English Abstract In order to assess the lifetime hazard of ingestion
exposure of man to new substances a steady state model has been constructed
called Uniform system for the Evaluation of Substances. In this risk
assessment system emission concentration of organic substances in water and
soil are linked to exposure concentration for humans and predators. In this
prototype model the route of the compound from the air into the plant has
not been included. In this report several models describing deposition on
and uptake of aerosols and gaseous substances into plants have been
described. In most models described here deposition and uptake are
combined. In USES the deposition part has already been described and for
implementation in the USES model the deposition part of these models can be
left out. For implementation in USES (1992) the aerosol model of McKone and
Ryan (1989) seems most appropriate. This model estimates a partition
coefficient for all aerosols with a particle size < 5 mum. For gaseous
substances the model of Riederer (1990) seems most appropriate, which
combines physical-chemical properties of the substance and the fugacity
principles of Mackay and coworkers.
