Froth Flotation . There are some areas in materials recovery that benefit from the use of wet processes. In particular, separation of materials by surface chemistry would employ froth flotation . For example, in recovering post-consumer glass, one benefits from using froth flotation to separate ceramic materials from the glass. Further refinements are being explored, using fundamental analytical techniques such as streaming potential .
Much work remains to be done in a wide range of issues related to historical concepts of disposal.
The materials used for barriers to migration, and the related engineering of the facility, all have far shorter histories than the intended life of disposal facilities. The current view of land disposal is that of a tomb that holds unchanging waste into the indefinite future. Modern research suggests altering the landfill into a biological treatment system that can both stabilize the waste and permit its recovery for new applications. Liner Testing . GMs are used in conjunction with clays to isolate landfill contents.