• Journal of Korean Home Economics Education Association
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• v.17 no.4 s.38
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• pp.101-115
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• 2005

The purpose of this research was to develop and applicate In based teaching$\cdot$learning process plan for Environmentally friendly Housing. The 3 main stages of process were used: analyses, planning & development, and application & evaluation. Three teaching subjects were selected to teach Environmentally friendly housing in the analysis stage. The webhard learning environment was consisted of contents and various materials such as digital video, PPT, group activity, discussion, individual and group reporting forms, and questions. The number of 101 high school students participated for the application stage during september 22-27, 2003. Most of all students evaluated very positively the various aspects of contents as well as LT cooperative learning methods md the web based learning environment. They strongly expressed to practice the practical ways of Environmentally friendly housing learned in the class in the future. The results imply that the contents and In teaching learning plan developed in this study seem to be adequate to be included in the regular text.

• Korean Journal of Organic Agriculture
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• v.21 no.4
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• pp.753-767
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• 2013

Soil contamination has continuously increased worldwide, thus the remediation for the contaminated soils has risen steadily. However, the consideration of ecological safety for the remediated soils and their agricultural uses has been very limited. Therefore, this study was to investigate the influences of selected environmentally-friendly agricultural materials, organic by-product fertilizer (OF), charcoal (CC), and biochar (BC), as soil conditioners for improving poor chemical properties of fuel-oil removed soil by land farming technique. Two different remediated soils, remediated soil A (RSA) and remediated soil B (RSB), were selected. Soil texture of both RSA and RSB was sandy loam. The chemical properties of RSA and RSB were as follows: soil pHs of 8.5 and 8.7, soil organic matter contents of 7.4 and 5.5g $kg^{-1}$, total nitrogen contents of 0.26 and 0.10g $kg^{-1}$, available phosphorus concentrations of 7.2 and 4.4mg $kg^{-1}$, and exchangeable calcium concentrations of 14.8 and $11.7cmol_c$ $kg^{-1}$, respectively. Results of the properties were not reached for the optimal values for cultivating crops that were recommended by National Academy of Agricultural Science at Rural Development Administration in Korea. However, after applying OF, CC, and BC, the chemical properties of soils were selectively improved, which were that soil organic matter content and available phosphorus concentration increased, whereas the soil pH were not changed. In particular, the chemical properties were positively changed more with the application of 5.0% biochar. Thus, continuous management of the remediated soils with applying the eco-friendly agricultural materials can improve the quality of reme-diated soils.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.5
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• pp.1354-1358
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• 2008

Environmental-friendly nontocxic flame retardant paint which can overcomes the restriction of harmful materials for human body and environments such as Pb, Hg, Cd, $C^{+6}$, PBB/PBDE by EU and domestic Ministry of Environment was developed. Developed paint is the water-soluble organic inorganic hybrid material that VOC(volatility organic compound) discharge is low, and that human riskiness and environmental pollution is minimized not using the kinds of halogen materials. $Mg(OH)_2$, $Sb_{2}O_{3}$, and Zinc borate were used as flame retardant materials, 2% Micell and water were used as binder and solvent, respectively. Results showed the optimum activity was obtained when the ratio of those frame retardant agents($Mg(OH)_2$, $Sb_{2}O_{3}$, Zinc borate made by 1: 2: 2), binder(2% Micell) and water was 1: 0.5: 0.5.

• Journal of the Korean Wood Science and Technology
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• v.46 no.2
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• pp.189-201
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• 2018

Intumescent system is a highly effective flame retardant technology that takes advantage of the mechanism of foaming and carbonization. In order to materialize Intumescent system, it is necessary to use reinforcement material to improve the strength of the material. In this study, we used kenaf as a natural fiber to manufacture intumescent/EVA (ethylene vinyl acetate) composites to improve mechanical and flame retardant performance. Finally two materials with different particle shape are applied to one system. Therefore, the influence factors of the particles with different shapes on the composite material were analyzed based on the tensile test. For this purpose, we have used the tensile strength analysis model and confirmed that it can only act as a partial strength reinforcement due to weak binding force between the matrix and particles. In the combustion characteristics analysis using cone calorimeter and UL 94, the combustion characteristics were enhanced as the content of Intuemscent was increased. As the content of kenaf increased, combustion characteristics were strengthened and carbonization characteristics were weakened. Through the application of kenaf, it can be confirmed that elastic modulus improvement and combustion characteristics can be strengthened, which confirmed the possibility of development of environmentally friendly flame retardant materials.

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.5
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• pp.760-763
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• 2012

This study was conducted to investigate foliar treatment effects of organic agricultural materials for the environmentally-friendly cultivation of grape. The organic materials applied were chitosan, wood vinegar (pyroligneous acid), amino acid solution, and ginkgo leaf extract. All the organic materials were relatively strong acidic ranging lower than pH 4.6. when comparing with other organic materials, amino acid solution contained relatively high contents of selected plant nutrients, such as N, P, K, Ca, Mg, Cu, Fe, Mn, and Zn. As comparison of selected soil properties in the grape cultivating field, soil pH values were lower at the harvest stage than at the first stage of grape growing (before treating the organic materials), and electrical conductivity (EC) and soil organic matter content were higher at the harvest stage in the all plots. The concentrations of available phosphorus increased in most of the plot soils except in control plot (conventional treatment). The concentrations of exchangeable K decreased in the plot treated with ginkgo leaf extract and the control plot. The exchangeable Mg concentrations decreased in soils of all the plots. On the other hand, the concentrations of N and K in the grape leaves were higher with the treatments of chitosan and amino acid solution, P concentrations were higher with the applications of chitosan, wood vinegar and amino acid solution, and Ca and Mg concentrations were higher with chitosan and amino acid solution treatments, respectively, than with others. The yields of grape were higher, $1,581{\sim}1,583kg\;10a^{-1}$, in the control and wood vinegar treatment plots than others. Sugar contents of grape were not different among all the plots.

• Fibers and Polymers
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• v.6 no.3
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• pp.244-249
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• 2005

enVix is a novel regenerated cellulosic fiber, which is prepared from cellulose diacetate fiber using environmentally friendly manufacturing process. Vat dyeing properties of the enVix were investigated and compared with those ofregular viscose rayon. The enVix exhibited better dyeability than viscose rayon. The colour yields of vat dyes on the enVix were found to be dependent on dyeing temperature as well as the amount of levelling agent and salt. Good build-up and good to excellent fastness properties were obtained on the en Vix fabric.

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.434-435
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• 2009

최근 바이오매스를 친환경 소재로 활용하기 위한 연구개발 및 응용연구가 세계적으로 활발하게 진행되고 있다. 바이오매스를 기반으로 한 대표적인 친환경 소재는 바이오복합재료로서 현재 자동차의 내 외장재료로 사용되고 있으며 응용분야가 전자재료, 포장재료 등으로 다양하게 확대되고 있다. 바이오매스는 이산화탄소 흡수원일 뿐만 아니라 바이오매스를 이용한 바이오복합재료는 경량재료로서 자동차에 사용될 때 연비향상에 의해 이산화탄소 저감에 크게 기여할 수 있다. 최근에는 바이오매스를 기반으로 하여 고강도 특성 등 기존재료에 비해 우수한 특성을 가지는 나노소재를 제조하고 이를 다양한 에너지소재로 활용하기 위한 연구도 활발하게 진행되고 있다. 본 논문에서는 바이오매스를 기반으로 한 친환경 소재로서 바이오매스를 기반으로 한 바이오복합재료 및 친환경 나노소재의 연구동향 및 응용분야에 대해 소개하고자 한다.

• Proceedings of the IEEK Conference
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• 2001.10a
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• pp.621-627
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• 2001

Recycling of coal combustion by-product(Ash) are becoming more important in the utilization business as a result of the increased use of NOx reduction technologies at coal-fired power plants. current disposal methods of these by-products create not only a loss of profit for the power industry, but also environmental concerns that breed negative public opinion. Since inherent characteristics make these by-product suitable for building materials, several types of artificial aggregates and construction bricks are manufactured and tested to verify the engineering properties.

• 한국신재생에너지학회:학술대회논문집
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• 2008.10a
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• pp.77-78
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• 2008

최근 이산화탄소 흡수원으로 해조류의 배양과 이산화탄소 고정에 대한 영향 분석연구가 세계적으로 활발하게 진행되고 있다. 또한, 해조류에서 바이오에너지를 얻기 위한 연구와 해조류의 구성성분인 섬유, 당 및 지질을 이용하기 위한 연구도 다양하게 진행되고 있다. 해조류 섬유는 주로 종이 및 바이오복합재료 제조에 사용되며 추출물은 식품 등에 사용될 수 있다. 특히, 해조류 섬유는 셀룰로오스 섬유와 유사한 특성을 가지기 때문에 바이오복합재료의 천연섬유 보강재로서 사용이 가능하다. 바이오복합재료는 천연섬유를 보강재로 사용한 에너지절약과 친환경 특성을 가진 고분자복합재료로서 현재 자동차 및 건축물의 내장재로 사용되고 있는 유리섬유 보강 고분자복합재료를 대체할 수 있는 신소재이다. 본 논문에서는 해조류 기반 친환경 에너지소재의 세계적 연구동향 및 해조류 섬유를 이용한 신소재 개발연구로서 홍조류 섬유 보강 바이오복합재료에 대한 연구결과를 소개하고자 한다.

• Journal of the Korean Solar Energy Society
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• v.28 no.3
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• pp.21-26
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• 2008

Solar cells are renewable energy source which is not only environmentally friendly but also economically viable. For that matter, thin film materials are in observed with great in terest by a number of sources throughout the nations. Among these, CdTe (Cadium telluride) and CIS (copper indium diselenide) are the latest commercial products that are gathering attention in the solar cells markets. However there are some downsides to this newly invention. Since the materials are embedded, in the occasion of damage, certain amount of module residue can be released to water or soil. This paper outlines the results of our outdoor leaching experiments on photovoltaic (PV) samples broken into small fragments and been observed for 1 year.