重金属在废弃粉煤灰-水泥固化体系内的迁移  

The Leaching Behaviors of Heavy Metals in the Solidification/Stabilization Matrix Contained Rejected Fly Ash Blended and Cement

作　　者：乔秀臣[1] 林宗寿[2] 寇世聪[2] 潘智生[3] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]香港理工大学土木系

出　　处：《武汉理工大学学报》2005年第10期11-14,共4页Journal of Wuhan University of Technology

基　　金：武汉理工大学硅酸盐材料工程教育部重点实验室开放课题基金(SYSJJ2004-09);武汉理工大学科学研究基金(XJJ2004020)

摘　　要：采用径向动态浸出实验(r-DLT)研究了含废弃粉煤灰-水泥固化/稳定样品内部重金属铅、铜、锌的氢氧化物的迁移行为,发现重金属在酸溶液作用下虽然会从样品内部向外迁移,但不同重金属的迁移规律各不相同。其中铅会在靠近固液界面的区域富集而不会及时进入外界浸出液,铜的富集区域远大于铅,锌基本不会富集而被直接浸出。在固化/稳定体系中添加Ca(OH)2可以有效阻碍锌的浸出。By means of radial Dynamic Leaching Test （r-DLT）, it was studied that the behaviors of heavy metal hydroxides in the solidified and stabilized （S/S） samples contained ccment and rejected fly ash. It was found that the heavy metals transferred from the inner part of samples to the solid-liquid interface during the leaching test. However, the lead accumulated in the area closed to the solid-liquid interface and was not removed from the .solid phase to the leaehant in time. The copper accumulated in a wider area than that of the lead. The results also showed that the zinc was easy to leach without accumulation, but adding Ca（OH）2 can retard this leaching.

关 键 词：废弃粉煤灰 固化 稳定 浸出 DLT 

分 类 号：TQ170.4[化学工程—硅酸盐工业]