• Title/Summary/Keyword: geosciences

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Study on physical properties of electric arc furnace stainless slag for recycling as concrete ahhregate (콘크리트 골재로서의 재활용을 위한 전기로 스테인레스 슬래그의 물성 평가)

  • You, Kwang-Suk;Han, Gi-Chun;Um, Nam-Il;Ahn, Ji-Whan
    • Proceedings of the Korean Institute of Resources Recycling Conference
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    • 2005.10a
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    • pp.236-239
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    • 2005

  • 본 연구에서는 콘크리트 잔골재 대체 골재로써의 재활용을 위한 재강슬래그의 특성을 조사하였다. 화학조성과 중금속 용출, 재강슬래그의 soundness 및 모르타르의 압축강도를 측정하였다. 그 결과, 중금속 용출과 soundness는 한국 산업 기준(Korean Industrial Standard)과 한국 환경 기준(Korean Environmental Limit)에 적합하였다. 모르타르의 압축 강도는 재강슬래그의 대체 비율이 커질수록 증가하였다.

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Carbonic Anhydrase Mimicry for Carbon Dioxide Fixation and Calcium Carbonate Mineralization (탄산탈수효소 모사를 이용한 이산화탄소 고정화 및 탄산칼슘 합성)

  • Sahoo, Prakash C.;Jang, Young Nam;Chae, Soo Chun;Lee, Seung Woo
    • Particle and aerosol research
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    • v.9 no.4
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    • pp.201-208
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    • 2013

  • Copper (II) and Nickel (II) mimic complexes of enzyme carbonic anhydrase were evaluated under ambient condition for carbon dioxide capture and conversion process. The synthesized complexes were characterized by ATR-FTIR and UV-DR spectroscopy. It was found that all the complexes have biomimetic activity towards $CO_2$ using para-nitrophenyl acetate (p-NPA) hydrolysis as the model reaction. Interestingly, the proper geometry obtained by the restricted orientation of tripodal N atoms in Cu (II) complex of 2,6-bis(2-benzimidazolyl) pyridine showed the highest activity (1.14 au) compared to others. The $CO_2$ bio-mineralization to $CaCO_3$ was carried out via in-vitro crystallization approach. Results indicate that the biomimetic complexes have a role in determining $CaCO_3$ morphology. The present observations establish a qualitative insight for the design of improved small-molecule catalysts for carbon capture.

  • https://doi.org/10.11629/jpaar.2013.9.4.201 인용 KSCI