미국의 스포츠 매니지먼트 연구동향 분석

이강우,육조영,문행자,백광 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The graduates of sports management are employed about to amateur organization, company sports department, country club, resort, public institution, citizen sports center, horse racing, pro-sports team, management or marketing of university games, athlete agency and the campus games and clubs like to recreation sports. Sports management gives the possibility enough to people that interested in sports career. The future of the field depends on the talent' success that finished to sports management process.

Sorption of Aqueous Toxic Anions on Calcined Mg/Al Layered Double Hydroxide

Mun Ja Kang,Seog Woo Rhee,Pil Soo Hahn 대한환경공학회 2003 Environmental Engineering Research Vol.8 No.1

Drying Experiment of Borate Waste and Characteristics of Dried Products

Kang, Mun-Ja,Kim, Hwan-Young,Kim, Joon-Hyung Korean Nuclear Society 1992 Nuclear Engineering and Technology Vol.24 No.3

An experiment was conducted to determine the reaction of boric acid with lime and the drying of its product using a reactor-dryer. no characteristics of dried products were observed. The major chemical species of dried Products was calcium borate of 2CaO.B$_2$O$_3$. From the particle size distribution of the dried products, it was found that quick lime was better than slaked lime as an additive. The Ca/B mole ratio of reaction was determined to be 3/4 considering the cohesion and agglomeration properties of dried products. The flowability of dried products up to 8 wt% of water content was acceptable for transport process and to reduce drying time.

Precipitation And Adsorption Of Uranium (4) Under Various Aqueous Conditions

Mun Ja Kang,Bo Eun Han,Pil Soo Hahn 대한환경공학회 2002 Environmental Engineering Research Vol.7 No.3

Adsorption Behavior of Aqueous Europium on Kaolinite under Various Disposal Conditions

Kang, Mun Ja,Hahn, Pil Soo 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2

This work investigated the adsorption behavior of europium on kaolinite under various disposal conditions. Batch-wise adsorption and precipitation experiments and equilibrium model calculations were performed over a pH range of 4-10 and CO_(2) concentration range of 0%, 0.03%, and 10%. Experimental precipitation behaviors are in agreement with the results of equilibrium model calculation using the geochemical code MINTEQA2. Aqueous species of Eu^(34) exists mainly at pH 5 or below and solid phases of Eu(OH)_(3)(s),Eu(OH)CO_(3), and Eu_(2)(CO_(3))_(3)·3H_(2)O(s)are formed at higher pH ranges. Adsorption behavior of Eu on Kaolinite in the low pH range can be explained by interlayer ion-exchange reaction. The significant increase in adsorbed amount at pH 5-6 is due to the surface complexation at the edge site of kaolinite. In the high pH range, precipitation of Eu contributes mainly to the adsorption quantity. The rapid decrease in adsorbed amount above pH 7 under 10% CO_(2) condition occurs by the formation of anionic europium species of Eu(CO_(3))_(2). The adsorption of Eu on kaolinite could be well interpreted by the Fredundlich adsorption isotherm. The data except for the highest equilibrium concentration ranges were also explained by Langmuir isotherm and the maximum adsorbed quantity of Eu on kaolinite, b, is 1.2 mg/g.

Radioactivity Analysis of 55Fe and 63Ni in Dismantled Concrete

Mun Ja Kang,Kun Ho Chung,Sang Bum Hong,Geun Sik Choi,Chang Woo Lee 한국방사성폐기물학회 2007 방사성폐기물학회지 Vol.5 No.1

추출크로마토그래피법과 액체섬광계수법을 이용하여 고체 시료중의 와 방사능을 측정할 수 있는 분석법을 확립하고 연구로 2호기의 해체시 발생되는 방사화된 콘크리트 폐기물을 분석하였다. 침전법과 추출크로마토그래피법으로 화학분리를 하면, 경우 Fe의 화학적 회수율은 대부분의 시료에서 90%이상이었으나 Ni의 회수율은 43.6과 46.5%를 나타낸 시료가 있으며 나머지는 62% 이상을 나타내었다. Spiked 시료를 이용하여 분리과정과 액체섬광계수법의 과정을 확인한 결과 의 경우는 3.7% 오차내의, 의 경우는 0.7% 오차내의 결과가 얻어졌다. 연구로 2호기의 해체 콘크리트 시료중 방사능은 MDA이하의 값도 있으나 TC3시료의 경우는 362Bq/g의 값이 얻어졌다. 그리고 의 경우는 모든 시료에서 MDA이하 값이 얻어져 이 존재하지 않음을 알 수 있었다. 그리고 콘크리트 벽의 해체시 표면의 시료는 의 방사능이 높다가 표면으로부터 깊은 시료일수록 의 방사능이 급격히 줄어들었다. Combined method of extraction chromatography and liquid scintillation analysis was established for determinating radioactivity in solid samples. Activated concrete wastes generated from dismantling KRR-2 were analysed. The sequential separation including precipitation and extraction chromatography resulted in the above 90% chemical recoveries of Fe. Above 62% recoveries of Ni were obtained by this procedure exception to 43.6 and 46.5% recoveries. The seperation and counting procedure was also confirmed with spiked samples of known quantity. The measured and spiked quantity were agreed with the 3.7% and 0.7% variations in the experiments, respectively. The radioactivities of in the dismantled concretes are shown from below MDA to maximum 362 Bq/g. The radioactivities of in all concrete samples are below MDA. The doesn't exist in dismantled concretes from KRR-2. The radioactivity of is decreased rapidly as the sampling depth is increased from the concrete surface.

Analytical Procedures for Measuring 35S in Radioisotope Wastes

Sora Choi,Mun Ja Kang,Mun Ja Kang 한국방사성폐기물학회 2021 한국방사성폐기물학회 학술논문요약집 Vol.2021 No.06

77K와 상온에서 CO(NH₂)₂의 ¹⁴N Pulsed NQR 연구

강재필,박영민,전인,김성재,최숙자,박현진,송승기,서용문 명지대학교 자연과학연구소 1996 자연과학논문집 Vol.13 No.-

77K와 상온에서 CO(NH₂)₂분말 시료의 ??N Pulsed NQR실험을 하여 위와 아래 공명 진동수, 핵 사중극 결합상수, 비대칭 인자, 스핀-스핀 완화시간, 결정 격자 진동에서의 평균 비틀림 진동수, 진동자의 관성 모먼트 등을 구하였다. 공명 진동수의 온도 의존성은 전형적인 Bayer이론의 격자 진동에 의한 주파수 변화를 보였다. Bayer-Kushida이론의 고온근사식을 실험값에 적용하여 OK에서 공명 진동수 ν??와 ν??를 구했으며, 77K와 상온에서의 스핀-스핀 완화시간 T₂를 관측했다. 상온에서 T₂의 감소는 결정 내의 reorientation motion과 관련이 있을 것으로 보인다. Upper and lower resonance frequencies, nuclear quadrupole coupling constants, asymmetry parameters, spin-spin relaxation time, average torsional frequency in the crystal lattice motion and moment of inertia in the oscillator are found for CO(NH₂)₂powder sample by using ??N Pulsed NQR(Nuclear Quadrupole Resonance) technique at 77K and room temperature. Temperature dependence of resonance frequencies showed frequency variation in agreement with the typical Bayer's theory in lattice motion. Resonance frequencies ν?? and ν?? at OK were obtained by fitting the high temperature approximation of Bayer-Kushida theory to the experimental data and spin-spin relaxation time (T₂) was observed at 77K and room temperature. Decrease of T₂at room temperature was explained by the effect of reorientational motion in the crystal lattice.

황철석 , 마그네슘 산화물과 Mg/Al LDH 에 대한 요오드 음이온의 흡착특성

강문자,한필수,이석우 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.4

유해물질인 요오드 음이온에 대한 흡착특성이 높은 물질을 찾기 위해 여러 종류의 광물과 산화물에 대해 흡착실험을 회분식으로 실시하고 이들의 흡착특성을 비교해 보았다. 문헌조사와 예비 흡착실험결과로부터 황철석, 마그네슘 산화물과 소성된 Mg/Al Layered Double Hydroxide가 요오드 음이온에 대해 비교적 좋은 흡착특성을 나타냄을 알 수 있다. 황철석과 마그네슘 산화물의 경우 흡착제의 농도가 일정할 때 초기 요오드 농도가 증가함에 따라 흡착된 요오드의 농도는 증가하였다. 그리고 이들 물질에 대한 요오드 음이온의 흡착특성은 Freundlich 흡착등온선 형태를 따름을 알 수 있다. 소성된 Mg/Al LDH의 경우는 이산화탄소가 배제된 조건에서 흡착실험을 진행시켰는데 황철석과 마그네슘 산화물에 비해 흡착량이 큼을 알 수 있었다. 그리고 소성된 LDH에 대한 요오드 음이온의 흡착등온선은 Langmuir 형태를 나타내고 이때 얻어진 최대흡착량은 3.8×10^(-3)㏖/g이며 K_(ads)는 7.1×10³이다. 소성된 LDH에 대한 요오드 음이온의 흡착은 소성된 LDH의 재구성 반응에 의한 것이며 이는 2단계의 이온교환 과정을 포함한다. 수용액중에 존재하는 탄산이온이 요오드 음이온의 흡착에 미치는 영향을 황철석, 마그네슘 산화물과 Mg/Al LDH에 대해 확인해 보면 황철석과 마그네슘 산화물에 요오드 음이온이 흡착될 때는 탄산이온의 방해를 받지 않고 소성된 LDH의 경우는 탄산이온의 농도가 높을 때 요오드 음이온의 흡착퍼센트가 크게 감소됨을 알 수 있다. To find out the materials having a high adsorption capacity for iodide anion, the adsorption characteristics of iodide on minerals, rock and oxide compounds were investigated and compared by batch experiments. Pyrite, magnesium oxide and calcined Mg/Al LDH are found as good adsorbents for iodide from literature survey and preliminary experiments. When the amount of pyrite or magnesium oxide was constant, the adsorbed amount was increased with initial iodide concentration. The adsorption characteristics of iodide on pyrite or magnesium oxide is represented by Freundlich adsorption isotherm. The adsorption experiments on calcined Mg/Al LDH were performed under the conditions excluding carbon dioxide. The adsorbed amount of iodide on the calcined LDH was higher than that on pyrite or magnesium oxide. The adsorption characteristics of iodide on the calcined LDH is described by Langmuir adsorption isotherm. The maximum adsorbed amount of iodide on the calcined LDH and K_(ads) of adsorption reaction, resulted from adsorption isotherm, are 3.8×10^(-3) ㏖/g and 7.1×10³, respectively. The adsorption of iodide on the calcined LDH is caused by the reconstruction reaction of the calcined LDH and this reaction includes a two-step ion-exchange process. The influence of carbonate anions of the aqueous solution in the adsorption of iodide on pyrite, magnesium oxide and calcined Mg/Al LDH was also investigated. The adsorbed percent of iodide on pyrite or magnesium oxide in the presence of HCO₃^- is similar to that in the absence of HCO₃^-. However, the adsorbed percent of iodide on the calcined LDH decreased sharply with the concentration of HCO₃^- .

일라이트와 몬모릴나이트에 대한 수용액상에서의 유로퓸과 토륨의 흡착 특성

강문자,전관식,한필수,김희택,이덕권 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.5

점토광물인 일라이트와 몬모릴로나이트에 대한 수용액상에서의 유로퓸과 토륨의 흡착특성을 회분식 실험을 통해서 살펴보았다. 유로퓸의 흡착특성은 pH 6이하에서는 pH변화에 무관하며 Ca^(2+)의 영향을 많이 받아 이온교환 과정으로 해석할 수 있다. 그리고 pH 6과 8사이에서는 흡착량이 급격히 증가하는 pH모서리가 관찰되며 pH 8이상에서는 흡착량이 95%이상이었다. 이는 Eu^(3+)나 유로퓸 탄산착물과 광물과의 표면착물 반응에 의한 것으로 생각된다. 토륨의 흡착특성은 pH 3과 5 사이에서 흡착량이 급격히 증가하여 pH 5이상에서는 99%이상의 흡착량을 보였다. 이는 주로 Th^(4+)나 토륨 수산화물의 표면착물 반응에 기인한다. 두 광물에 대한 유로퓸과 토륨의 흡착은 Langmuir흡착등온선으로 나타낼 수 있었으며 흡착등온선으로부터 구한 최대흡착량은 일라이트의 경우 유로퓸과 토륨이 각각 32와 109 meq/100g이었고 몬모릴로나이트의 경우 각각 95와 128 meq/100g이었다. 그리고 MINTEQA2코드로 계산한 수용액상에서의 유로퓸 화학종은 EU^(3+), EuOH^(2+), EuCO₃^+, Eu(CO₃)₂^-이었고 토륨의 화학종은 Th^(4+), Th(OH)₂^(2+), Th(OH)₃^+, Th(OH)₄이었다. The adsorption characteristics of europium and thorium on clay minerals such as illite and montmorillonite were investigated by batch experiments. The adsorbed amount of Eu was constant as a function of pH and much affected by a Ca^(2+) ion at pH below 6. This means the Eu adsorption at low pH is described by ion-exchange reaction. The adsorbed amount was increased rapidly in the range of pH 6-8, which corresponds to pH edge. The adsorbed Eu was more than 95% of total Eu at pH above 8. The Eu adsorption at high pH is caused by the surface complexation reaction between Eu^(3+) or europium carbonates and minerals. The adsorbed amount of Th was sharply increased in the range of pH 3-5. Th adsorbed Th was more than 99% of total Th at pH above 5. The Th adsorption is mainly due to the surface complexation of Th^(4+) or thorium hydroxides. The adsorption characteristics of Eu and Th on illite and montmorillonite is represented by Langmuir adsorption isotherm. The maximum adsorbed amount of Eu and Th on illite, resulted from adsorption isotherm, is 32 and 109 meq/100 g, respectively. The maximum amount of Eu and Th on montmori4onite is 95 and 128 meq/100 g, respectively. The Eu-species calculated by MINTEQA2 are Eu^(3+), EuOH^(2+), EuCO₃^+ and Eu(CO₃)₂^-. The Th exists in the species of Th^(4+), Th(OH)₂^(2+), Th(OH)₃^+ and Th(OH)₄ in the aqueous phase.