碱激发胶凝材料固化Pb^(2+)及浸出毒性的试验研究  

Test Investigation on the Solidification of Heavy Metal(Pb^(2+)) by Alkali-activated Cementing Materials and Their Soaking Toxicity

作　　者：郑娟荣[1] 刘丽娜[1] 

机构地区：[1]郑州大学土木工程学院,郑州450002

出　　处：《硅酸盐通报》2009年第3期435-439,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(50572096)

摘　　要：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NH4+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28d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28d后已稳定。Test investigation on solidification of heavy metal （Pb^2＋） by alkali-activated cementing materials（ alkali-metakaolinite, alkali-slag, alkali-fly ash） and water-cement and their soaking toxicity were carried out in this paper, in which water-cement was as control sample. The results showed that alkali-activated cementing remarkably decreased Pb2＋ leaching concentration of the solidification bodies in the light of cement, the decreasing law were identical with law of capacity of NH4＋ ion exchange of the solidification bodies but were not related to the compressive strengths of solidification bodies materials; the heavy metal （ Pb^2＋ ） solidified by cement continues soaking out after curried 28 d while that solidified by the alkali-activated cementing materials is stable after curried 28 d.

关 键 词：碱激胶凝材料 固化重金属(Pb^2+) NH_4^+交换容量 抗压强度 浸出毒性 

分 类 号：O647.31[理学—物理化学]