Xiao Y, Oorsprong M, Yang Y, Voncken J H L
Department of Materials Science and Engineering, Metals Production, Refining and Recycling, Delft University of Technology, Delft, The Netherlands.
Waste Manag. 2008;28(6):1020-6. doi: 10.1016/j.wasman.2007.02.034. Epub 2007 May 3.
During incineration of municipal solid waste (MSW), various environmentally harmful elements and heavy metals are liberated either into bottom ash, or carried away with the off-gases and subsequently trapped in fly-ash. If these minor but harmful elements are not properly isolated and immobilized, it can lead to secondary environmental pollution to the air, soil and water. The stricter environmental regulations to be implemented in the near future in The Netherlands require a higher immobilization efficiency of the bottom ash treatment. In the present study, MSW incinerator bottom ash was vitrified at higher temperatures and the slag formed and metal recovered were examined. The behaviour of soluble elements that remain in the slag is evaluated by standard leaching test. The results obtained can provide a valuable route to treat the ashes from incinerators, and to make recycling and more efficient utilization of the bottom ash possible.
在城市固体废物（MSW）焚烧过程中，各种对环境有害的元素和重金属要么释放到底灰中，要么随废气带走，随后被困在飞灰中。如果这些微量但有害的元素没有得到妥善的分离和固定，可能会导致对空气、土壤和水的二次环境污染。荷兰在不久的将来将实施更严格的环境法规，这要求提高底灰处理的固定效率。在本研究中，对城市固体废物焚烧炉底灰进行了高温玻璃化处理，并对形成的炉渣和回收的金属进行了检测。通过标准浸出试验评估了留在炉渣中的可溶性元素的行为。所得结果可为处理焚烧炉灰烬以及实现底灰的回收利用和更高效利用提供一条有价值的途径。
