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Construction & building materials v.134, 2017년, pp.123 - 130   SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Immobilization mechanism of Pb in fly ash-based geopolymer

Guo, Bin (Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, PR China ) ; Pan, De'an (Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, PR China ) ; Liu, Bo (Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, PR China ) ; Volinsky, Alex A. (Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA ) ; Fincan, Mustafa (Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA ) ; Du, Jinfeng (Center of Technology Research, Shenhua Guohua Electric Power Research Institute Co., LTD, PR China ) ; Zhang, Shengen (Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, PR China ) ;
  • 초록  

    Abstract Geopolymer possesses good immobilization capacity for Pb. There are two rival interpretations regarding the immobilization mechanism of Pb. This research investigates the behavior of 3 Pb compounds in geopolymer and clarifies the immobilization mechanism. When Pb contamination is added in the form, soluble in sodium hydroxide solution, the Pb is converted to an amorphous form and participates in the formation of geopolymer network. Successful immobilization of these species relies on chemical bonding and physical encapsulation. On the contrary, the Pb compound inert to sodium hydroxide solution is segregated from the binder and trapped by physical encapsulation. Highlights The behavior of Pb in geopolymer depends on the chemical property of the Pb compound. Pb participates in the formation of geopolymer network, forming leaded amorphous gel. Dissolution of lead compounds is a vital step in the formation of leaded geopolymer. Pb compounds, soluble in alkali, are chemically bonded into the geopolymer gel. PbS, inert to alkali, is trapped in the geopolymer by physical encapsulation.


  • 주제어

    Lead .   Leaded geopolymer .   Immobilization mechanism .   Chemical property.  

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