In this study, stabilization/solidification of electric arc furnace dust and Pb-refining dust was investigated. Stabilization of both wastes was performed by mixing each raw waste with MgO, Portland cement, MgO with MgCl₂ (magnesium oxychloride cement), and MgO with phosphate salts (magnesium phosphate cement), at ratios between 5 and 25 wt%. Stabilization/solidification processes were evaluated using EN 12457-4 standard leaching test and stabilized wastes were classified according to the 2003/33/EC Decision. Leachates of stabilized electric arc furnace dust with magnesium oxychloride and magnesium phosphate cement at 10 wt% and 5 wt%, respectively, presented lower concentrations than the regulation limits for disposal in non-hazardous waste landfills; however, the stabilized electric arc furnace dust using MgO or Portland cement at 25 wt% cannot be disposed in hazardous waste landfills. Stabilized Pb-refining dust using MgO or Portland cement at 25 wt% can be disposed of in hazardous waste landfills, whereas stabilized Pb-refining dust with magnesium oxychloride and magnesium phosphate cement at 20 wt% is suitable for disposal in non-hazardous waste landfills. The efficiency of magnesia cements stabilization is attributed to regulation of pH at 10–11, where metal solubility is diminished and positive surface charge of hydrolyzed MgO products results in high adsorption of metalloids oxy-anions.

在这项研究中，对电弧炉粉尘和Pb精炼粉尘的稳定/固化进行了研究。通过将每种原废料与MgO，波特兰水泥，MgO和MgCl ₂混合来稳定两种废料（氯氧化镁水泥）和含磷酸盐的MgO（磷酸镁水泥），比例为5至25 wt％。使用EN 12457-4标准浸出测试评估稳定/固化过程，并根据2003/33 / EC决策对稳定的废物进行分类。稳定电弧炉粉尘中分别含10％（重量）和5％（重量）的氯氧化镁和磷酸镁水泥的浸出液，其浓度低于在无害废物掩埋场处置的规定限值；但是，使用25％（重量）的MgO或波特兰水泥稳定的电弧炉粉尘无法处置在危险废物掩埋场中。使用MgO或波特兰水泥（重量百分比为25％）的稳定的Pb精炼粉尘可以在危险废物填埋场处置，用20％（重量）的氯氧化镁和磷酸镁水泥稳定的Pb精炼粉尘适合在无害废物掩埋场处置。氧化镁水泥稳定的效率归因于将pH调节在10-11，这会降低金属的溶解度，并且水解的MgO产品的正表面电荷会导致对准金属氧阴离子的高度吸附。