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- 저자 : 김무늬 ( Munui Kim ) (검색결과 2 건)
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유기견운모 센서를 이용한 As(III) 측정 최적 조건 연구
김무늬 ( Munui Kim ),양재규 ( Jae-kyu Yang ),박연종 ( Youn-jong Park ),이승목 ( Seung-mok Lee ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.3
In this study, the optimum conditions of working electrode with using organo-sericite was evaluated for the determination of As(III). The experimental results indicated that the peak currents of As(III) were increased as the size of sericite powders which were mixed in manufacturing for the organo-sericite electrode was decreased. The currents using polyether ether ketone (PEEK) as a support material for the electrode was considerably enhanced 12 times higher than that of the teflon material. The mixing ratios of raw materials for manufacturing the electrode were varied and the optimum ratio was obtained as the nujoil oil was 1.5 g and the organo-sericite was 15 wt%. Under the obtained optimum conditions, the peak currents were correlated well with the concentration of As(III) and it showed that As(III) levels down to 1 ppb were successfully analyzed. It concluded that the organo-sericite could be applied well to the determination of trace level of As(III) in aqueous solution.
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김무늬 ( Munui Kim ),랄문시아마 ( Lalhmunsiama ),이승목 ( Seung-mok Lee ),진강중 ( Kang-jung Jin ) 한국공업화학회 2017 공업화학 Vol.28 No.5
급격한 도시화와 인구 증가로 인한 건물의 밀폐성 증가로 심각한 실내 공기 오염을 야기하고 있다. 몇몇 실내 공기오염물질 중 페인트에서 방출되는 휘발성 유기화합물(VOCs)이 주요 관심사이다. 따라서 친환경적인 페인트 제품 개발에 대한 요구가 증가하고 있다. 본 연구에서는 점토광물인 견운모를 사용하여 벽마감용 천연페인트를 제조하였다. 소규모 챔버를 사용하여 벽마감용 천연페인트에 존재하는 독성물질 확인 실험을 하였으며, 2개의 상업용 페인트와 비교 분석하였다. 총 VOC 양은 trace로 권장 실내 공기질 기준보다 낮은 것으로 나타났다. 벽마감용 천연페인트에서 톨루엔은 검출되지 않았으며 포름알데히드가 trace 레벨로 측정되었다. 독성지수 분석결과 2가지 친환경 상업용 페인트와 비교하여 본 연구에서 개발된 천연페인트가 낮은 유해물질 방출을 나타내었다. 건축자재등급 실험에서 벽마감용 천연페인트가 1등급으로 분류되었다. 이상의 연구결과에서 나타난 바와 같이 벽마감용 천연페인트의 주성분으로 견운모를 사용하는 것이 실내 공기질을 관리하는데 유용할 것이라 판단된다. Due to the rapid urbanization and increased population, there is an increase in airtight nature of buildings which causes serious indoor air pollution. Among several indoor air pollutants, volatile organic compounds (VOCs) emitted from paint are of major concern. Therefore, there is an urge for the development of environmental friendly paint products. In this wok, a natural wall paint (NWP) was prepared by utilizing a natural clay material “sericite” as a main component. A small chamber test was carried out to identify the toxic substances release from NWP and the results were compared with two eco-friendly commercial paints. The total VOCs were detected in trace level inside the test chamber and their concentrations were below the recommended indoor air quality standards. Toluene was not detected for NWP, whereas formaldehyde was observed in trace level. The toxicity index results were compared with two commercial paints and found that NWP exhibited less harmful gas emission. Based on certification rating of building materials, NWP can be classified as the first grade of building materials. Due to the above advantages, the use of sericite as a major component in NWP will be a useful technique to maintain the indoor air quality.
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