Dissolved and particle-bound substances in urban snow

In order to create a picture of the pollutant pathways for snow in urban ar eas, snow samples were collected in the city of Lulea, northern Sweden. Sam pling sites were chosen in the city centre and in a housing area three diff erent sites in each area. Snow samples were collected during the whole wint er of 1995. The results showed that the amounts of dissolved substances as percentages of the total amounts varied according to time, site and the typ e of substance. For the sites along the roadsides in the city cen;re, the a mounts that were in solution were less than 1% of the lead, 2.5% of the pho sphorus, 11% of the copper, and 18% of the zinc. For the site with no-traff ic, the dissolved fractions were considerably higher. (C) 1999 Published by Elsevier Science Ltd on behalf of the IAWQ. All rights reserved.