http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
목재방부제(CCA) 오염토양의 소성가공 굴껍질을 이용한 비소 안정화
문덕현 ( Deok Hyun Moon ),정경훈 ( Kyung Hoon Cheong ),김태성 ( Tae Sung Kim ),김지형 ( Jee Hyeong Khim ),최수빈 ( Su Bin Choi ),문옥란 ( Ok Ran Moon ),옥용식 ( Yong Sik Ok ) 韓國環境農學會 2009 한국환경농학회지 Vol.28 No.4
폐굴껍질을 분쇄하여 만든 안정화제 NOS와 NOS를 900℃에서 2시간 소성하여 제작한 안정화제 POS를 비소오염토양에 적용시켜 처리하여 28일 동안 습윤양생 시켜 토양오염공정시험기준 (1N HCl 추출)에 따라 비소 가용능을 평가하였다. NOS와 POS 모두 오염토양 무게대비 함량이 증가할수록 비소오염 토양안정화에 효율적이었다. 특히 주성분이 방해석인 NOS에 비해, 주성분이 생석회인 POS가 안정화에 매우 효과적이었다. 입경에 따른 안정화 효율을 분석한 결과 -#20 mesh가 -#10 mesh보다 대체적으로 좀 더 효율적이었다. 오염토양 대비 -#10 mesh POS 20% 첨가 시 습윤양생 28일 후 1N HCl 추출로 가용성 평가시 12 mg/kg으로 분석되어 토양환경보전법의`나`지역 우려기준인 20 mg/kg을 만족하였다. 그러나 -#20 mesh NOS 20% 첨가 시 같은 용출법으로 169 mg/kg로 분석되어 POS를 안정화제로 사용시 NOS보다 매우 효과적임을 알 수 있었다. SEM-EDX를 통한 비소 안정화 기작은 불용성 물질인 Ca-As 침전물에 기인한 것으로 판단되며 또한 CAHs, CSHs와 같은 포졸란 물질도 비소 농도 저감에 기여하는 것으로 사료된다. Arsenic (As) is known to be very toxic and carcinogenic to human beings. Arsenic contaminated soil was collected from a timber mill site at Busan Metropolitan City, Korea, where chromated copper arsenate (CCA) had been used to protect wood from rotting caused by insects and microbial agents. The soil was stabilized using both natural oyster shells (NOS) and calcinated oyster shells (POS). The calcination of natural oyster shells was accomplished at a high temperature in order to activate quicklime from calcite. Two different oyster shell particle sizes (-#10 mesh and -#20 mesh) and curing periods of up to 28 days were investigated. The stabilization effectiveness was evaluated based on the Korean Standard Test (KST) method (1N HCl extraction). The stabilization results showed that the POS treatment was more effective than the NOS treatment at immobilizing the As in the contaminated soils. A significant As reduction (96%) was attained upon a POS treatment at 20 wt% and passed the Korean warning standard of 20 mg/kg (`Na` area). However, an As reduction of only 47% (169 mg/kg) was achieved upon a NOS treatment at 20 wt%. The -#20 mesh oyster shells seem to perform better than the -#10 materials. The scanning electron microscopy (SEM)-energy dispersive X-ray spectroscopy (EDX) results showed that As immobilization was strongly associated with Ca and O in the presence of Al and Si.
제6주제 : Stabilization of lead (Pb) contaminated army firing range soils using waste oyster shells
문덕현(Deok Hyun Moon),정경훈(Kyung Hoon Cheong),김태성(Tae-Sung Kim),김지형(Jeehyeong Khim),최형일(Hyung-il Choi),최수빈(Su Bin Choi),문옥란(Ok Ran Moon),방선백(Sunbaek Bang) 대한환경위생공학회 2009 대한환경위생공학회 정기총회 및 학술발표회 Vol.2009 No.-
A stabilization technique was applied to immobilize lead (Pb) in contaminated soils obtained from army firing ranges using waste oyster shells. Both natural waste oyster shells (NOS) and pretreated oyster shells (POS) were used as the main stabilizing agents. The pas were roasted at a high temperature to activate quicklime from the calcite in the shells. The treatments were performed with two different particle sizes (2 ㎜ 0.853 ㎜) at a curing period of 8 days. Pb leaching tests from both NOS and pas stabilized soil samples cured for 28 days were evaluated using the Korean Standard Test (KST) method (01N Hel extraction). The treatment results using oyster shells of 2 ㎜ in size, after 28 days of curing, indicated that the pas treatment was more effective than the NOS treatment at stabilizing the Pb in the contaminated soils. All the NOS treatments failed to meet the Korean warning standard of 100 ㎎/㎏. However, less than 50 ㎎/㎏ of Pb leached (> 99% Pb reduction) from the 15 wt% and 20 wt% pas stabilized soils, after 28 days of curing. Moreover, the particle size reduction of NOS using the 0.853 ㎜ size showed better performance in reducing Pb leachability while the particle size reduction of pas showed no significant effects on the reduction of Pb leachability. Overall, it could be concluded that the pas treatment was significantly effective at immobilizing the Pb in the contaminated soils and the pas could be utilized as a cost effective stabilizing agent.
Effect of pulverizing method on the particle size of matured silkworm powder
( Su-bae Kim ),( Kee-young Kim ),( Sang-deok Ji ),( Seong-wan Kim ),( Nam-suk Kim ),( You-young Jo ),( Jong-gil Kim ),( Young-guk Kim ),( Hui-yeon Koo ),( Hyung-chul Moon ),( Young-seek Seok ),( Hyun- 한국잠사학회 2018 International Journal of Industrial Entomology Vol.37 No.2
Recently matured silkworm powder was developed by RDA. In this study, the effect of pulverizing method on the particle size of matured silkworm powder was examined. FESEM was performed to observe the morphology and to measure the particle size of silkworm powder. Particle morphology of air-jet mill pulverized powder was round and smooth, however, those of roller-mill and hammer-mill pulverized mature silkworm was more harsh and square. Particle size was varied with pulverizing technique as follows; 1.1 μm (air-jet mill), 10 μm (roller mill), and 120 μm (hammer mill), respectively. A proximate analysis results of air-jet mill powder showed that crude protein, crude lipid, crude fiber, and ash was 73%, 12%, 1.95%, and 3.4%, respectively. According to our results, air-jet mell technique might be used to make a tiny matured silkworm powder.
Physical and psychological changes induced by exercise
Su-Yeon Kang,Young-Joo Kim,Ji-Young Park,Deok-Ahm Seo,Hye-Min Lee,Moon-Myeon Jung 한국운동재활학회 2014 한국운동재활학회 학술대회 Vol.2014 No.10
This study was intended to investigate the positive physical and psychological changes about the reduction of the visceral and body fat and the growth of the amount of muscle and basal metabolism by the exercise. The subjects of this study were 6 students who are 2nd grader and whose major are Exercise rehabilitation welfare in Gachon university. This study was conducted from May 7th, 2014 to June 4th, 2014 as a consensual qualitative research. For this study, 4 research tools(Body tissue composition test chart, Daily record of Exercise, Body image questionnaire and the Interview) were used. Body tissue composition test chart and Body image questionnaire were used to compare changes before and after the study. 6 Participants delineated Exercise list, time and psychological changes before and after the exercise in Daily record of Exercise. 6 participants all attended the Interview. One participant was asked by 5 participants about Daily record of Exercise. After the Interview, 5 Participants checked whether it is true or false. Based on the above research method and procedures, the following conclusion was drawn; First, all participants‘ visceral fats were reduced and the score of physical development was increased. Second, Body image satisfaction was increased by psychological changes. Third, all participants experienced various psychological changes during this study.
Surveilance of sporadic insect pests in Jeonbuk
Su Ji Jang,Hyung Cheol Moon,Deok Ryeol Lee,Ju Hee Kim 한국응용곤충학회 2023 한국응용곤충학회 학술대회논문집 Vol.2023 No.10
The occurrence level of Metcalfa pruinosa, Halyomorpha halys, and Spodoptera litura was investigated in persimmon tree and bean cultivation fields in 14 cities and counties of the Jeonbuk region in June and July. Metcalfa pruinose was visually inspected, while Halyomorpha halys and Spodoptera litura were investigated by installing pheromone traps and counting the number of captured individuals once, seven days after trap placement. Metcalfa pruinose nymphs occurred in eight cities and counties, which showed an increase compared to the previous year, and Halyomorpha halys nymphs had higher occurrences in the plains, with an average count of 5.5. The average count of Spodoptera litura was 26.7, which was lower than the previous year.