclusions: Major airborne hazardous agents assessed were several organic solvents and ethylene glycol ethers from Photolithography, arsenic from ion implantation and extremely low frequency magnetic fields from the overall fabrication processes. Most exposures to chemicals reported were found to be far below permissible exposure limits(PEL) (10% < PEL). Most of these results were from operators who handled processes in a well-controlled environment. In conclusion, we found a lack of results on exposure to hazardous agents, including chemicals and radiation, which are insufficient for use in the estimation of past exposure. The results we reviewed should be applied with great caution to associate chronic health effects.

• 분석과학
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• 제16권6호
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• pp.458-465
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• 2003

수용액 시료 중 휘발성 지방산을 HS (headspace)-SPME (Solid phase microextraction)를 이용하여 간편하고 빠르게 분석하는 방법에 대하여 연구하였다. 1-Pyrenyldiazomethane (PDAM)을 이용한 화이버 내 유도체화를 통하여 휘발성 지방산의 검출감도를 향상시킬 수 있었으며, SPME 추출조건으로 pH, 염 효과 및 초음파 추출에 대하여 조사하였다. 본 연구에서 개발된 방법을 기반으로 실제 폐수 중 휘발성 지방산을 추출하여 기체크로마토그래피/질량분석기-선택이온검색법으로 정량 분석하였다.

• 정보관리연구
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• 제28권2호
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• pp.1-19
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• 1997

본 연구의 목적은 효율적인 해양개발과 이용 및 해양오염방지를 위해서 해양환경보존과 해양오염 방지에 대한 정보를 이용자가 정확하고 쉽게 접근할 수 있도록 하기 위함이며, 날로 증가추세에 있는 유해화학물질 사고의 피해를 최소화하기 위하여 유해화학물질의 특성과 사고발생시 방재 대책 등을 수록한 유해화학물질 특성정보 1,000종을 데이터베이스화하여 연구전산망과 상용망을 통하여 제공하고 있다.

• 한국대기환경학회지
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• 제29권2호
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• pp.163-170
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• 2013

The fine-particles, moisture and variety of hazardous gases are produced during electronic manufacture process. Most of the fine-particles are 0.1~10 ${\mu}m$ in size and the hazardous gases such as HF, $SiH_4$, CO, $NH_3$, etc. seriously affect environment, human's body and manufacturing process. To remove these characterized gases and fine-particles, Water-Cyclone designed and tested for removal efficiency on fine-particles and $NH_3$ under -980Pa negative pressure condition. As a result, under 0.1~1.0 $m^3/min$ flow condition, the efficiency on 5 ${\mu}m$ particles was 80~96%, 10 ${\mu}m$ particles was 86~96%, and 20 ${\mu}m$ particles was 91~99%. Besides, the removal efficiency on soluble gas $NH_3$ was 56.5% at 0.5m3/min and 79.1% at 1.0m3/min under 500 ppm flow concentration and 70.0% at 1.0 $m^3/min$ under 1,000 ppm flow concentration. Therefore, on particles, as the flow rate and particle size increased, the collection efficiency rate was increased. On soluble gas, as the flow rate increased, the removal efficiency was increased under the same concentration.