Nanomaterials in waste incineration plants and landfills  (Contact Prof. Dr. J. Wang)
Release of nanomaterials leads to the question where they will eventually deposit. The two projects funded by the Swiss Federal Office for Environment (BAFU) investigate nanomaterials in waste incineration processes, the material flow model and the landfill as the final sink for nanomaterials. We characterized physical and chemical properties of fly ashes from Swiss waste incineration plants and determined the ash fraction in the nanometer range. Modeling showed that the majority of the engineered nanomaterial-mass ends up in landfills. Emission measurement at two Swiss waste incineration plants has demonstrated that the flue gas treatment systems are highly efficient. We are investigating nanomaterials in the landfill leachate, their behaviors and transport properties.