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| 高炉渣基矿物聚合材料的制备及其对铅离子的固定 | |
| 引用本文： | 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其对铅离子的固定[J].现代地质,2008,22(5). |
| 作者姓名： | 倪建娣 陈文燕 叶树峰 陈运法 |
| 作者单位： | 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;中国科学院,研究生院,北京,100080 2. 北京恒聚化工集团有限责任公司,研究所,北京,101109 3. 中国科学院过程工程研究所,多相反应重点实验室,北京,100080 |
| 基金项目： | 国家自然科学基金，科技部国家科技支撑计划项目 |
| 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+ |
Preparation and Pb2+ Immobilization Behaviors of Blast Furnace Slag Based Geopolymer |
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| NI Jian-di,CHEN Wen-yan,YE Shu-feng,CHEN Yun-fa.Preparation and Pb2+ Immobilization Behaviors of Blast Furnace Slag Based Geopolymer[J].Geoscience——Journal of Graduate School,China University of Geosciences,2008,22(5). | |
| Authors: | NI Jian-di CHEN Wen-yan YE Shu-feng CHEN Yun-fa |
| 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%. |
| Keywords: | Pb2 |
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