Acidity Major Anions, and Trace Metals in Urban Rain and Roof Runoff From Selected Roof Coverings

Abstract

The paper presents results of research regarding the concentration levels of selected pollutants in
 rain samples and roof runoff waters from buildings. The concentrations of the following analytes were
 determined: pH value, the anions: Cl-, NO3-, SO4
 2- and heavy metals: Zn2+, Pb2+, Cu2+, Cd2+ were performed.
 Two samples were collected in the Tricity, the third in D brówka Tczewska near Gda½sk with old and
 modern-type buildings with various types of roofing. Samples were collected for a period of two months
 (from April to June 2006) always during rainfall. The results obtained allowed us to assess the presence and
 concentration of the given analytes contained in roof runoff waters from buildings, and so, their contribution
 to the total pollution of runoff waters. A correlation between the type of roofing and the level of concentration
 of particular analyte groups was noted, which shows that the materials which roofs are made from (as surfaces
 and as materials) can be an additional factor influencing the pollution of waters running off them