Urban snow deposits—pathways of pollutants

The pathways of pollutants in urban snow deposits have been studied in the laboratory, in a pilot study and at an actual deposit. The fractions of dissolved and particle-bound substances in the snow and melt water were studied. The results showed that almost all substances in the snow were attached to particles, while in the melt water more than 50% of most substances were dissolved. A large part of the substances which were attached to particles stayed in the sediment below the deposit, while the dissolved substances were mainly removed with the melt water.