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폐굴껍질 및 천연제올라이트 연속흡착탑을 이용한 피혁폐수 중의 유기물·질소제거 특성
정유진,하상안,최성문,성낙창,임영석 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1
The object of this study is to remove the nitrogen from tannery wastewater using waste oyster shells and natural zeolites. In many cases, components of industrial process wastewater are non-readily biodegradable, but can be effectively removed from wastewater by means of adsorption process. The technologies of removing nitrogen, considered as one of the most important control nutrients causing eutrophication in various water bodies, have been investigated by many researchers. Through the continuous adsorption experience, waste oyster shells have effects to control COD and pH rising. And natural zeolites are found to have the good ability to adsorb NH₄^(+) ion in the wastewater. As a result of this study, continuous adsorption column filled with oyster shells and natural zeolite, especially the ratio of 1 : 2 by volume, is found to be effective in nitrogen removal and economic aspect.
정유진,문종익,성낙창,김부길,이영형 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1
This study is carried out to investigate the water quality change trends in Pusan Metropolitan streams. The temperature of the streams are moderate except in winter period and this can be explained by the Korean meterological characteristics. The pH does not vary by the time but some points are a little low. BOD_(5) and COD_(Mn), the index of water contaminants, be shown as characteristic domestic waste water patterns. The nutrient matters, such as total nitrogen and total phosphate, are appeared to be low. The chronic water quality, as BOD_(5) and COD_(Mn), shows that the loading rates in 1998 are smaller than the past(1983, 1992). Some points show a little high loading in autumn, but this needs more investigation to make clear the cause(s).
최낙진,심창현,송갑득,주병수,이윤수,이상문,이덕동,허증수 한국센서학회 2002 센서학회지 Vol.11 No.5
단일 기판위에 온도측정용 Pt 박막과 Pt 히터 그리고 가스 감지를 위하여 순수한 SnO_2 박막과 Pt가 첨가된 SnO_2박막을 설계하고 제작하였다. 제작된 소자는 실내환경가스인 이산화탄소, 프로판 그리고 부탄의 분류에 응용되었다. 동작 온도를 가변하기 위하여 히터의 입력 전압을 사다리꼴로 인가하면서 SnO_2 감지막의 반응특성과 실내환경가스들에 대한 분류여부를 조사하였다. 감지막 반응특성곡선에서 여러 변수들을 추출한 후 주성분분석(principal component analysis : PCA)을 통하여 가스 분류 특성을 검증하였다. Two SnO_2 based sensing films(pure SnO_2 and SnO_2/Pt) and a Pt thin film for temperature sensor on an alumina substrate were designed and fabricated for classifying the indoor environmental gases. By controlling the heating power in the shape of trapezoid, unique four sensing response curves created from both SnO_2 film and SnO_2/Pt film. Then, various parameters were extracted from sensing response curves and carried out principal component analysis(PCA). The results confirm that a sensor array with the proposed operating mode was extremely effective in classifying indoor environmental gases such as CO_2, C_3H_8, C_4H_10.
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.
폐굴껍질을 산성토양 적용시 토양의 화학적 특성변화에 관한 기초 연구
임진희,문종익,김성우,성낙창,이영형,윤태경 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2
Oyster shell has caused environmental problems in the coast. But it is possible to be used as an acidic soil amendment because it is the alkalic material of pH 9.0. In order to evaluate the utility of the crushed oyster shell as a soil amendment, acidic sandy loam soil was amended with it and then Chinese cabbages were cultivated in pots. The amount of the oyster shell was ⅰ)none, ⅱ)0.5kg/㎥, ⅲ)1.0kg/㎥, ⅳ)1.5kg/㎥, ⅴ)2.0kg/㎥ and ⅵ)2.3kg/㎥. The particle size of oyster shell consists of 34.88% of 40∼100mesh and 14.98% of larger than 100 mesh. It increased pH and the contents of available P₂O_(5) and SiO₂ and exchangeable Ca in used soil The application of oyster shell also increased the height and diameter of Chinese cabbages.
일개 중소도시에서 PC방을 이용하는 중·고등학생의 인터넷중독과 VDT증후군
박성은,이동욱,이인구,배재익,성낙진,박기흠 대한보건협회 2003 대한보건연구 Vol.29 No.1
Background : It is one of the important daily activities for Korean students to use the Internet, and most of them go to FC bang. However, students uncontrolled Internet use causes compulsive Internet use, so called the Internet addiction. So we investigated the relationship between students internet use pattern and their Internet addiction. And also examined how internet addiction causes VDT syndrome. Method: We conducted survey with self-registered questionnaires for 1 months, from January to February 2000. On the questionnaire, we asked Internet use pattern to students in suburban area. To test the Internet addiction, this research adopted Dr. Young s Internet addiction self test, and also major 8 symptoms of VDT syndrome were tested. Results : There was not much difference in computer using time between at home and at PC bang, and among student s grade. We found 30.1% of the objects addicted to the internet, however, there was no relationship between Internet addiction and student s grade. We found statistically significant relationship between Internet addiction and VDT syndrome (p<O.o5) except ocular symptoms and dry mouth. Conclusion : As a result, we found that Internet adhction is related with the spending time on computer use, although there is no relationship between Internet addiction and student s grade. There are significant correlations between internet addiction and VDT syndrome. So internet addiction is not only social and psychiatric problem but a physiologic dsorder whch affect student s health.
부직포활성슬러지법에 의한 하수와 침출수처리에 관한 기초연구
정유진,고현웅,김경순,윤태경,성낙창 한국환경과학회 2003 한국환경과학회지 Vol.12 No.10
In this study, it was performed using submerged nonwoven bioreactor(SNBR) for removal of organic matter, nitrogen and phosphate under different aeration intervals(intermittent aeration). We applied the SNBR at the cheap nonwoven fiber module instead of the expensive membrane. The SNBR was mainly made up of an activated sludge reactor and a transverse flow nonwoven module. with an innovative configuration being in application between them. In case of sewage, the aeration conditions experimented consist of continuous aeration and 60min/60min, 120min/60min, 120min/120min of aeration/nonaeration time intervals, respectively. In case of landfill leachate, the intermittent aeration condition was 120min/120min at aeration/nonaeration. Consequently. a high COD removal rate (about 94%) was achieved in sewage and leachate. Although nutrient removal rate was relatively high without any additional chemicals.
정유진,김은호,성낙창 진주산업대학교 환경문제연구소 1998 環境硏究論文集 Vol.1 No.-
In point of waste resources, this study was performed to investigate the adsorption possibility of color contained in dying wastewater, evaluate the adsorption efficiency of waste resources for color comparing with the activated carbon, and examinate the recycling possibility as a substitute. Considering Alum as a coagulant for removing color, because high Al_2O_3 was contained in peat, we could know that peat was capable of removing color. In we reflected the adsorption capacity(k) and adsorption intensity(1/n) of Freundlich isotherm, we couldn't consider peat as a good adsorbent for removing color and peat could look forward to an expected economical effect.
쓰레기 埋立場 浸出水 중의 重金屬 除去에 관한 實驗的 考察
金秀生,成樂昌,鄭賑化 동아대학교 환경문제연구소 1989 硏究報告 Vol.12 No.1
This study was carried out in a batch apparatus to removal Heavy Metals using zeolite (Z-Ⅰ, Z-Ⅱ) actived carbon (A-Ⅰ, A-Ⅱ) and mixed zeolite-actived carbom (ZA-Ⅰ, ZA-Ⅱ, ZA-Ⅲ) as an adsorbents. Some results obtained are summerized as followings ; 1. The best on of seven adsorbents is ZA-1 (Zeolite ; Activated carbon=1 : 1) in batch adsorption tests. 2. Equilibrium relations·between adsorbents and adsorbates was concided in Freundlich equation. (0.33≤1/n≤0.71) 3. When ZA-Ⅰ was used as adsorbents, The Removing Rate of Cr(Ⅵ), Cd(Ⅱ), Pb(Ⅱ) and Zn(Ⅱ) was 59%, 54%, 79% and 68% in 10 minutes and the adsorption equilibrium was reached in 30 minutes. 4. The optimum pH values ranged 5.0 to 7.0.