钢渣微粉用于重金属污染土壤固化剂实验研究  

Experimental Study of Steel Slag Powder as Solidified Agent to Heavy Metal Contaminated Soil

作　　者：朱李俊 王磊[2] 程东波[1,3] 刘国威[1] 龙涛[2] 金强[1] 

机构地区：[1]中冶宝钢技术服务有限公司,上海200942 [2]国家环境保护土壤环境管理与污染控制重点实验室(环境保护部南京环境科学研究所),南京210042 [3]同济大学经济与管理学院,上海200092

出　　处：《硅酸盐通报》2016年第7期2281-2286,共6页Bulletin of the Chinese Ceramic Society

基　　金：环保公益性行业科研专项(201009015-4);中央级公益性科研院所基本科研业务专项

摘　　要：采用正交试验法研究了钢渣微粉固化剂对重金属污染土壤的修复效果。原土经过固化处理后,Cr、Ni、Cu、Zn和Pb的浸出浓度大大降低,浸出浓度普遍下降了99%以上,但掺量、时间、固液比、钢渣微粉比例对重金属的浸出浓度呈现了不同的影响,浸出浓度结果证明了钢渣粉除了具有胶凝性的特征外,其多空性和富含碳酸盐、铁锰氧化物等特点能够使其具有更加优越的固化效果。同时,经过处理后的固化体无侧限抗压强度可达2.4 MPa以上,且与时间、掺量具有良好的相关性,但钢渣微粉比例的增加能够一定程度降低固化体的前期强度。Repairing effect of heavy metal contaminated soil using steel slag powder as the curing agent was conducted by orthogonal test methods. Leaching concentration of Cr, Ni, Cu, Zn and Pb were generally decreased by more than 99% after curing treatment of the original soil, but the dosage, time, solid-liquid ratio, the ratio of steel slag powder presented different effects to leaching concentration of heavy metals. The results proved that the steel slag powder not only had gelation properties characteristics, but also porosity and rich in carbonates, Fe-Mn oxides, etc. Thus it was possible to had a more excellent curing effect. Meanwhile, unconfined compressive strength of cured treatment body could up to 2.4 MPa or more, and had a good correlation with time and dosage, however, with the hence of proportion of steel slag powder, early strength of the cured body could reduced in some extent.

关 键 词：钢渣微粉 固化 水泥 浸出毒性 无侧限抗压强度 

分 类 号：X53[环境科学与工程—环境工程] X756