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      MgO 기반 고화제를 이용하여 처리한 중금속 오염 준설토의 고형화/탄산염화 특성 = Characteristics of Solidification/Carbonation in the Heavy-Metal-Contaminated Sediment Treated by MgO-Based Binder

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      https://www.riss.kr/link?id=A101661909

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      다국어 초록 (Multilingual Abstract)

      A novel MgO-based binder was developed and applied to treat the anoxic sediment that was collected from Seonakdong river, Korea and was contaminated with heavy metals. The treated sediment was evaluated by measuring compressive strength, expansion, leaching of heavy metals and storage characteristics for $CO_2$. Initially, an optimal blending ratio of lime (L)/fly ash (FA)/blast furnace slag (BFS) that was to be mixed with MgO was screened to be $L_{0.3}-FA_{0.1}-BFS_{0.6}$. Long-term strengths of the sediments that were treated by various mixtures of MgO and $L_{0.3}-FA_{0.1}-BFS_{0.6}$ were then evaluated and the blending ratios between 4 : 6 and 6 : 4 were found optimal, which yielded a compressive strength of 4.09 MPa. On this basis, the optimal MgO-based binder was selected to be a 5 : 5 mixture of MgO and $L_{0.3}-FA_{0.1}-BFS_{0.6}$. The good performance of the MgO-based binder was believed to be due to the formation of Mg $(OH)_2$, which filled the micropores and also increased the density of the solidified matrices. The MgO-based binder exhibited an average stabilizing capacities for heavy metals of 92.9%, which was similar to or higher than that of Portland cement. It was found that 69.1 kg of carbon dioxide could be sequestrated after 365 days of curing when treating a ton of anoxic sediments.
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      A novel MgO-based binder was developed and applied to treat the anoxic sediment that was collected from Seonakdong river, Korea and was contaminated with heavy metals. The treated sediment was evaluated by measuring compressive strength, expansion, le...

      A novel MgO-based binder was developed and applied to treat the anoxic sediment that was collected from Seonakdong river, Korea and was contaminated with heavy metals. The treated sediment was evaluated by measuring compressive strength, expansion, leaching of heavy metals and storage characteristics for $CO_2$. Initially, an optimal blending ratio of lime (L)/fly ash (FA)/blast furnace slag (BFS) that was to be mixed with MgO was screened to be $L_{0.3}-FA_{0.1}-BFS_{0.6}$. Long-term strengths of the sediments that were treated by various mixtures of MgO and $L_{0.3}-FA_{0.1}-BFS_{0.6}$ were then evaluated and the blending ratios between 4 : 6 and 6 : 4 were found optimal, which yielded a compressive strength of 4.09 MPa. On this basis, the optimal MgO-based binder was selected to be a 5 : 5 mixture of MgO and $L_{0.3}-FA_{0.1}-BFS_{0.6}$. The good performance of the MgO-based binder was believed to be due to the formation of Mg $(OH)_2$, which filled the micropores and also increased the density of the solidified matrices. The MgO-based binder exhibited an average stabilizing capacities for heavy metals of 92.9%, which was similar to or higher than that of Portland cement. It was found that 69.1 kg of carbon dioxide could be sequestrated after 365 days of curing when treating a ton of anoxic sediments.

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      참고문헌 (Reference)

      1 강화영, "알칼리활성 플라이 애쉬 시멘트-콘크리트의 산저항성 및 내구성" 대한환경공학회 30 (30): 61-68, 2008

      2 황경엽, "낙동강 퇴적물 내 중금속 존재 형태 및 용출 가능성" 대한상하수도학회 21 (21): 113-122, 2007

      3 Liska, M., "Ultra-green construction: reactive magnesia masonry products" 162 (162): 185-196, 2009

      4 USEPA, "Toxicity Characterization Leaching Procedure (TCLP)" U.S. Environmental Protection Agency 1990

      5 Torres-Rodrguez, D.A., "Thermokinetic analysis of the MgO surface carbonation process in the presence of water vapor" 516 : 74-78, 2011

      6 Canfield, D. E., "The use of chromium reduction in the analysis of reduced inorganic sulfur in sediments and shales" 54 : 149-155, 1986

      7 Kumari, L., "Synthesis, characterization and optical properties of Mg(OH)2 micro-/nanostructure and its conversion to MgO" 35 : 3355-3364, 2009

      8 Xing, Z., "Synthesis of MgCO3 microcrystal sat160 starting from various magnesium sources" 64 : 1401-1403, 2010

      9 Schneider, M., "Sustainable cement production-present and future" 41 : 642-650, 2011

      10 Gao, P., "Production of MgO-type expansive agent in dam concrete by use of industrial by-products" 43 : 453-457, 2008

      1 강화영, "알칼리활성 플라이 애쉬 시멘트-콘크리트의 산저항성 및 내구성" 대한환경공학회 30 (30): 61-68, 2008

      2 황경엽, "낙동강 퇴적물 내 중금속 존재 형태 및 용출 가능성" 대한상하수도학회 21 (21): 113-122, 2007

      3 Liska, M., "Ultra-green construction: reactive magnesia masonry products" 162 (162): 185-196, 2009

      4 USEPA, "Toxicity Characterization Leaching Procedure (TCLP)" U.S. Environmental Protection Agency 1990

      5 Torres-Rodrguez, D.A., "Thermokinetic analysis of the MgO surface carbonation process in the presence of water vapor" 516 : 74-78, 2011

      6 Canfield, D. E., "The use of chromium reduction in the analysis of reduced inorganic sulfur in sediments and shales" 54 : 149-155, 1986

      7 Kumari, L., "Synthesis, characterization and optical properties of Mg(OH)2 micro-/nanostructure and its conversion to MgO" 35 : 3355-3364, 2009

      8 Xing, Z., "Synthesis of MgCO3 microcrystal sat160 starting from various magnesium sources" 64 : 1401-1403, 2010

      9 Schneider, M., "Sustainable cement production-present and future" 41 : 642-650, 2011

      10 Gao, P., "Production of MgO-type expansive agent in dam concrete by use of industrial by-products" 43 : 453-457, 2008

      11 Shin, W.S., "Preliminary Monitoring of River and Lake Sediments(II)" Korean Ministry of Environment 2009

      12 Liska, M., "Performance of magnesia cements in pressed masonry units with natural aggregates: Production parameters optimisation" 22 : 1789-1797, 2008

      13 Kasselouris, V., "On the hydration of MgO in cement pastes hydrated up to 8 years" 15 : 758-764, 1985

      14 Puertas, F., "Mineralogical and microstructural characterisation of alkali-activated fly ash/slag pastes" 25 : 287-292, 2003

      15 Duchesne, J., "Lime treatment of fly ash: characterization of leachate composition and solid/water reactions" 19 (19): 221-231, 1999

      16 Xu, H., "Geopolymerisation of multiple minerals" 15 : 1131-1139, 2002

      17 Van Jaarsveld, J. G. S., "Factors affecting the immobilization of metals in geopolymerised FA" 29 : 283-291, 1998

      18 Gerdemann, S. J., "Ex situ aqueous mineral carbonation" 41 : 2587-2593, 2007

      19 Camargo Valero, M. A., "Enhanced phosphorus removal in a waste stabilization pond system with blast furnace slag filters" 4 : 122-127, 2009

      20 Mo, L., "Effects of accelerated carbonation on the microstructure of Portland cement pastes containing reactive MgO" 42 : 769-777, 2012

      21 Rothon, R. N., "Effects of Particulate Fillers on Flame Retardant Properties of Composites, In Particulate Filled Polymer Composites, 2nd ed." Rapra Technology Ltd 263-302, 2003

      22 Hwang, K. -Y., "Effect of resuspension on the release of heavy metals and water chemistry in anoxic and oxic sediments" 39 (39): 908-915, 2011

      23 USEPA, "Contaminated Sediment Remediation Guidance for Hazardous Waste Site" Office of Solid Waste and Emergency Response 2005

      24 Rodrigues, F.A., "Cement industry: sustainability, challenges and perspectives" 9 : 151-166, 2011

      25 Worrell, E., "Carbon dioxide emissions from the global cement industry" 26 : 303-329, 2001

      26 Wunder, B., "Antigorite: Pressure and temperature dependence of polysomatism and water content" 13 : 485-495, 2001

      27 Allen, H. E., "Analysis of acid-volatile sulfide (AVS) and simultaneously extracted metals (SEM) for the estimation of potential in aquatic sediments" 12 : 1441-1453, 1993

      28 Hossein, R., "Alkali Ash Material: A novel fly Ash-based cement" 37 (37): 3454-3457, 2003

      29 Maroto-Valer, M. M., "Activation of magnesium rich minerals as carbonation feedstock materials for CO2 sequestration" 86 : 1627-1645, 2005

      30 Vandeperre, L.J., "Accelerated carbonation of reactive MgO cements" 19 : 67-79, 2007

      31 Lee, N.J., "A Survey of Contamination in the West-Nakdong River Basin and Establishment of a Water Quality Improvement Program" Korean Ministry of Environment 2009

      32 Lee, C.-H., "A Study on the Development of Environmental Standards for Sediments" Korea Environment Institute 2000

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      2026 평가예정 재인증평가 신청대상 (재인증)
      2020-01-01 평가 등재학술지 유지 (재인증) KCI등재
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      2000-07-01 평가 등재후보학술지 선정 (신규평가) KCI등재후보
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      기준연도 WOS-KCI 통합IF(2년) KCIF(2년) KCIF(3년)
      2016 0.3 0.3 0.35
      KCIF(4년) KCIF(5년) 중심성지수(3년) 즉시성지수
      0.35 0.36 0.568 0.05
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