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하절기 아파트 단지의 공간구성에 따른 외부 열환경 측정분석
박병용(Park Beung-Yong),남중우(Nam Jung-Woo),문미라(Moon Mi-Ra),김태연(Kim Tae-Yeon),이승복(Leigh Seung-Bok) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
High-rise and high density in building has recently caused the problem of Urban Heat Island. For that reason, Bioclimatology is recently becoming more important as it is known that urban climate impacts human activity largely. The purpose of this study is to analyze the external environment considering in apartment space. The green tree and water space arrangement reduces the heat island effect, besides climate comfort zone. This study focused on measuring and analyzing outdoor air temperature, humidity, wind velocity in apartment complex according to the space features. Finally The temperature reduction effects were similar to green space and water space.
MOCVD 더스트 합성용액으로부터 D2EHPA를 이용한 In의 선택적 용매추출
임병용,이찬기,박재량,박경수,심종길,박정진,Im, Byoungyong,Swain, Basudev,Lee, Chan Gi,Park, Jae Layng,Park, Kyung-Soo,Shim, Jong-Gil,Park, Jeung-Jin 한국자원리싸이클링학회 2015 資源 리싸이클링 Vol.24 No.5
In, Ga, Fe, Al이 함유되어 있는 혼합용액으로부터 In을 분리하기 위해 D2EHPA를 이용한 용매추출 연구를 수행하였으며, In의 추출에 대한 수상의 HCl 및 추출제 농도 효과를 확인하였다. In과 Ga의 추출률은 HCl 농도의 감소에 따라 증가하였지만, Fe와 Al의 추출률에는 큰 영향을 미치지 않았다. In과 Ga의 분리인자($D_{In}/D_{Ga}$)는 1.0 M D2EHPA, 0.5 M HCl조건에서 115로 나타났다. 즉, D2EHPA는 혼합용액으로부터 In을 분리하는 추출제로 적합하며, 추출률 및 분리인자는 HCl 및 추출제의 농도 조절을 이용하여 조절할 수 있다. The separation of In from the synthesis solution with Ga, Fe, and Al has been studied by the solvent extraction using D2EHPA as an extractant. The effects as a function of the concentration of extractant and HCl on the extraction of In were investigated. The extraction of In and Ga increased with decreasing HCl concentration, but that of Fe and Al was independent. Separation factor between In and Ga of 115 was obtained at 1.0 M D2EHPA in the presence of 0.5 M HCl of feed solution. Consequently, this study shows that D2EHPA is suitable extractant for In extraction from the synthesis solution. Extraction efficiency and separation factor could be increased by controlling HCl and extractant concentration.