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이민형(Minhyeong Lee),최영균(Younggyun Choi),독고석(Seok Dockko),최의소(Euiso Choi) 적정기술학회 2015 적정기술학회지(Journal of Appropriate Technology) Vol.1 No.1
제철소 열간압연 공정에서 발생하는 밀스케일(mill scale)을 간단한 전처리 과정만 거친 뒤 As(V) 흡착제로서 활용해 보고자 하였다. 밀스케일의 주요 구성성분은 magnetite(Fe 3 O 4 ), hematite(Fe 2 O 3 ), wustite(FeO)의 산화철이었으며, wustite의 함량이 가장 높은 것으로 나타났다. 밀스케일을 이용하여 As(V)에 대한 흡착실험을 수행한 결과, 밀스케일 첨가량이 높을수록, 그리고 밀스케일 입자의 크기가 작을수록 흡착능(mgAs/g)이 크게 증가하는 것으로 확인되었다. 또한 밀스케일의 As(V) 흡착용량은 0.1-0.4 mgAs/g 정도인 것으로 확인되었다. In this study, we applied mill scale particles as a cost-effective adsorbent for As (V) removal. The mill scale taken from a nearby iron & steel company was went through the pretreatment procedure (rinsing with 0.1 N NaOH solution and cleaning with DI water) in order to remove oil and grease. From the XRD analysis, the major components of the mill scale turned out to be magnetite, hematite and wustite. In order to analyze the As adsorption characteristics, batch tests with mill scale particles have been carried out. Mill scale dosage and particle size range seriously affected the As adsorption behavior. The As (V) adsorption capacity was estimated to be 0.1-0.4 mgAs/g-mill scale.
박재홍,최의소,공동수 한국물환경학회 2005 한국물환경학회지 Vol.21 No.2
Understanding the condition of our nation's water resources, identifying what caused problems, and determining how to solve these problems are essential but difficult undertakings. The natural water cycle is itself intricate, and the addition of human activities increased this complexity. Consequently, answering the basic question "How clean and safe is our water?" is not easy. One way to present the condition of our water resources and the impacts of related human activities is to develop understandable measures, or indicators, that singly or in combination provide information on water quality. Managers and scientists can then use this information to develop effective solutions and make sound decisions to protect our water resources. It is important to note that environmental indicators can be used to measure a variety of phenomena. Indicators can present information on status or trends in the state of the environment, can measure pressures or stressors that degrade environmental quality, and can evaluate society's responses aimed at improving environmental conditions.