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하수차집관로 준설토양의 콘크리트골재 적용성 평가에 관한 연구
김준하,김형욱,김인식,이재영,Kim, Joon-Ha,Kim, Hyeong Wook,Kim, In-Sik,Lee, Jai-Young 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.2
Recently, the gap between demand and supply of natural aggregate has increased owing to the depletion of aggregate sources. Therefore, policy support is necessary for the stable supply of aggregate resources. Public and construction works experience problems when they do not receive a steady supply of aggregate. Further, instabilities in aggregate supply lead to increases in aggregate prices, and consequently construction costs. As a result, the likelihood of poor construction using low-grade aggregate increases. It is therefore crucial to put measures in place that deal with these issues. This study aims to reduce the load imposed by aggregate use on the environment by recycling soil dredged from sewage ducts to reduce the gap between supply and demand of fine aggregate. The dredged soil is assessed using an applicability test for quality characteristics and solidification with basic properties. This study aims to secure the safety of dredging soil and solidified objects through interior physical and chemical analyses and to utilize it as a base material for concrete solidification in the future.
멕시코 B 광산 슬러지에 존재하는 생물학적 광물화 미생물의 특성에 관한 연구
김준하,윤성열,박윤수,이재영,Kim, Joon-Ha,Yun, Seong-Yeol,Park, Yoon Soo,Lee, Jai-Young 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.2
Microbial processes that bind heavy metals and form minerals are widespread, and they represent a basic aspect of biogeochemistry. Some microorganisms can crystallize minerals by secreting a specific enzyme. In particular, calcite ($CaCO_3$) precipitation is an important part of biomineralization, and has been studied extensively because of its wide application in civil engineering technology. This process provides an effective way to stabilize heavy metals within a relatively stable crystal phase. In this study, biomineralization of calcite by three urea-hydrolyzing indigenous bacterial strains was investigated by microbiological analyses. Three bacterial strains were isolated from the sludge of B mine in Mexico and each bacterial strain was identified by the cellular fatty acid composition and 16S rRNA partial sequencing analysis. The results of the identification analysis showed that these strains were closest to Sporosarcina pasteurii, Kurthia gibsonii, and Paenibacillus polymyxa. We found that the optimum conditions for growth of these indigenous bacteria were $30-40^{\circ}C$ and pH range of 7-8. Microbiological analyses showed the possibility that the bioaccumulated heavy metals ions were deposited around the cell as crystalline carbonate minerals under the optimum conditions. The findings of our study suggest that the indigenous bacterial strains play an important role in heavy metal immobilization.
김준하(Joon-Ha Kim),Tsogbadrakh Munkhtogtokh,이재영(Jai-Young Lee) 한국토목섬유학회 2011 한국토목섬유학회 학술발표회 Vol.2011 No.4
There are 936 metal mines abandoned in Korea. The environmental problems such as heavy metal from adits etc. and the subsidence has occurred in the abandoned metal mines. In addition, soil has been contaminated by tailings. The objective of this study is to assess leaching of heavy metals and mine reclamation proposal in contaminated soil of abandoned metal mimes.
폐기물 매립지의 침출수 집배수 및 보호층으로서 Geo-Multicell-Composite의 적용가능성에 관한 연구
김준하(Joon-Ha Kim),정성훈(Sung-Hoon Jung),이재영(Jai-Young Lee) 한국토목섬유학회 2012 한국토목섬유학회 학술발표회 Vol.2012 No.4
The objective of thin study is the drainage functions of leachate and protection functions of the geomembrane in order to examine the application possibilities of Geo-Multicell-Composite as a Leachate Collection·Removal and Protection System(LCRPs). This research is conducted to measure the permeability the steep slope in landfill. As the results, the GMC has a proper permeability as a LCRPs in landfill.
김준하(Joon Ha Kim),송태정(Tae Jung Song),김종빈(Jong Bin Kim) 위기관리 이론과 실천 2022 Disastronomy Vol.5 No.2
최근 전 세계적으로 기후변화 문제가 발생하면서 자연재난의 피해가 점차 대형화, 다양화되고 있다. 효율적인 재난 대응을 위해 재난관리자원의 효율적 분배 및 운영은 재난복구에 있어 매우 중요한 사안이다. 재난 발생 시 신속한 지원을 위해서 지자체에서 적정량의 재난관리자원을 비축해야 하나, 너무 과도하게 보유할 경우, 관리를 위한 비용이 많이 들고, 적게 보유하면 재난 상황 시 효과적인 대처가 곤란하다. 이를 위해 정부에서는 재난관리자원의 효율적 운영을 연구해왔다. 2014년부터 행정안전부는 재난관리자원 공동활용시스템(DRSS, Disaster Resource Sharing Service)을 개발하여 부서별로 운영되던 재난 관리 시스템을 하나의 업무포털로 통합하여 협업할 수 있도록 하였다. DRSS를 통해 재난관리자원의 현황을 파악하여 재난발생 시 그에 따른 대응이 가능하게 되었다. 그러나, DRSS는 기본적인 데이터 수집 및 단순 분석을 주로 수행하고 있어, 운영에 대한 검토와 분석이 필요하며, 각 지역의 재난 특성을 고려해야 한다. 이에 본 고에서는 현재 본 기관이 수행하고 있는 재난 유형별, 적정 수량 재고 통합관리 시스템 구축 및 비축기준 마련을 위한 기술을 개발하는 ‘재난관리자원 효율적 운영·관리 기술개발’ 연구과제를 소개하고자 한다. Recently, as climate change problems occur around the world, the damage of natural disasters is gradually increasing and diversifying. For efficient disaster response, the efficient distribution and operation of disaster resources is a very important issue in disaster recovery. Local governments should stock up on appropriate disaster resources for rapid support in the event of a disaster, but if they have too much, they are expensive to manage, and if they have less, it is difficult to deal effectively in a disaster situation. To this end, the government has studied the efficient operation of disaster resources. Since 2014, the Ministry of Public Administration and Security has developed a Disaster Resource Sharing Service(DRSS) to integrate the disaster management system operated by each department into a single business portal for collaboration. Through DRSS, it is possible to grasp the current status of disaster resources and respond accordingly in the event of a disaster. However, DRSS mainly performs basic data collection and simple analysis, so it is necessary to review and analyze the operation, and consider the disaster characteristics of each region. Therefore, this paper introduces the “Development of technology for efficient operation and management of disaster resources” research project to develop technologies for establishing an integrated inventory management system and establishing stockpiling standards for each type of disaster.