生活垃圾焚烧处理比例逐年增加导致飞灰大量产生。我国规定稳定化飞灰可在生活垃圾卫生填埋场分区填埋，但因填埋场选址困难和建设进度等原因，出现稳定化飞灰与生活垃圾混合填埋问题。混合填埋后，存在稳定化飞灰中二噁英溶出和转化的风险。本研究拟采用稳定化飞灰与生活垃圾混合填埋模拟实验装置，研究混合填埋过程中二噁英（PCDD/Fs）溶出和转化的动态变化规律和主要影响因素；采用因素设计、响应面法和混合设计方法，设计单因素及多因素间交互影响实验，通过相关性分析、（非）线性回归及多元统计分析（PCA、PLS），研究二噁英溶出和转化的影响因素及影响规律；分别采用分子动力学模拟方法和二噁英指纹特性分析方法初步揭示二噁英的溶出及转化机制；通过反应动力学分析及数学模拟方法建立混合填埋条件下二噁英变化预测模型。项目研究成果将为飞灰稳定化技术和稳定化飞灰填埋技术的发展提供科学依据和理论参考。

The ratio of municipal solid waste incineration (MSWI) is increasing, which will result in large quantities of MSWI fly ashes. It is regulated that MSWI fly ash can be disposed in different zone of MSW sanitary landfill in China. But due to the difficulties of site selection, construction progress, and other reasons, part of stabilized fly ashes were co-disposed with MSW, which may bring about risk of leaching and transformation of dioxin from stabilized fly ash. Experimental landfill devices which simulated stabilized fly ash co-disposal with MSW will be used in the project. The dynamic variation characteristic and main influencing factor of the leaching and transformation of dioxin (PCDD/Fs) from stabilized fly ash will be studied. Factor design, response surface methodology, and mixture-design technique will be used to design single-factor and multi-factor influencing tests. Linear (or non-linear) regression and multivariate statistical analysis (PCA, PLS) will be used to ascertain the influencing factors and laws of the leaching and transformation of dioxin. The research methods of molecular dynamics simulation and dioxin fingerprint analysis will be used to reveal the leaching and transformation mechanism of dioxin. Based on the methods of reaction kinetics analysis and mathematical simulation, a prediction model for dioxin variation in mixed landfill conditions will be established. The research results can provide scientific basis and theoretical reference for the development of the stabilization technology of fly ash and the landfill technology of stabilized fly ash.