예비 마을기업제도의 필요성과 도입 방향

전지훈 충남연구원 2016 열린충남 Vol.76 No.-

침철석과 UVC-Lamp를 이용한 아비산염의 광촉매 산화

전지훈,김성희,조현구,김순오,Jeon, Ji-Hun,Kim, Seong-Hee,Cho, Hyen-Goo,Kim, Soon-Oh 대한자원환경지질학회 2017 자원환경지질 Vol.50 No.3

Arsenic (As) is known to be the most toxic element and frequently detected in groundwater environment. Inorganic As exists as arsenite [As(III)] and arsenate [As(V)] in reduced and oxidized environments, respectively. It has been reported that the toxicity of arsenite is much higher than that of arsenate and furthermore arsenite shows relatively higher mobility in aqueous environments. For this reason, there have been numerous researches on the process for oxidation of arsenite to arsenate to reduce the toxicity of arsenic. In particular, photooxidation has been considered to be simple, economical, and efficient to attain such goal. This study was conducted to evaluate the applicability of naturally-occurring goethite as a photocatalyst to substitute for $TiO_2$ which has been mostly used in the photooxidation processes so far. In addition, the effects of several factors on the overall performance of arsenite photocatalytic oxidation process were evaluated. The results show that the efficiency of the process was affected by total concentration of dissolved cations rather than by the kind of those cations and also the relatively higher pH conditions seemed to be more favorable to the process. In the case of coexistence of arsenite and arsenate, the removal tendency by adsorption onto goethite appeared to be different between arsenite and arsenate due to their different affinities with goethite, but any effect on the photocatalytic oxidation of arsenite was not observed. In terms of effect of humic acid on the process, it is likely that the higher concentration of humic acid reduced the overall performance of the arsenite photocatalytic oxidation as a result of competing interaction of activated oxygen species, such as hydroxyl and superoxide radicals, with arsenite and humic acid. In addition, it is revealed that the injection of oxygen gas improved the process because oxygen contributes to arsenite oxidation as an electron acceptor. Based on the results of the study, consequently, the photocatalytic oxidation of aqueous arsenite using goethite seems to be greatly feasible with the optimization of process.

Evaluation of dentin bond strength and degree of conversion for dual-cured adhesive system

전지훈,민정범 대한치과재료학회 2011 대한치과재료학회지 Vol.38 No.2

본 연구의 목적은 광중합형 접착제와 비교하여 이중중합형 접착제의 접착효율을 평가하는 것이었고 이를 위해 접착제들의 미세인장 결합강도와 중합율을 측정하였다. 광중합형 접착제로 Prime & Bond NT(Dentsply Caulk, Milford, DE,USA)와 X-P Bond(Dentsply Caulk, Milford, DE, USA)가 사용되었고, 각 접착제에 동일한 제조회사의 Self-cure Activator를 첨가해 이중중합형 접착제로 전환하였으며 총 4개의 실험군으로 분류하였다. 실험결과 광중합형 접착제를사용한 실험군이 이중중합형 접착제를 사용한 실험군보다 유의하게 더 높은 미세인장 결합강도를 보였으며(p<0.05),X-P Bond를 사용한 실험군이 Prime & Bond NT를 사용한 실험군보다 유의하게 더 높은 미세인장 결합강도를 보였다(p<0.05). 결합강도와 중합율 사이에서 선형의 상관관계가 나타났으며 높은 결합강도를 보인 실험군이 높은 중합율을보였다. 이중중합형 접착제는 광중합형 접착제보다 더 낮은 미세인장 결합강도와 낮은 중합율을 보였다. 그러므로 이중중합형 접착제의 사용 시 이에 대한 주의가 필요하다고 사료된다.

지중환경 내 지질 매체가 질산염의 탈질 반응에 미치는 영향에 대한 고찰

전지훈,이우춘,이상우,김순오 한국지하수토양환경학회 2020 지하수토양환경 Vol.25 No.특별호

Nitrate contamination has received much attention at local as well as regional scales. The domestic situation is not out ofexception, and it has been reported to be very serious, particularly within agricultural areas as a result of excessive usageof nitrogen fertilizers. Meanwhile, nitrate can be naturally attenuated by denitrification in subsurface environments. Thedenitrification occurs through biotic (biological) and abiotic processes, and numerous previous studies preferentiallyfocused the former. However, abiotic denitrification seems to be significant in specific environments. For this reason, thisstudy reviewed the previous studies that focused on abiotic denitrification processes. Firstly, the current status of nitratecontamination in global and domestic scales is presented, and then the effect of geological media on denitrification isdiscussed while emphasizing the significance of abiotic processes. Finally, the implications of the literature review arepresented, along with future research directions that warrant further investigations. The results of previous studiesdemonstrated that several geological agents could play a vital role in reducing nitrate. Iron-containing minerals such aspyrite, green rust, magnetite, and dissolved ferrous ion are known to be powerful electron donors triggering denitrification. In particular, it was proven that the rate of denitrification by green rust was comparative to that of biologicaldenitrification. The results indicate that abiotic denitrification should be taken into account for more accurate evaluation ofdenitrification in subsurface environments.

공동체 인식과 행복의 영향관계 분석

전지훈,정문기 한국정책분석평가학회 2016 한국정책분석평가학회 학술대회발표논문집 Vol.2016 No.3

지역의 공동체활동과 문화 및 지역발전과의 관계에 대한 연구

전지훈,최문형,정문기 한국정부학회 2015 한국행정논집 Vol.27 No.1

본 연구는 문화를 통한 지역발전전략에 있어서 지역의 공동체 활동이 지역문화를 형성과 지역발전을 견인하여 지역공동체에 기여한다는 순환적 연관관계를 규명하고자 하였으며, 이를 위해 코인스트리스, 나가하마, 삼덕동을 대상으로 사례분석을 실시하였다. 분석결과 이론적 모형으로 제시한 연관 관계의 다양한 맥락적 모습을 관찰할 수 있었다. 사례분석결과는 다음과 같다. 우선, 지역공동체 활동이 실제로 지역문화발전의 기반을 제공하였다. 둘째, 공동체활동은 독특한 지역문화전략을 형성하였다. 셋째, 공동체활동과 문화전략은 지역의 경제발전을 견인하였다. 넷째, 지역발전의 성과는 공동체성 강화로 순환관계를 보이고 있었다. 이와같은 사례분석에 대한 시사점은 다음과 같다. 첫째, 지역성 및 주민들간 상호교류와 연대감 같은 공동체성 함양이 중요하다. 둘째, 지역 유무형의 자산을 적극적으로 활용해야 한다. 셋째, 공동체성 확립과 지역문화 발전의 효과적 추진을 위해서 주민조직의 힘이 필요하다. 마지막으로, 지속가능한 공동체를 위해 공동체중심의 지역사업 활성화가 요구된다.

원전 해체 콘크리트 폐기물의 재활용에 대한 고찰

전지훈,이우춘,이상우,김순오,Jeon, Ji-Hun,Lee, Woo-Chun,Lee, Sang-Woo,Kim, Soon-Oh 대한자원환경지질학회 2021 자원환경지질 Vol.54 No.2

Globally, nuclear-decommissioning facilities have been increased in number, and thereby hundreds of thousands of wastes, such as concrete, soil, and metal, have been generated. For this reason, there have been numerous efforts and researches on the development of technology for volume reduction and recycling of solid radioactive wastes, and this study reviewed and examined thoroughly such previous studies. The waste concrete powder is rehydrated by other processes such as grinding and sintering, and the processes rendered aluminate (C3A), C4AF, C3S, and ��-C2S, which are the significant compounds controlling the hydration reaction of concrete and the compressive strength of the solidified matrix. The review of the previous studies confirmed that waste concretes could be used as recycling cement, but there remain problems with the decreasing strength of solidified matrix due to mingling with aggregates. There have been further efforts to improve the performance of recycling concrete via mixing with reactive agents using industrial by-products, such as blast furnace slag and fly ash. As a result, the compressive strength of the solidified matrix was proved to be enhanced. On the contrary, there have been few kinds of researches on manufacturing recycled concretes using soil wastes. Illite and zeolite in soil waste show the high adsorption capacity on radioactive nuclides, and they can be recycled as solidification agents. If the soil wastes are recycled as much as possible, the volume of wastes generated from the decommissioning of nuclear power plants (NPPs) is not only significantly reduced, but collateral benefits also are received because radioactive wastes are safely disposed of by solidification agents made from such soil wastes. Thus, it is required to study the production of non-sintered cement using clay minerals in soil wastes. This paper reviewed related domestic and foreign researches to consider the sustainable recycling of concrete waste from NPPs as recycling cement and utilizing clay minerals in soil waste to produce unsintered cement.

습식저장조에서의 사용후핵연료 부식 건전성 평가

전지훈,김소영,신혜인,이성기 한국방사성폐기물학회 2016 한국방사성폐기물학회 학술논문요약집 Vol.2016 No.05

우리 이마에 달린 뿔

전지훈 경남대학교 극동문제연구소 2013 통일전략포럼보고서 Vol.53 No.-

기술-제품-산업 연관도를 이용한 기술경로의 사례조사 - CDRS 미활용 에너지 이용 기술 -

전지훈,안은녕,허은녕 한국에너지학회 2003 한국에너지공학회 학술발표회 Vol.2003 No.-