폐주물사를 이용한 중금속이온의 제거에 관한 연구

박진식,장성호,김수생,배계선 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.2

This study was performed to investigate the utilization of waste sand for removal of heavy metal ion in industrial wastewater. The results obtained from this research showed that removal rate of heavy metal ions were excellent in the increase of waste sands amounts except Cr. If we reflected the adsorption capacity(k) and adsorption intensity(l/n) of Freundlich isotherm, we couldn't consider waste sands as a good adsorbent. But we could know that waste sands were capable of removing a part of heavy metal ion.

매립장내 일반 폐기물의 밀도조사에 관한 연구

박진식,장성호,김수생 동아대학교 법학연구소 1999 硏究報告 Vol.22 No.2

The majority of general wastes have been treated by landfill method in Korea and the landfill period of landfill site was influenced by waste's density. The aim of this study was to investigate waste's vehicle charge density and throw down density for plan, design and management of landfill site. Vehicle charge density and throw down density of total waste was 0.375 ton/ ㎥, 0.408 ton/ ㎥, respectively and incinerated ash's density was higher than the others. Difference of density with a day of the week was due to distinction of waste's composition ratio at the time of investigation. Total waste's density was extremely influenced by garbage' density. General waste's vehicle charge density and throw down density carried in SG landfill site(after '97. 9) was assumed 0.299 ton/ ㎥, 0.263 ton/ ㎥ respectively.

굴껍질에 의한 산성폐수 중화능에 관한 연구

박진식,장성호,문추연,성낙창,김수생 동아대학교 환경문제연구소 1995 硏究報告 Vol.18 No.2

This Study has been carried out to evaluate the neutralization ability of waste oyster shelles. The results of this study are summerized as following ; 1. For reactiontime, neutralization effective were investigate smally but pH variations were investigate largely for 10 minutes reactiontime. 2. pH variations with dosage of oyster shelles were small except pH 2 3. Therefore, waste oyster shelles is able to neutralize for acid wastewater.

유온감압법에 의한 슬러지의 탈수에 관한 연구

장성호,박진식,성낙창,김수생 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

This study was to experiment, through sewage sludge treatment by Vacuum Frying Method, the effects of reaction condition come up to sludge water content. The results are as follows 1) On accassion the sewage sludge treatment by Vacuum Frying Method, the effect of pressure come up to water content, the water content decreased when the same reaction temperature and time was lower pressure more than the normal pressure(760㎜Hg), particularly. Since pressure 280㎜Hg increased water content decrease range. Since pressure(250㎜Hg) the water boiling point down sharply a phenomenon and the lower pressure lowered the water boiling point a phenomenon, the same sewage sludge water content evaporated rapidly the lower pressure more than the normal pressure. Accordingly, a close vacuum(40㎜Hg), showed very lower water content when a short reaction temperature and reaction time. 2) On accassion the sewage sludge treatment by vacuum Frying Method, the effect of reaction time come u to sludge water content, at the same reaction pressure and temperature, relatively the water content at a low reaction temperature(90℃, 120℃) decreased small in case of a long reaction time, the water content at a high reaction temperature(150℃, 180℃) decreased rapidly in case of a short reaction time. 3) On accassion the sewage sludge treatment by Vacuum Frying Method, the effect of come up to sludge water content, at the same reaction time and pressure, increase of reaction temperature decreased rapidly the water content.

紡絲工程에서의 Emulsion Fume 處理를 위한 充塡塔 適用에 관한 硏究

최동훈,박진식,장성호,김일배,서정민,김장호 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

This study was carried out to interpret hydraulic behavior and component analysis of the emulsion fume, laboratory work of mass transfer in the packing tower which packed 50mm plastic Hiflow-ring. The results from experiment are as follows : 1. The component of emulsion fume is Cyclododecane, 1-Tridecene, 4-Nonene 5-butyl. The kinds of Alkene contained approxymately 76.23 percent. 2. To compare with conventional packing, 50mm Hiflow-ring could save energy because of low pressure drop under high load. 3. The unique magnituteds of packing witch was used are as follows. Cv = 5.18 × 10^(-4) , m = 0.683, n=0.462 so we can predict efficiency which occurres. 4. To require plant of the packing tower in the gas capacity factor 2.7 (Kg^(1/2) m^(-1/2) s^(1))

石灰石 添加에 따른 二酸化黃 除去率 向上

김영수,박진식,장성호,장부규,서정민,김장호 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.2

This study was carried out to investigate the performance enhancement of forced oxidation operation on the limestone utilization and SO₂ removal efficiency of the pilot flue gas desulfurization system. The results are as follows : 1. The results of the forced oxidation tests have shown that converting from natural to forced oxidation operation can have a significant effect on both limestone utilization and SO₂ removal efficiency of an FGD system. Conversely, if the limestone utilization is maintained at a constant level, the SO₂ removal efficiency will increase. Conversely, if the pH is held constant, the limestone utilization will increase significantly. 2. This characteristic of a forced oxidation system can translate into lower L/G requirements and, therefore, reduced capital and operating costs for slurry recycle pumps. 3. Forced oxidation operation will provide improved limestone utilization and, therefore. reduced limestone reagent costs.

매립지 환경조건을 고려한 중금속 용출시험의 재평가

김은호,박진식,안종수,김정권,성낙창,장성호 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

This study was to understand leaching characteristics with pH controlling agents and Temp. control, and investigate leaching characteristics with pH control from opening a leaching test to an end for reassessing leaching test of heavy metals with enviromental conditions in landfill. The results were as followed ; 1. Because leaching of heavy metals was increased in low pH, pH must control for leaching in existing leaching test. 2. Generally, regulation time(6hr) of leaching was confirmed reasonablely, except for Cu in plating sludge. 3. In pH controlling solution, there was nearly not difference between Acetic acid and HCl, and if considering Cu, the former was appropriate. 4. In a part of heavy metal, leaching rate was increased in high Temp, and normal Temp, in existing leaching test would be revaluated.

정석탈인공정에서 폐굴껍질의 정석재 특성에 관한 기초연구

김은호,손희정,박진식,성낙창,장성호 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.1

In this study, waste oyster shells which can be easily obtained from the ocean, were used as a Seed Crystal, and effects of several physical/chemical factors on the phosphorous removal efficiencies were examined by batch tests. Ca^(2+) and pH affected phosphorous crystallization process using waste oyster shells were enough to leach phosphorous removal. As alkalinity of wastewater increased, phosphorous removal efficiencies gradually decreased. Also, because specific area and contact efficiency per unit area were increased in case of the small particle size of waste oyster shells, phosphorous removal efficiencies increased.

손상정도계수와 외상치를 이용한 외상환자의 분석

송근정,장문준,김성중,조광현,김인병,최성욱,이한식 대한응급의학회 1993 대한응급의학회지 Vol.4 No.2

Trauma is one of the most common causes of death. Recently, injury severity score(ISS) is widely used to evaluate and classify the patients with multiple injury. Trauma score(TS) was developed as a means of providing rapid accurate assessment of the injured patient. Authors conducted a review of trauma patients who visited the emergency department of YongDong Severance Hospital from September 1992 to August 1993. ISS and TS were collected from comprehensive initial evaluation. The results were as follows : 1) The subjects were 10.2%(2,666 patients) of total 26,202 emergency patients. 2) Male to female ratio was 2.1 : 1. The age distribution was highest under 10 year(24.9%). The mean ISS was 3.5, and the mean ISS increased with ago. 3. Analysis of injury mechanism showed high incidence of traffic accident(35.3%), blunt trauma 25.7%, fall 24.2%, stabbing 10.7%, and others 4.3% in order. 4. The 8.0% of patients were admitted after initial management and their mean Iss was 12.6 mean TS was 15.5. 5. Among admitted traffic accident patients, the mean ISS of passenger T.A., pedestrian T.A. and driver T.A. were 19.0 ±9.9, 14.4 ±10.6, and 11.3 ±7.7 respectively. 6. Among 42 mortality cases, 25 patients were D.O.A. and 17 were expired. The mean ISS of D.O.A. Patients was 30.0; the mean Iss and mean Iss and mean TS of expired patients were 28.3 and 11.8 respectively. 7. The most common cause of death was head trauma(66.7%). 8. By comparing the ISS and TS of admitted and expired patients, mortality occurred above 16 point of ISS. The mortality increased with increasing ISS, but it was influenced by the trauma site and the severity of the particular injury site. Mortality also occurred below 15 point of TS, the mortality increased inversely with TS, and the mortality with TS, and the mortality was high below 13 point (above 40%).

컴퓨터 본체에 장치된 Fan의 접촉부에서 발생하는 래틀의 확률적 해석

이성엽(Seong-Yeop Lee),최주호(Joo-Ho Choi),이제성(Je Seong Lee),김준식(Joon sick Kim) 한국신뢰성학회 2015 한국신뢰성학회 학술대회논문집 Vol.2015 No.5