The mining and smelting of vanadium deposit can cause heavy metal contamination of the soil, but there were few researches about remediation of vanadium deposit contaminated soil. Four kinds of iron-based liquid solidifying agents, including ferrous chloride, ferrous sulfate, ferric chloride, ferric sulfate, were added to the vanadium deposit contaminated soil for the stabilization of heavy metals. The results showed that the stabilization efficiency of the liquid iron-based agents on vanadium was high reaching 100.00% in 7 days. The optimal dosage of the agents was 0.5wt% m/m, and the most effective agent was ferrous sulfate. The efficiency was still high by 120 days. The ferrous agents were also effective in the stabilization of chromium. The ferrous chloride showed a stable stabilization efficiency of about 98.0% by 120 days. Because of the influence of pH, excess agents increased the leaching of Cd, Zn, Cu in 15 days. The leaching concentration decreased over time and was similar to the soil without stabilization at day 120.%选用FeCl2、FeCl3、FeSO4、Fe2(SO4)3共4种液态铁基稳定剂,对钒矿污染的土壤中的V等重金属进行了固化稳定化.结果表明,铁基液态稳定剂对V的稳定化效果良好,稳定化7d后最佳稳定效率均可达到100.0%,稳定剂的最佳用量为0.5wt%,最佳稳定剂为FeSO4,120d内效果良好.亚铁盐可对Cr实现稳定化,120d内稳定化效果稳定,FeCl2的稳定效率稳定在98.0%左右.由于对pH的影响,过量铁基液态稳定剂会在15d内促进Cd、Zn、Cu的浸出,之后浸出浓度逐渐降低,120d后,与未稳定化土样浸出浓度类似.
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