Immobilization mechanism of Pb in fly ash-based geopolymer

被引：108

作者：

Guo, Bin ^{[1
]}

Pan, De'an ^{[1
]}

Liu, Bo ^{[1
]}

Volinsky, Alex A. ^{[2
]}

Fincan, Mustafa ^{[2
]}

Du, Jinfeng ^{[3
]}

Zhang, Shengen ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, 30 Xueyuan Rd, Beijing 100083, Peoples R China

[2] Univ S Florida, Dept Mech Engn, Tampa, FL 33620 USA

[3] Shenhua Guohua Elect Power Res Inst Co LTD, Ctr Technol Res, Beijing, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 134卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Lead; Leaded geopolymer; Immobilization mechanism; Chemical property; POTENTIAL USE; TOXIC METALS; PART II; LEAD; TECHNOLOGY; MATRICES; GLASSES; WASTE; SI-29; NMR;

D O I：

10.1016/j.conbuildmat.2016.12.139

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：123 / 130

页数：8

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