Occurrence, Behaviors, and Fate of Per- and Polyfluoroalkyl Substances (PFASs) in Typical Municipal Solid Waste Disposal Sites

•PFASs in different MSW disposal sites worldwide are summarized and compared.•Ultrashort-chain PFASs showed unexpectedly high concentration levels in leachate.•Levels of PFASs in incineration ash were lower than that in incineration leachate.•Application of composts led to the release of PFASs back into the soil-crop system.•Non-specific methods and non-target analysis are promising for PFAS identification.