Study on the Improvement Effect of Steel Slag Micro Powder on Heavy Metal Polluted Soil
The remediation effect of steel slag fine powder on soil contaminated by heavy metals(Cu2+and Cr6+)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 Cu2+and Cr6+in the contaminated soil.Furthermore,XRD,FTIR,and SEM analyses were conducted to elucidate the mechanism of Cu2+and Cr6+immobilization by steel slag micro-powder.The results indicated that solidification of Cu2+and Cr6+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.
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