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비틀대모자반 , Sargassum sagamianum 을 이용한 Pb 및 Cr 생체흡착 및 회수
서근학(Kuen hack Suh),안갑환(Kab Hwan Ahn),이학성(Hack Sung Lee),이회근(Hwae Geon Lee),조진구(Jin Koo Cho),홍용기(Yong Ki Hong) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.4
Biosorption of Pb and Cr to Sargassum sagamianum was evaluated in the various conditions. An adsorption equilibrium was reached in about 15 min. for Pb and Cr. The uptake capacity was 224.5 ㎎ Pb/g biomass and 77.5 ㎎ Cr/g biomass, respectively. The adsorption parameters for Pb and Cr were determined according to Langmuir and Freundlich model. Biosorption of Pb and Cr was increased with an increase in pH value. Pb and Cr adsorbed by S. sagamianum could be recovered by desorption process with 0.1M HCl, 0.1M HNO₃ and 0.1M EDTA and the efficiency of Pb desorption was above 90%, whereas the efficiency of Cr desorption was below 51%.
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이회근,이석희,한정호 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2
The objectives of this research were to obtain mass transfer data of the fatty acid extraction from garlic particles with supercritical carbom dioxide and to investigate the characteristics of the fatty acid extracted at different pressures, temperatures and particle sizes. At the range of 8MPa∼ 16MPa and 30℃∼ 35℃, extraction amount of the fatty oil was high The fatty oil analysis showed various fatty acids, in order of decreasing amount,such as linoleic acid, palmitic acid, oleic acid, linolenic acid and stearic acid. This syudy indicated that the extraction amount and the components of the fatty acids were highly dependent upon the temperature and pressure of the supercritical extraction system.
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Alkyl - β - Diketone 에 의한 구리의 추출평형
이상훈,김정희,신정호,정갑섭,이회근 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.2
금속의 용매추출에 대한 알킬 β-diketone의 추출제로서의 특성을 검토하기 위하여 2종의 diketone을 합성하고, 클로로포름 용매하에 구리의 용매추출 실험으로부터 추출 평형특성을 고찰하였다. Diketone의 상간 분배계수와 수용액상에서의 해리상수, diketone과 구리간 킬레이트의 안정도 상수, 추출 분배계수 및 추출 평형상수 등을 흡광도법으로 구하고, 수종의 알킬 β-diketone의 탄소연쇄 길이에 따른 추출 관련상수들의 특성을 비교하였다. 추출 평형식은 추출종이 (CuR₂)￣형인 Cu^(2+)+2(HR)￣=(CuR₂)￣+2H^+로 표시되었으며, β-diketone의 탄소연쇄가 길수록 분배계수와 해리상수는 감소하나 킬레이트의 안정도 상수 및 추출 분배계수 등은 증가하였다. Two kinds of alkyl β-diketones were synthesized from ketone and ester with sodium amide. The characteristics of extraction equilibria of copper by β-diketones diluted with chloroform were investigated. The dissociation constant and the distribution coefficient of β-diketones were determined by spectrophotometric measurements. The stability constant and the distribution coefficient of copper complex, and the equilibrium constant in the extraction of copper were also determined. The extracted species of copper complex was found to be (CuR₂)￣ with the equilibrium reaction of Cu^(2+) +2(HR)￣=(CuR₂)￣+2H^+. With increasing the length of carbon chain of alkyl β-diketones, the dissociation constant and the distribution coefficient of β-diketones were decreased, while the stability constant and the distribution coefficient of copper complex increased.
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서근학,이회근,김병진,조문철,안수현,조재윤 한국환경과학회 1998 한국환경과학회지 Vol.7 No.1
The feasibility of foam separation to remove protein in aquacultural recirculating water was investigated. From the results of batch foam separation on protein removal, superficial air velocity and initial protein concentration in bulk solution were found to be important operational factors in determining removal rates of protein. The protein removal rate by batch foam separation was proportionally increased with the superficial air velocity. Performance characteristics of continous foam separator were highly dependent upon the operating parameters of superficial air velocity, hydraulic retention time(HRT) and foam height. Removal efficiency of protein increases with increasing superficial air velocity and HRT, and independent on foam height. As DO concentration was increased with superficial air velocity, foam separator is also used for oxygen addition. It could be confirmed that foam separator might offer better perspective for protein removal in aquacultural recirculating water
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