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學校周邊騷音에 대한 學生意識構造 조사 : 대구지역 고등학교 2학년을 대상으로
금경호,김복련,서양곤 경상대학교 환경보전연구소 2000 環境保全硏究所報 Vol.8 No.-
The purpose of this study was to investigate the students' consciousness against noise around nine high schools in Taegu City. It was carried out to make up and analyze a question of noise. The results are summarized as follows : 1. Two schools whose Leq was below 50㏈(A) showed comparatively little noise pollution from noise measurement of schools. Four schools, though their Leq was a little more than 50㏈(A), were supposed to have little complaint about noise because their TNI value was less than 50. Three schools was estimated to have extreme discontentment about noise because their Leq was more than 60㏈(A), so exceeded environmental standard value(50㏈(A)) and their TNI exceeded 70. 2. In questionaire, 61.2% of respondents answered that noise around school was very severe. The main sources of noise were street traffic(45.7%). In season the noise of summer was most severe(81.0%) The responsibility of noise was given to school(21.0%) and community(30.1%). The questionaire showed that damage to study was 56.2% in class, 24.8% in examination. The response to noise during class showed that most students studied bearing noise but 12.3% students gave up studying. About physical damage, 10% students answered 'a little severe' or 'severe', so physical damage was not serious. About mental damage, 30% students-answered 'a little severe' or 'severe', so three times large as the physical damage. As the result, today noise around school in Daegu cause great damage to students in school life, especially study and its psychological effect. Therefore, to live in a good sound environment the study of counterplans to noise around school must be continued.
나노 기공의 탄소 멤브레인에서 기체의 선택적 분리를 위한 Monte Carlo 모사
이호수,금경호,서양곤 경상대학교 환경보전연구소 2000 環境保全硏究所報 Vol.8 No.-
The object of this study is to separate hydrocarbon selectively using MC method and carbon membrane. 12-6 Lennard-Jones potential function was used to describe reciprocal action of gas molecules. 10-4-3 potential function suggested by steele was used to calculate reciprocal action of molecules and pore walls. The membrane pore is composed of slit-like pores. it is include high-pressure region(H-region). low-pressure region(L-region) and M-region. between H-region and L-region. In the membrane. the transport of molecules with small size were high when the pore size is small. but in the case of molecules with large size were opposite to the transport of molecules with small size. we have found that the diffusion through surface effected on molecules transport by discussion of snapshots and density profiles. So. if the control of the pore size and surface diffusion were used to obtain high selectivity. it will be very useful method to improve the energy efficiency.
김병호,금경호,서양곤 경상대학교 환경보전연구소 2001 環境保全硏究所報 Vol.9 No.-
Ozone was first used to disinfect water supplies in France in the early 1900s. Its use increased and eventually spread into several Western European countries. Today nearly 1,000 ozone disinfection installations exist (primarily in Europe), almost entirely for treating water supplies. A common use for ozone at these installations is to control taste-producing, odor-producing and color-producing agents. Ozone can also be used in wastewater treatment for odor control and in advanced wastewater treatment for the removal of soluble refractory organics, in lieu of the carbon-adsorption process. Ozone is also very effective virucide and is generally believed to be more effective than chlorine. Ozonation does not produce dissolved solids and is not affected by the ammonium ion or pH influent to the process. For these reasons, ozonation is considered a alternative to either chlorination of hypochlorination, especially where dechlorination may be required.
킬레이트 수지에 의한 Mo(Ⅵ)과 W(Ⅵ)의 분리 및 흡착
김복련,안주현,서양곤 경상대학교 환경보전연구소 1999 環境保全硏究所報 Vol.7 No.-
Three kinds of chelate resins bearing iminodiacetic acid, diethanolamine or diethylenetriamine have been applied to selectively separate and recover one component in a mixture of heavy metals, Mo and W, where their chemical properties are very similar. The adsorption behavior of metal ions was investigated for each chelate resin under various experimental conditions such as time, pH, metal ion concentration by a batch experiment. The chelate resins complexed by Mo or W were characterized by FTIR and ¹H NMR. The metal uptake of each chelate resin decreased with increasing pH. The resins were found to selectively chelate MoO₄^2- over a pH range of 2∼6. The chelate resin with diethanolamine groups showed the maximum adsorption capacity for Mo and W over a pH range of 1∼6 among three resins used. However, the resin with iminodiacetic acid groups showed the best results to separate Mo and W selectively. The ¹H NMR study using the homogeneous analogue suggests the higher selectivity of iminodiacetic acid group toward Mo over W.
메탄과 에탄의 흡착평형에 대한 활성탄의 기공 크기 분포의 영향
김대규,금경호,서양곤 경상대학교 환경보전연구소 2000 環境保全硏究所報 Vol.8 No.-
The adsorption equilibria of methane and ethane in a slit pore model of activated carbon were studied by using Monte Carlo method. In potential caculation. the fluid-fluid interactions are described using the "12-6" Lennard-Jones potential function. and fluid-pore surface interactions are described using the "10-4-3" potential function proposed by Steele. It showed that the pore size distributions effected isotherms from the simulation results in pure component adsorption of methane and ethane at 1∼30 bar pressure. Also adsorbed moleculars could identified occuping location and density from density profiles and snapshots.
제올라이트(NaA형, NaX형)의 이온교환성에 관한 연구
정순희,김복련,금경호,서양곤,안주현 경상대학교 환경보전연구소 2001 環境保全硏究所報 Vol.9 No.-
A study has been made of the exchange of Ag^+, Li^+, and Ba^++, Ca^++, Sr^++ ion by using synthetic zeolite-13X and zeolite-NaA. The zeolite used in this work was supplied as beads by Aldrich Chemical Company, Inc., and the formula of unit cell is M_x/n[AlO₂)_x(SiO₂)_y]zH₂O. X-ray diffraction analysis and Fourier transform infrared spectroscopy indicated that the crystallinity of zeolites was retained though sodium ion in zeolite exchanged with the cation. The amount of ion exchanged was measured by the determining of the amount of cation remained in solution by Inductively coupled plasma, and surface area, adsorption isotherm, Ion exchange kinetics. The selectivity of ions was in the order Ag^+>Li^+>Sr^++>Ca^++>Ba^++.
Yang Gon Seo,Sang Bo Park,Won Kook Lee 한국화학공학회 1988 NICE Vol.6 No.1
N/A A agitated vessel of Lewis cell type was used to investigate the effect of physical properties on the mass transfer coefficient for partially miscible binary systems. Some measurements were performed with ternary systems transferring only one solute across two immiscible solvents. The mass transfer coefficients were measured under the conventional contra-rotating conditions which were behaved as if the interface was not rotating for some combinations of agitation speeds in each of the two phases. The mass transfer coefficient was deduced from solving a steady-state two dimensional convective-diffusion equation with the assumption of sinusoidal motion of eddies. Owing to the complexity of the hydrodynamic conditions near the liquid-liquid interface, theoretical approach was impossible. Thus, the effects of forced turbulence and physical properties on the effective surface renewal time were experimentally investigated. The relation between the mass transfer coefficients and the relevant variables was obtained by conventional dimensional analysis as follows: (수식)
MCM-41과 MCM-48 메조포러스 내에서 VOC와 수분의 불균일 흡착
서양곤 ( Yang Gon Seo ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.3
MCM-41 and MCM-48 were prepared by sol-gel method. Structural characteristics of MCM-41 and MCM-48 were investigated using X-ray diffraction, nitrogen adsorption and desorption. The adsorption equilibrium data were also obtained for seven pure vapors (acetone, benzene, cyclo hexane, hexane, methanol, MEK and toluene)at 300.15 K for different MCM-48 using a gravimetric method. Adsorption equilibria of various VOCs on MCM-41 and MCM-48 were classified as type IV in accord with IUPAC recommendations. To correlate the collected experimental data, the hybrid isotherm equations such as Langmuir-Sips and inhomogeneous DA were used.