Immobilization mechanism of Pb in fly ash-based geopolymer

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• 作者：Bin Guo^a ; De'an Pan^a ; ^{pandean@mater.ustb.edu.cn} ; Bo Liu^a ; Alex A. Volinsky^b ; Mustafa Fincan^b ; Jinfeng Du^c ; Shengen Zhang^a ; ¹ ; ^{zhangshengen@mater.ustb.edu.cn}
• 关键词：Lead ; Leaded geopolymer ; Immobilization mechanism ; Chemical property
• 刊名：Construction and Building Materials
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：134
• 期：Complete
• 页码：123-130
• 全文大小：1813 K
• 卷排序：134

文摘

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.