• 제목, 요약, 키워드: Recyclable

검색결과 188건 처리시간 0.037초

재활용 표시와 재생경로에 대한 이해 및 참여도 분석 (The Analysis of the recognition on recycling mark and method and the participation in recycling movement)

  • 구수정
    • 한국환경교육학회지:환경교육
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    • v.11 no.1
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    • pp.165-180
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    • 1998
  • The purpose of this study is to investigate how much people recognise and participate in wastes recycling and to give suggestions for systematic environmental education on the recycling. Subject's recognition degree on recycling mark which had been established by The Ministry of Environment in 1995 was very low and the recycling mark should be educated because it would help people consider the environmental factor when purchase goods which are recyclable or not. They acknowledged simple recycling methods of recyclable goods much but not the complex methods of them. So they need the systematic education on recycling method through which continuous participation of them would be arisen. In the while there is no mention about recycling mark in textbooks which are currently used in Korean elementary schools, middle schools and high schools. Not only the mark but also any kind of environmental information should be updated in environmental textbooks/learning materials to cultivate students environmental literacy to meet current environmental issues dynamically and solve environmental problems in the future successfully.

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친환경 배전급 전력케이블용 절연재료의 전기적 특성에 관한 연구 (I) (A Study on Electrical Properties of Insulating Materials for Eco-friendly Distribution Power Cables (I))

  • 이준호;김철호;조영철;이문석
    • 전기학회논문지
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    • v.66 no.3
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    • pp.551-556
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    • 2017
  • The cross-linked polyethylene(XLPE) has been most widely used for the power cable insulating layer because of its outstanding properties such as electrical and mechanical properties. However, XLPE is unrecyclable when disposed after replacement and demolishing because it becomes thermosetting through cross-linked process. Recently, because of growing social awareness of recycling and eco-friendly, there is growing need for the development of recyclable insulating materials that can replace XLPE. Therefore, the purpose of this study is to compare the electrical properties of XLPE and recyclable thermoplastic insulating materials. To this end, we compared and analyzed the electrical properties of XLPE and group N2 through AC breakdown test, accelerated water treeing test and accelerated life test(ALT).

펄프.제지산업의 환경적 특성과 대책 (Environmental Features and Actions of Pulp & Paper Industry)

  • 조준형
    • 펄프종이기술
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    • v.41 no.3
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    • pp.13-21
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    • 2009
  • Pulp and paper industry is a typical plant industry which usually consume lots of water and energy. Recently, environmental issues have become more important due to climate changes around the world, and reinforcement in the regulatory content in transfer and management of chemical material and that in environmental regulations for waste water and air. Paper industry is a source material recycle industry which recycle or reuse waste paper, recyclable wood, planned plantation or lumber from thinning and waste wood. Hence it can be said that paper industry is the representative industry for earth environment and of 21th century.

Characteristics of an HTS SMES for Solar Power System

  • Kim Woo-Seok;Lee Seung-wook;Hahn Song-yop
    • 한국초전도ㆍ저온공학회논문지
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    • v.7 no.2
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    • pp.44-46
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    • 2005
  • A SMES can be a perfect alternative energy storage device to the chemical batteries which are needed by most of the renewable energy supply systems. The chemical battery storage system is so expensive to maintain and causes another environmental problem because they are not recyclable. But, SMES has semi-permanent lifetime and no environmental problems cause it only need coolants which is non flammable, clean and recyclable gas. In order to verify the feasibility of a SMES for the renewable electrical power supply system, electrical characteristics of a test SMES coil with the photovoltaic power system were analyzed in this paper. Simulation results show that we can charge 40 amps of current in test SMES coil using solar power system. The experimental verification will be performed just after development of the peak power tracking system for the solar system.

Silica Supported Ammonium Acetate: An Efficient and Recyclable Heterogeneous Catalyst for Knoevenagel Condensation between Adehydes or Ketones and Active Methylene Group in Liquid Phase

  • Gupta, Raman;Gupta, Monika;Paul, Satya;Gupta, Rajive
    • Bulletin of the Korean Chemical Society
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    • v.30 no.10
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    • pp.2419-2421
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    • 2009
  • A simple and efficient method has been developed for Knoevenagel condensation between aldehydes or ketones and active methylene group by stirring in methylene chloride at 60 ${^{\circ}C}$ under heterogeneous conditions using silica supported ammonium acetate. The products are obtained in excellent yields and are in a state of high purity. The structures of the products were confirmed by IR, $^1H$ NMR and mass spectral data and comparison with authentic samples available commercially.

Facile Synthesis of Flower-like Superparamagnetic Fe3O4/BiOCl Nanocomposites as High Effective Magnetic Recyclable Photocatalyst under Visible Light

  • Wang, Wei;He, Mingyi;Zhang, Huan;Dai, Yatang
    • Journal of Magnetics
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    • v.21 no.2
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    • pp.179-182
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    • 2016
  • In this paper, 10 nm $Fe_3O_4$ nanoparticles were modified on the surface of $2{\mu}m$ flower-like bismuth oxychloride (BiOCl) spheres by a facile co-precipitation method. The results showed that the $Fe_3O_4/BiOCl$ nanocomposites exhibited excellent photocatalytic activity and superparamagnetic property ($M_s=3.22emu/g$) under visible light for Rhodamine B (RhB) degradation. Moreover, the $Fe_3O_4-BiOCl$ photocatalyst possessed magnetic recyclable property, which could maintain high photocatalytic effective even after 20 cycle times. These characteristic indicates a promising application for wastewater treatment.