钢渣微粉对重金属污染土壤的改良效果研究  

Study on the Improvement Effect of Steel Slag Micro Powder on Heavy Metal Polluted Soil

作　　者：吴丽梅 马俊亮 唐宁[1] 潘文浩[1] WU Limei;MA Junliang;TANG Ning;PAN Wenhao(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168

出　　处：《山东化工》2024年第20期243-247,共5页Shandong Chemical Industry

摘　　要：研究了钢渣微粉对重金属(Cu^(2+)和Cr^(6+))污染土壤的修复效果,讨论了钢渣微粉掺量、粒径等的影响规律和机理,发现钢渣微粉对重金属污染土壤具有良好的修复效果,随着钢渣粒径的减小、比表面积的增大和土壤液固比的增大,土壤中Cu^(2+)和Cr^(6+)的浸出浓度减小。同时为揭示钢渣微粉对Cu^(2+)和Cr^(6+)的固化机理,利用XRD、FTIR和SEM对修复土壤样品进行分析测试,发现钢渣微粉对Cu^(2+)和Cr^(6+)的固化主要是通过钢渣的孔隙对其进行吸附,并通过钢渣水化产生的OH-与重金属离子结合形成沉淀来实现的,同时钢渣水化形成的C-S-H对重金属也有一定的包裹效果。The remediation effect of steel slag fine powder on soil contaminated by heavy metals(Cu^(2+)and Cr^(6+))was investigated in this study,with a discussion on the influence of steel slag fine powder content and particle size.It was observed that steel slag fine powder effectively reduced the leaching concentrations of Cu^(2+)and Cr^(6+)in the contaminated soil.Furthermore,XRD,FTIR,and SEM analyses were conducted to elucidate the mechanism of Cu^(2+)and Cr^(6+)immobilization by steel slag micro-powder.The results indicated that solidification of Cu^(2+)and Cr^(6+)by steel slag micro-powder primarily occurred through pore adsorption as well as precipitation formation via combination with OH-produced during hydration of steel slag.Additionally,C-S-H formed during hydration also contributed to encapsulation of heavy metals.

关 键 词：钢渣 土壤修复 重金属 固化机理 

分 类 号：X53[环境科学与工程—环境工程]