Aviso GmbH

To calculate the total traffic-related PM₁₀ emissions the non tail-pipe emissions (abrasion originating from road and vehicle) and re-suspension of dust have to be considered besides the exhaust emissions.A practical approach for the calculation of the non tail-pipe PM₁₀ emissions is described based on specific data derived from actual measurements.

Ultrafine particles (UFP) are a currently much-discussed air quality parameter that is characterized by its high spatial-temporal variability, depending on sources and production processes.Addnl., UFP is suspected of causing independent health effects.Regarding possible reduction measures, an overview of the origin, contributions, formation, and interactions of UFP is important to be able to use UFP as an assessment parameter for air quality.The aim of this study was to create and process a literature survey on the formation of UFP from precursor substances.The focus should be on the formation of UFP by VOCs (of natural and anthropogenic origin).As part of the research, the source groups "road traffic", "air traffic", "shipping", "wood burning" (in small combustion systems and wild fires), "large combustion systems" and biogenic sources were identified as particularly relevant with regard to the emission of UFP and their precursor substances.The most relevant publications of recent years for each of these source groups were researched and presented.In the second part of the project, the contributions of these source groups were brought together and compared, on the one hand regarding their emissions of UFP precursor substances and the associated SOA (secondary organic aerosol) formation potential, and on the other hand with regard to their contributions to UFP concentrationsFinally, reduction potentials were compiled for the most important source groups.