本文对碱激发胶凝材料(碱-偏高岭土、碱-矿渣和碱-粉煤灰)与水-水泥体系固化Pb2+进行了试验研究,其中水-水泥体系为对比样.结果表明:与水泥相比,碱激发胶凝材料能显著降低重金属离子(Pb2+)浸出浓度,其规律性与其NH+4交换容量大小的规律性一致,与其固化体的抗压强度的大小没有相关性;水泥固化重金属离子Pb2+在养护28 d后还不断浸出,而碱激发胶凝材料固化重金属离子Pb2+在养护28 d后已稳定.
参考文献
| [1] | Davidovits J .The ancient egyptian pyramids-concrete rock[J].Concrete International,1990,9(12):28-37. |
| [2] | Van Jaarsveld J G S;Van Deventer J S J .The potential use of seopolymeric materials to immobilise toxic metals(part Ⅰ.)[J].Minerals Engineering,1997,10(07):659-669. |
| [3] | Van Jaarsveld J G S;Van Deventer J S J .The potential use of genpolymeric materials to immobilise toxic metals(part Ⅱ.)[J].Minerals Engineering,1999,12(01):75-91. |
| [4] | Phair J W;Van Deventer J S J .Effect of silicate activator of pH on the leaching and material characteristics of waste-based characteristics of waste-based inorganic polymen[J].Minerals Engineering,2001,14(03):289-304. |
| [5] | 徐建中,周云龙,唐然肖.地聚合物水泥固化重金属的研究[J].建筑材料学报,2006(03):341-346. |
| [6] | 金漫彤,沈学优.土壤聚合物的制备及其固化重金属离子的研究[J].化工环保,2005(02):84-87. |
| [7] | 余振宝.沸石加工与应用[M].北京:化学工业出版社,2005:23. |
| [8] | GB 5086.2-1997.GB 5086.2-1997.危险废物鉴别标准-浸出毒性鉴别[S].北京:中国标准出版社,1997. |
| [9] | GB/T 15555.2-1995.GB/T 15555.2-1995.固体废物铜、锌、铅、隔的测定原子吸收分光光度法[S].北京:中国标准出版社,1995. |
| [10] | X.D.Li;C.S.Poon;H.Sun .Heavy metal speciation and leaching behaviors in cement based solidified/stabilized waste materials[J].Journal of hazardous materials,2001(3):215-230. |
| [11] | J. G. S van Jaarsveld;J. S. J van Deventer .Effect of the Alkali Metal Activator on the Properties of Fly Ash-Based Geopolymers[J].Industrial & Engineering Chemistry Research,1999(10):3932-3941. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%