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배우근,심호재,최동호,황병호,신응배 한국지질과학협의회 2002 Geosciences Journal Vol.6 No.1
Hieltjes, A.H.M. and Lijklema, L., 1980, Fractionation of inorganicphosphates in calcareous sediments. Journal of EnvironmentalQuality, 9, 405-407.Holdren Jr., G.C. and Armstrong, D.E., 1980, Factors affecting phos-phorus release from intact lake sediment cores. EnvironmentalScience and Technology, 14, 142-146.John, F., 1976, Phosphorus release and sorption by lake Mohegansediments. Journal of Environmental Engineering, 102, 873-880.Korean Marine Standard Method, 198, Ministry of Maritime Affairs& Fisheries, Korean, 317 p.Salomons, W. and Forstner, U., 1991, Metals in the Hydrocycle.Springer-Verlag, New York, 215 p.Manuscript received November 20, 2001Manuscript accepted March 1, 2002
권기욱,배우근,오주현,심호재 대한토목학회 2015 KSCE Journal of Civil Engineering Vol.19 No.3
Removal of TCE by Biological Powdered Activated Carbon (BPAC), inoculated with Burkholderia vietnamiensis G4 and fed withtoluene as the growth substrate, was investigated in fed-batch mode reactors, focusing on the regeneration of Powdered ActivatedCarbon (PAC). Cell-only and PAC-only reactors were operated in parallel for comparison. BPAC, once acclimated, removed tolueneand TCE faster than cell-only or PAC-only reactors, leaving the lowest residuals in the liquid. This was amplified when the substratedose was elevated. Toluene competitively adsorbed into the BPAC, resulting in TCE desorption, which accelerated bioregenerationof the TCE-sorbed BPAC. The regenerated BPAC exerted a similar adsorption capacity to PAC and a similar biodegradationcapability to virgin BPAC under the experimental conditions. An acclimation of cells on TCE was necessary before its degradation,which indicated that TCE cometabolism may not be a fortuitous reaction. When a bioactive zone is constructed with BPAC, it isexpected that TCE in the groundwater will be adsorbed to the BPAC; then, the adsorbed TCE will be desorbed and cometabolizedupon pulse injections of toluene. A portion of left-over toluene will be stored in the BPAC and utilized for later TCEcometabolization.
나노배선구조에서의 박막공정의 새로운 모니터링 접근 방법
표성규,최은미,최은화,심호재,고원 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Lightweight-miniaturized devices which can surpass the Moore’s Law with multi-functional high performance have been required due to the advent of high-information era and rapid enhancement of state-of-art technology along with the evolution of electronics industry. However, miniaturizing devices within currently allowed area has been facing adversity of physical limits, such as lithography constraints, channel length scaling, degrading process variations, and lithography constraints as well as highly-priced fabrication process. In order to overcome, developing new materials is necessary in order for scaling down has been required. Nano-carbon semiconductors based upon grapheme lines and vertical carbon nanotube (CNT) interconnection have been paid attention as one of the most efficient countermeasures for solving such disadvantages. In this study, we will discuss 5 nm Interconnects and carbon based semiconductor.
하ㆍ폐수 고도처리를 위한 다기능의 질소원 분해능 균주의 분리
이진용,김진수,공성호,심호재,이상섭 한국미생물학회 2003 미생물학회지 Vol.39 No.1
한국 경기도 일대의 하천으로부터 90 균주의 광합성 박테리아를 순수 분리ㆍ동정하였다. 이들중 고효율의 질소($NH_3$-N, $NO_{3{^{-}$-N)제거능을 가진 균주들을 다양한 조건(명처-혐기, 호기: 암처-혐기, 호기)하에서 선별하였다. $NH_3$-N은 위의 4가지 조건하에서 모든 균주가 제거하였고, 평균 제거율은 호기조건(83.8%)에서 혐기조건(75.1%)보다 약간 높게 나타났다. NH$_3$-N의 감소에 따른 $NH_3$-N증가는 일어나지 않았다. $NO_{3{^{-}$-N은 혐기조건에서 소수의 특정 균주에 의해 제거되었다. 명처-혐기조건에서 다양한 CODcr (mg/L)/biomass (mg/L)에 따른 실험 결과는 CODcr (mg/L)/biomass (mg/L)0.2에서 유기물(98.2%)과 $NH_3$-N(89.0%)의 제거율이 가장 높게 나타났다. 명처-혐기조건에서 다양한 C/N 비율에 따른 실험 결과는, 높은 C/N비 뿐만 아니라 낮은 C/N비(5:1)에서도 $NH_3$-N의 효과적인 제거율(75.8%)을 확인 할 수 있었으며, 또한 $NO_{3{^{-}$-N (96.0%)의 동시적 제거를 확인할 수 있었다. Ninety strains of photosynthetic bacteria were isolated from a local stream at Kyonggi-do, Korea and were further screened. Using these isolated strains, experiments were performed under various light and oxygen conditions in order to select strains with high nitrogen $(NH_3-N,\; NO_3^--N)$ removal efficiencies. Results showed that all the strains screened removed $NH_3-N$, the light had no effect on nitrogen removal, and the nitrogen removal rate was higher aerobically than anaerobically. The removal of $NO_3^--N$ was showed up to 35.3% in some specific strains. Results of batch experiments using Rhodocyclus gelatinosus, an isolated strain with a superior removal rate of $NH_3--N$ and $NH_3-N$, under the anaerobic condition, showed that the removal rate of organics and $NH_3-N$ was the highest (98.2 and 89.0%, respectively) at the CODcr (mg/L)/biomass (mg/L) ratio of 0.2, and the $NH_3-N$ concentration did not increase with the decreasing $NH_3-N$ concentration. Experimental results from various C/N ratios confirmed that the effective removal rate (75.8%) of $NH_3-N$ occurred even at the low (5:1) C/N ratio as well as high ratios, and the simulataneous removal of $NO_3^--N$ (96.0%).