Mercury-contaminated solid wastes and soil are difficult to be stabilized due to the high volatility, high mobility and toxicity of mercury. Two kinds of salty mud with different mercury concentration from a Chlor-alkali factory were used for a bench scale stabilization test in order to assess the effects of three reagents. The results show that reagents MetaFix I-10 and calcium polysulfide are proved to be effective in treating the samples: the sample with total mercury content of 663.5 mg/kg was decreased below class III standard limited level of Quality standard for ground water with 0.5%(mass ratio) reagent MetaFix I-10 and calcium polysulfide. The treatment with 0.5%(mass ratio) reagent MetaFix I-10 or 1 % reagent calcium polysulfide could decrease the concentration of mercury of the sample with the total mercury content of 1012 mg/kg below class III standard limited level of Quality standard for ground water. This study could provide theoretical basis and technical support for further study of remediation of mercury contaminated solid wastes and soil.%含汞固废和污染土壤因其中汞的强挥发性、高迁移性和高毒性的特点使得其稳定化技术面临着挑战.通过对药剂稳定化的研究,对比分析采用3种不同的稳定化药剂处理某氯碱厂两种不同浓度含汞盐泥的处理效果.研究表明,药剂MetaFix I-10和多硫化钙对高浓度含汞盐泥的处理效果比较理想:在0.5%的质量投加比条件下,药剂MetaFix I-10和多硫化钙均可使总汞浓度为663.5 mg/kg的样品的汞浸出浓度降低至1μg/L的《地下水质量标准》(GB/T 14848-93)中的III类标准限值;质量投加比分别为0.5%的MetaFix I-10药剂和1%的多硫化钙药剂均能使总汞浓度为1012 mg/kg的样品中汞的浸出浓度降至1μg/L.本研究可为含汞固废和土壤的稳定化修复提供理论依据和技术支持.
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