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화력발전소 바닥재로부터 합성된 제올라이트의 반응온도와 알칼리 농도에 따른 상변화에 대한 연구
전소연,한기천,안지환,Jun So-Youn,Han Gi-Chun,Ahn Ji-Whan 한국결정성장학회 2004 한국결정성장학회지 Vol.14 No.5
국내 화력발전소에서 배출되는 석탄회 중에서 비산재의 재활용률은 점점 증가하고 있으나, 바닥재는 현재 전량 매립되고 있는 실정이다. 이에 본 연구에서는 바닥재로부터 제올라이트를 합성함으로써 바닥재의 고부가가치 물질로의 전환 가능성을 알아보았다. 실험을 위해 분쇄한 바닥재를 반응온도$(80,{\;}120,{\;}150^{\circ}C)$ 및 NaOH농도(1~5M)를 변화시키면서 알칼리 수열합성법으로 반응시킨 결과, NaPl, hydrxoy-sodalite, tobermorite 등이 생성되었다. 특히, $120^{\circ}C$ 이하의 온도 및 2M이하의 NaOH농도에서 양이온교환능력이 우수한 것으로 알려진 NaPl이 높은 결정성을 갖는 것으로 나타났다. Though the recycling rate of coal fly ash generated from domestic thermoelectric power plants is gradually increased, at present, the most amount of coal bottom ash is disposed by a landfill instead of recycling. Therefore, to reuse a coal bottom ash as high-value materials the synthesis of zeolite made from a coal bottom ash was investigated in this study. NaPl, hydroxy-sodalite and tobermorite were produced through the alkaline hydrothermal reaction of pulvelized bottom ash at various temperatures; 80, 120, $150^{\circ}C$, and the concentration of NaOH at the range from 1 to 5 M. Especially, NaPl with excellent cation exchange capability had a high crystallinity at ${\leq}2$ M NaOH and ${\leq}120^{\circ}C$.
요양병원 입원노인의 신체활동, 무력감, 수면의 질이 주관적 안녕감에 미치는 영향
이윤정(Yun Jung, Lee),우경미(Kyung Mi, Woo),이연향(Youn Hyang, Lee),전소연(So Yeun, Jun) 한국간호연구학회 2020 한국간호연구학회지 Vol.4 No.1
Purpose : The purpose of this study is to provide factors affecting subjective well-being for geriatric hospital elderly inpatient. Methods : Participants were 172 elderly at geriatric hospital in P city. Data was collected from October 12, 2017 to March 10. 2018. There were significant differences in subjective well-bing according to education state, times of admission, life satisfaction, perceived health status and presence of regular exercise of the subjects. Results : There was a significant positive correlation between physical activity(r=.18), quality of sleep (r=.21) and subjective well-bing. There was a significant negative correlation between powerlessness(r=-.32) and subjective well-bing. From the multiple regression analysis, the most significant factors affecting subjective well-bing were powerlessness(β=-.31), and presence of regular exercise(β=.28), physical activity(β=.25) and quality of sleep(β=.14). These variables explained 26.0% of the total variance in subjective well-bing. Conclusion : In order to increase subjective well-bing of elderly inpatients in geriatric hospital, it is necessary to prepare measures the first thing to decrease powerlessness and to increase physical activity and quality of sleep encouraged to develop.