http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제강전로슬래그를 정석재로 이용한 Struvite 정석반응에 의한 질소와 인의 제거특성
임수빈(Soo Bin Yim) 大韓環境工學會 2010 대한환경공학회지 Vol.32 No.9
제철소에서 산업부산물로 다량 발생되는 제강전로슬래그를 struvite 정석반응의 정석재로 사용하여 고농도의 질소와인의 제거특성을 파악하고자 하였다. NH₄-N와 PO₄-P의 제거 및 회수를 위한 struvite 정석반응의 최적의 pH영역은 8.0~8.75 범위로 확인되었다. pH 8.0~8.75 영역에서 struvite 침전 및 정석반응에 의한 총제거효율은 NH₄-N와 PO₄-P에 대하여 각각 34.3~61.0%와 91.0~96.2%의 값을 나타냈다. Struvite 정석반응에 의한 NH₄-N의 제거는 pH 8.5에서 29.4%의 최대값을 보였고 PO₄-P의 경우 pH 8.0에서 65.1%로 최대값을 나타냈다. 수중의 Ca 이온농도가 증가할수록 struvite 정석반응에 의한 NH₄-N의 제거효율은 감소하는 경향을 나타냈으며 PO₄-P의 경우에는 Ca 이온농도의 변화에 총제거효율이 크게 변하지 않았다. SEM, EDS 및 XRD 분석결과 struvite 정석반응에서 NH₄-N과 PO₄-P의 제거는 MAP과 HAp 결정이 독립적으로 혹은 정석재의 표면상에 발생함으로써 진행되는 것으로 판단되었다. This study investigated the removal characteristics of highly concentrated NH₄-N and PO₄-P by struvite crystallization using converter slag as a seed crystal. The optimal pH range for removal and recovery of NH₄-N and PO₄-P by struvite crystallization was measured to be 8.0~8.75, in which total removal efficiencies for NH₄-N and PO₄-P by struvite precipitation and crystallization were 34.3~61.0% and 91.0~96.2%, respectively. The maximum removal efficiencies for NH₄-N and PO₄-P by struvite crystallization were 29.4% at pH 8.5 and 65.1% at pH 8.0, respectively. The removal efficiency of NH₄-N by struvite crystallization decreased with increasing calcium ion concentration. The analysis results of SEM, EDS and XRD exhibited that NH₄-N and PO₄-P in meta-stable region of struvite crystallization could be eliminated through formation of magnesium ammonia phosphate (MAP) and hydroxyapatite (HAp) on seed crystals by struvite precipitation and crystallization.
좌심방-대퇴동맥 우회술을 이용한 흉부 및 흉복부 대동맥류 수술에 관한 임상적 고찰 -7례 보고-
임수빈,안혁,노준량,Yim, Soo-Bin,Ahn, Hyuk,Rho, Joon-Ryang 대한흉부심장혈관외과학회 1994 Journal of Chest Surgery (J Chest Surg) Vol.27 No.4
Cross-clamping of the descending thoracic aorta results in proximal hypertension,increase in left ventricular afterload,and impairment of distal organ perfusion. Bypass of the descending thoracic aorta is frequently advocated as an adjunct for repair of traumatic tears and degenerative aneurysms. Many methods of bypass have been proposed to provide distal perfusion and reduce left ventricular afterload during cross-clamping of the thoracic aorta. At Seoul National University Hospital, 7 patients were treated for the thoracic or thoracoabdominal aortic aneurysm using left atrium-femoral artery bypass with Bio-medicus centrifugal pump between October,1989, and January,1993. There were atherosclerotic thoracic aneurysm in 3 cases, thoracoabdominal aortic aneurysm due to chronic aortic dissection in 3 cases,aortic rupture due to trauma in 1 case. Total of 7 patients were operated by graft replacement with reimplantation of important branches. None of these cases developed severe complications and hospital death. We believe that the Bio-Medicus centrifugal pump is a simple and safe means of perfusing the lower body, kidneys, and spinal cord without necessitating heparinization.
컬럼반응조 내 충진된 다공성 zeolite-slag 세라믹에 의한 산성광산배수의 처리특성
임수빈 ( Soo-bin Yim ) 한국수처리학회 2018 한국수처리학회지 Vol.26 No.5
The objective of this research is to investigate the removal characteristics of heavy metals and sulfate ion from acid mine drainage (AMD) in a column reactor system by spherical-type porous zeolite-slag ceramics (ZS ceramics). The hydraulic retention time (HRT) condition of 24 hours in the column reactor system was found to more efficiently treat the AMD than that of 12 hours. The increment of mixing amount of converter slag in porous ZS ceramics from 1:1(Z:S) to 1:3(Z:S) was observed to enhance the removal efficiency of Cu, Cd, Mn, and Zn by 13.4%, 32.6%, 22.0%, and 48.2%, respectively. In addition, the 1:3(Z:S) porous ZS ceramics increased the alkali-supply capacity and average cycling period of back-washing relative to 1:1(Z:S) porous ZS ceramics. The average removal efficiencies of heavy metals and sulfate ion from AMD by the 1:3(Z:S) porous ZS ceramics in the column reactor under the HRT condition of 24 hours were Al 97.2%, As 98.3%, Cd 89.9%, Cu 95.5%, Fe 99.5%, Mn 76.0%, Pb 97.5%, Zn 73.2%, and SO4 2- 75.9% during 71 days of operation time. The experimental results exhibited that the porous ZS ceramics in the column reactor system could function as an efficient media for the long-term treatment of heavy metals and sulfate ion from AMD.
정석탈인법에서의 (晶析脫燐法) 정석재특성에 관한 비교 연구
김응호,임수빈 ( Eoung Ho Kim,Soo Bin Yim ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.2
The characteristics of optimum seed crystals for phosphorus removal have been studied comparatively by a column reactor for the leaching test and the phosphorus removal test by crystallization. As seed materials, phosphorus rock, electron arc furnace slag, blast furnace slag and converter slag have been chosen. The converter slag shows the most leaching quantity of Ca^(2+) and OH ion among the above slags. The average phosphorus removal efficiencies of phosphorus rock, electron arc furnace slag, blast furnace slag and converter slag are 35.9%, 74.2%, 99.1%, 94.5% under 20, l7, 24 and 158 days water flowing condition, respectively. X-ray diffraction pattern shows that blast furnace slag and converter slag transform from amorphous to crystalline phase. The SEM observation reveals that the finely distributed cubical crystalline are formed on the surface of converter slag during the crystallization period. The composition ratio (=Ca/P) of crystalline analyzed by EDS mapping is found to be 1.97 which is determined to be hydroxyapatite. By comparing the 4 seed crystals in technical and economical aspects, it is concluded that the converter slag is the best seed material for phosphorus crystallization process.