高炉渣基矿物聚合材料的制备及对铅离子的固定

现代地质 ›› 2008, Vol. 22 ›› Issue (5): 852-856.

高炉渣基矿物聚合材料的制备及对铅离子的固定

倪建娣^1，2，陈文燕³，叶树峰¹，陈运法¹

1中国科学院过程工程研究所多相反应重点实验室,北京100080；
2中国科学院研究生院，北京100080；3北京恒聚化工集团有限责任公司研究所，北京101109

收稿日期:2008-04-03 修回日期:2008-08-10 出版日期:2008-10-20 发布日期:2009-11-12
通讯作者: 叶树峰，男，研究员，1966年出生，冶金反应工程专业，主要从事资源与材料化工的技术研究与开发工作。
作者简介:倪建娣，女，硕士研究生，1982年出生，化学工程专业，主要从事固体废弃物回收研究。 Email:jdni@home.ipe.ac.cn。
基金资助:
国家自然科学基金项目（500774073）；科技部国家科技支撑计划项目（2006BAC02A14）

Preparation and Pb²⁺ Immobilization Behaviors of Blast Furnace Slag Based Geopolymer

1Key Laboratory of Multiphase Reactions, Institute of Process Engineering, Chinese Academy of Sciences, Beijing100080, China; 2Graduate University of Chinese Academy of Sciences, Beijing100080, China;
3Research Department Institute,Beijing Hengju Oilfield Chemical Agent Co.,Ltd.,Beijing101109, China

Received:2008-04-03 Revised:2008-08-10 Online:2008-10-20 Published:2009-11-12

摘要/Abstract

摘要：

以高炉渣和煅烧高岭土为粉体原料，KOH溶液为激活剂，采用振动成型方法，在20 ℃下养护24 h，制备矿物聚合材料。实验样品静置固化28 d，采用压力试验机可测得其抗压强度高达24～65 MPa。矿物聚合材料制品在1 d、3 d、7 d、28 d的X射线衍射(XRD)、红外光谱(IR)等测试分析表明，高炉渣中的玻璃相在强碱的作用下发生溶解，之后形成Si、Al低聚体，最后形成各种晶体。采用矿物聚合材料可以有效地固定Pb2+。用含Pb²⁺的溶液配制矿物聚合材料，静置固化28 d，测其抗压强度以及 Pb²⁺溶出率。实验结果表明，Pb²⁺的存在降低了矿物聚合材料的1 d的抗压强度，但对7 d及28 d抗压强度没有影响，聚合材料对Pb²⁺固定率达到99.9%。

关键词: 矿物聚合材料, 高炉渣, 固定, Pb²⁺

Abstract:

Geopolymer, with good mechanical properties, was prepared using blast furnace slag(BFS) and calcinated kaolin clay. The synthesis tests of slag based geopolymer are done based on four different slag contents (20%, 40%, 60%, 80%),curing regime( 20 ℃) and curing time(1 d,3 d,7 d,28 d)The testing results showed that the geopolymer mortar containing 80% slag exhibited the highest mechanical strength in 28 d curing. The compressive strength of slag based geopolymer mortar is 65 MPa. Additionally, infrared(IR), Xray diffraction(XRD) techniques are used to characterize the microstructure of the slag based geopolymer paste. The analytical data indicated that significant depolymerization of the silicate or aluminosilicate networks occurred, then significant polymerization occurred. Immobilization behaviors of slag based geopolymer in presence of Pb²⁺also is carried out. The geopolymer was prepared by using Pb²⁺ solution,and the compressive strengths were tested in 28 d curing. The Pb²⁺ content had influenced on the development of compressive strength of geopolymer, but the compressive strength in 28 d did not change observably. The leaching tests were employed to investigate the immobilization behaviors of the slag based geopolymer. The leaching tests showed that the slag based geopolymer can effectively immobilize Pb²⁺content, and the immobilization rate reached 99.9%.

Key words: geopolymer, blast furnace slag, immobilization, Pb²⁺

中图分类号:

P579
TQ170.4

倪建娣陈文燕叶树峰陈运法. 高炉渣基矿物聚合材料的制备及对铅离子的固定[J]. 现代地质, 2008, 22(5): 852-856.

NI Jian-Di CHEN Wen-Yan XIE Shu-Feng CHEN Yun-Fa. Preparation and Pb²⁺ Immobilization Behaviors of Blast Furnace Slag Based Geopolymer[J]. Geoscience, 2008, 22(5): 852-856.

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[1]	聂轶苗，马鸿文，杨静，苏玉柱，李如臣，高飞. 矿物聚合材料固化过程中的聚合反应机理研究[J]. 现代地质, 2006, 20(2): 340-346.
[2]	苏玉柱，杨静，马鸿文，聂轶苗，李如臣. 利用粉煤灰制备高强矿物聚合材料的实验研究[J]. 现代地质, 2006, 20(2): 354-360.