Wastes containing mercury or mercury compounds are designated as “industrial waste requiring special management” owing to their toxicity. They must be stabilized to HgS by sulfurization using a ball mill before landfill disposal to prevent mercury dissolution and diffusion. Recently, methods for treating and disposing of mercury waste have been investigated. The current study aimed to confirm the safety of sulfurized/solidified mercury; therefore, two additional types of solidification are adopted: cement solidification and epoxy resin solidification. Further, the existing sulfur solidification method was also modified. The results obtained by the lysimeter test are as follows: The mercury concentration in leachate satisfied the effluent standard from the initial and met the environmental standard after 4 months. There was no difference in the mercury diffusion amount between the lysimeters with sulfurized/solidified mercury and blank. The maximum mercury elution ratio from the lysimeters was 0.00002%, indicating that there is no risk of mercury elution from sulfurized/solidified mercury in landfills of incineration residue and mixed waste. The new solidification methods, low alkali cement solidification and epoxy resin solidification, have a low risk of mercury diffusion. The safety of sulfurized/solidified mercury waste using low alkali cement or epoxy resin instead of modified sulfur solidification in a real landfill site was confirmed.

含有汞或汞化合物的废物由于其毒性而被指定为“需要特殊管理的工业废物”。在填埋处置之前，必须使用球磨机通过硫化将它们稳定为 HgS，以防止汞溶解和扩散。最近，已经研究了处理和处置汞废物的方法。目前的研究旨在确认硫化/固化汞的安全性；因此，额外采用两种固化方式：水泥固化和环氧树脂固化。此外，还对现有的硫磺凝固方法进行了改进。蒸渗仪测试结果如下：渗滤液汞浓度从初始就满足出水标准，4个月后达到环保标准。硫化/固化汞蒸渗仪与空白蒸渗仪之间汞扩散量没有差异。蒸渗仪的最大汞洗脱率为0.00002%，表明焚烧残渣和混合废物填埋场中的硫化/固化汞不存在汞洗脱风险。新的固化方法，低碱水泥固化和环氧树脂固化，汞扩散风险低。在真实的垃圾填埋场中，使用低碱水泥或环氧树脂代替改性硫磺固化来硫化/固化汞废物的安全性得到证实。