경상분지내 동광상 관련 진동화강암류에 대한 지화학적 연구

이재영,이진국,박법정,이인호,김상욱,Lee, Jae Yeong,Lee, Jin Kook,Park, Beob Jeong,Lee, In Ho,Kim, Sang Wook 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.2

Jindong Granites are plotted mainly in the region of granodiorite~diorite of the Streckeisen's diagram, while Yucheon-Eonyang Granites and Onjonri Granites in the region of monzo-granite and monzo-granite~granodiorite, respectively. Jindong Granites show a differenciation trend of calc-alkaline magma, and its magmatic evolution from intermediate to acidic rocks, which might form mineralizing solution, is consistant with the general path of the Cretaceous granitic rocks including Yucheon-Eonyang Granites and Onjongri Granites. The differenciation index (D.I.) is 35~80 for Jindong Granites, which is lower than 85~95 of Yucheon-Eonyang Granites and is partly overlapped by 67~84 of Onjongri Granites. There is clear difference in content of some major and trace elements between Jindong Granites of Cu province and the other granitic rocks of Pb-Zn and Mo provinces. Between these metallogenic provicnes, Cu content is high in Jindong Granites near Haman-Gunbuk mineralized zone, while Pb and Zn are relatively abundant in Yucheon-Eonyang Granites and Mo in Onjongri Granites. Therefore, Jindong Granites of the Cu province are distinguishable by chemical compositions and their related geochemical characteristics from the other Cretaceous granitic rocks of Pb-Zn and Mo provinces. However, the content of Cu and Cl in biotite is applicable to distinguish a productive phase from a barren phase of Jindong Granites, because Cu and Cl show a trend to be concentrated in biotite of Jindong Gratites in the Haman-Gunbuk mineralized zone.

경상분지내 열수광상의 광화작용과 백악기 화강암류의 화학성분 변화와의 관계

이재영,이진국,이인호,김상욱,Lee, Jae Yeong,Lee, Jin Kook,Lee, In Ho,Kim, Sang Wook 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.4

The Cretaceous granitic rocks show differences in rock types and chemical compositions according to metallogenic provinces of copper, lead zinc and molybdenum in the Gyeongsang basin. Jindong granites are of granodiorite~quartz diorite~diorite in Cu-province; Makeunsan/Yucheon-Eonyang granites, granodiorite~granite in Pb Zn-province; Onjeongri-Yeonghae granites, granodiorite~quartz diorite in Mo-province, and there is a trend that productive masses are less differenciated than barren masses in Cu and Pb-Zn provinces whereas productive masses are more differenciated than barren masses in Mo province. Metallogenic provinces are distinguishable by variations of major and trace elements. The Cretaceous granitic rocks are highest in the content of Ca, Mg and other basic major elements and lowest in the content of K and Na in Cu provicne; the variation trends are vice versa in Pb-Zn province. Trace elements such as Rb and Sr show variations related to K and Ca, and metallogenic provinces are also distinguishable by their ratios. The granitic rocks of Mo province have intermediate content of major and trace elements, but are clearly distinguishable from Jindong granites and partly overlapped by Yucheon-Eonyang granites. Chlorine content in biotites is higher in a productive mass than in a barren mass in Cu province. Therefore, the mineralogical and chemical compositions are applicable as geochemical index to distinguish the types of mineralizaion, and productive and barren masses of the Cretaceous granitic rocks in the Gyeongsang basin.

경북지역 폐금속광산이 환경에 미치는 영향

이재영,김종근,이인호,이진국,Lee, Jae Yeong,Kim, Jong Gun,Lee, In Ho,Lee, Jin Kook 대한자원환경지질학회 1993 자원환경지질 Vol.26 No.4

The heavy metal contents are more abundant in stream waters, paddy soils and rice plants in the vicinity of abandoned mines compared to the surrounding areas in the Kyungpook province. However, these contents tend to decrease with distance from mines, and show some variation under different geological and geochemical environments. The Sin-stream waters have high contents of Cu=4.9 ppm, Pb=0.1 ppm, Zn=3.5 ppm and other heavy metals (Ni, Co, Cd) at Dalsung abandoned mine and low contents of Cu=0.4 ppm, Pb=0.1 ppm, Zn=0.1 ppm and other metals= 0.002 ppm in the surrounding area. The high contents decrease in the downstream in the area of calcareous sedimentary rocks. The paddy soils have high contents of approximately Cu=51 ppm, Pb=83 ppm, Zn=211 ppm, and Cd=11.3 ppm in the vicinity of Gunwi abandoned mine but low contents of Cu=4.5 ppm, Pb=2.9 ppm, Zn=60 ppm and Cd=0.4 ppm in the surrounding area. The Dadeog abandoned mine also shows similar trends to Gunwi mine. The contents of heavy metals of rice plants are high in the roots but trends to decrease through stem+leaf and become low in brown rices.

금속폐광산주변의 토양, 식물 및 하천의 중금속오염에 대한 지화학적 연구 -달성 및 경산광산-

이재영,이인호,이순영,Lee, Jae Yeong,Lee, In Ho,Lee, Sun Yeong 대한자원환경지질학회 1996 자원환경지질 Vol.29 No.5

The tonnage of copper and tungsten produced at Dalseong mine by Taehan Tungsten Mining Company from 1961 to 1971 was 48,704 tons (M/T) of 4 wt.% Cu and 1,620 tons (S/T) of 70wt.% WO, but the mine was closed in 1974. Kyeongsan mine is a small abandoned cobalt mine with no data of production. To investigate the pollution level of the mine areas, soils, plants (Ohwi and Pampanini), stream waters and stream sediments were taken and Fe, Mn, Cu, Pb, Zn, Ni, Co, Cd and Cr were analysed by ICP. Soils are considerably contaminated by the heavy metals related to ore deposits, The heavy metal contents in plants vary with the species and parts of plants. Stream waters are anomalously high in heavy metals in the vicinity of the mines but the contents decrease downstream in the process of dilution and precipiation. However, heavy metal contents increase very high in stream sediments due to precipiation. To protect environmental damages caused by acid mine drainages wetlands must be constructed outside pits, and it is necessary to fill pits with waters, limestone chips and organic materials, which give reducing and alkaline condition to ores. Under the condition pyrite is protected from oxidation and aqueous iron sulphates precipitate to form stable secondary pyrite.

천연 벤토나이트로부터 합성된 제올라이트 A의 특성

이재영,조승래,이홍기,심미자,이주성,김상욱,Lee, Jae-Yeong,Jo, Seung-Rae,Lee, Hong-Gi,Sim, Mi-Ja,Lee, Ju-Seong,Kim, Sang-Uk 한국재료학회 1995 한국재료학회지 Vol.5 No.8

경북 감포지역에서 산출되는 천연 벤토나이트를 이용하여 제올라이트를 합성하였으며 세제용 builder로서 가능성을 연구하였다. 최적의 합성조건은 기질의 몰비가 SiO$_2$/Al$_2$O$_3$=2, $Na_2$O$_3$/Al$_2$O$_3$=1, $H_2O$/A1$_2$O$_3$=30이고 9$0^{\circ}C$에서 3시간 반응시킬 경우였고, 이 조건에서는 A형 제올라이트가 합성되는 것을 XRD를 통하여 확인하였다. 최적 조건에서 합성된 제올라이트의 이온교환능을 측정하기 위하여 경도 40$^{\circ}$Dh의 CaCl$_2$용액과 3$0^{\circ}C$에서 IS분 접촉시킨 결과 264.9mg CaO/g-zeolite 정도로 우수한 값을 나타내었다. 이 시료의 백색도는 89%이었고, 평균 입자크기는 9.95$\mu\textrm{m}$이었다. Synthetic zeolite was prepared by using of natural bentonite from Kampo area and the application of detergent builder was investigated. The optimum synthetic condition was SiO$_2$/Al$_2$O$_3$= 2, Na$_2$O/A1$_2$O$_3$=1, H$_2$O/A1$_2$O$_3$=30 at 90$^{\circ}C$ for 3hr and it was found by XRD analysis that the zeolite synthesized under this condition was type A. When the zeolite A synthesized under the optimum condition was contacted with 40$^{\circ}$Dh CaCl$_2$solution at 30$^{\circ}C$ for 15min, the cation exchange capacity was 264.9mg CaO/g-zeolite. And the whiteness of the sample was 89% and the mean particle size was 9.95$\mu\textrm{m}$.

실란 결합제 처리된 에폭시 수지 복합재료의 계면 특성

이재영,이홍기,심미자,김상욱,Lee, Jae-Yeong,Lee, Hong-Gi,Sim, Mi-Ja,Kim, Sang-Uk 한국재료학회 2001 한국재료학회지 Vol.11 No.12

The effects of coupling agent on the interface characteristics between epoxy resin and natural zeolite were studied by SEM, optical microscope and universal testing machine (UTM). Epoxy resin as a matrix was diglycidyl ether of bisphenol A (DGEBA)/4,4'-methylene dianiline (MDA)/malononitrile (MN) system and natural zeolite as an inorganic fillet was produced in Korea. With the increment of zeolite content, tensile strength decreased and it was due to the different elastic moduli of two materials. When external stress was loaded on the composites, the stress concentrated on the weakly bonded interface and crack grew easily. To improve the interface characteristics, the surface of the natural zeolite was treated with the silane coupling agent and it was found that the tensile strength was increased. The morphology of the interface showed that the bonding characteristics were modified by coupling agent.

등온적 DSC 분석에 의한 Epoxy / CTBN 계의 경화반응

이재영,박장호,심미자,김상욱 ( J . Y . Lee,J . H . Park,M . J . Shim,S . W . Kim ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.2

시나리오 기반 하천-제내지 연계 통합수리해석에 의한 홍수위험도 산정

이재영,남명준,권현한,김기영,Lee, Jae Young,Nam, Myeong Jun,Kwon, Hyun Han,Kim, Ki Young 한국수자원학회 2016 한국수자원학회논문집 Vol.49 No.9

본 연구에서는 시나리오 기반의 홍수위험도를 산정하기 위해 하천-제내지 통합수리 해석모형이 적용되었다. 적용대상 유역으로 낙동강 및 금호강이 위치한 대구 성서공단 인근을 선정하여 하천홍수 발생으로 인한 시간별 범람수심 및 범람유속을 산정하였다. 하천-제내지 통합수리해석에 의한 2차원 범람해석은 100년/200년 빈도 신뢰구간 상한치(97.5%)에 의한 제방월류 시나리오와 100년/200년 빈도 신뢰구간 평균치(50%)에 의한 파제 시나리오로 구성하여 수행되었다. 또한 제내지 범람에 의한 위험도 산정을 위해 2차원 홍수범람도로부터 예측된 각 절점에 대한 최대 침수심 및 유속에 대한 정보를 이용하여 등급화를 실시하였다. 본 연구결과는 제방월류 및 파제에 따른 제내지의 비상대처계획(EAP) 수립에 정량적인 근거자료로 제시하는데 매우 유용할 것으로 사료된다. A coupled river-overland hydrodynamic model was applied to estimate flood risk by a scenario-based approach. The study area is Seongseo Industrial Complex in Daegu which is located near Nakdong river and Geumho river. Inundation depth and velocity at each time were calculated by applying a coupled 1D/2D hydrodynamic model to the target area of interest. The 2D inundation analysis for river and overland domain was performed with the scenario-based approach that there are levee overflow against 100/200 year high quantile (97.5%) design flood and levee break against 100/200 year normal quantile (50%) design flood. The level of flood risk was displayed for resident/industrial area using information about maximum depth and velocity of each node computed from the 2D inundation map. The research outcome would be very useful in establishing specified emergency action plans (EAP) in case of levee break and overflowing resulting from a flood.

DGEBA/MDA계의 인장 및 충격 특성에 미치는 PGE-AcAm의 영향

이재영,심미자,김상욱,Lee, Jae-Yeong,Sim, Mi-Ja,Kim, Sang-Uk 한국재료학회 1997 한국재료학회지 Vol.7 No.6

에폭시 수지 계의 경화반응 속도를 증가시키고 기계적 물성을 향상시키기 위해 합성 pheny1 glycidy1 ether(PGE)-acetamide(AcAm)를 diglycidy1 ether of bispenol A(DGEBA)/4,4'-methylene dianiline(MDA)계에 도입하였다. PGE와 AcAm을 2:1의 몰비로 혼합한 후 18$0^{\circ}C$에서 1시간 반응시켜서 PGE-AcAm을 합성하였다. 5phr의 PGE-AcAm이 첨가되었을 때 인장강도가 15% 개선되었으며, 그 이후로는 PGE-AcAm을 합성하였다. 5phr의 PGE-AcAm이 첨가되었을 때 인장강도가 15% 개선되었으며, 그 이후로는 PGE-AcAm의 함량에 관계없이 거의 비슷한 값을 나타내었다. 반면에유리전이 온도(Tg)와 충격강도는 PGE-AcAm의 함량이 증가함에 따라 감소하였다. 파단면은 PGE-AcAm이 첨가됨으로써 더 복잡한 형상을 나타내었다.

철도의 탄소중립 추진전략 국외 사례

이재영,김경훈,Jae-Young Lee,Kyung-Hoon Kim 한국건설순환자원학회 2023 한국건설순환자원학회지 Vol.18 No.3