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7338382 
Journal Article 
The Content of Heavy Metals in Rainwater Flowing from Roofs with Different Coatings 
Sikora, J; Niemiec, M; Szekg-Sikora, A; Kubon, M 
2018 
1 
Rocznik Ochrona Środowiska
ISSN: 1506-218X
EISSN: 2720-7501 
20 
1079-1094 
Polish 
WOS:000469166100008 
The objective of the paper was to determine the chemical composition of water flowing down from different types of roofs of houses in comparison to their content in rainwater. The research covered 42 roofs of single-family houses, inventory buildings or sacral facilities. Rainwater collected in six randomly selected sites on the investigated area was used for research. The research was carried out in the areas with low anthropoppression. Various types of roofs occurring in the investigated area were used in the study: cement tile, ceramic tile, bituminous roof, galvanized sheet metal, copper sheet metal, eternit. The content of Cr, Zn, Pb, Cu, Cd, Ni, Fe, and Mn was calculated in the investigated water samples. Additionally pH of water was determined. The results show that the water flowing down from roofs included more investigated elements than rainwater. The average coefficient of enrichment in iron of water flowing down from the galvanized sheet metal roof was 8 and the average amount of zinc flowing down from the roof was more than forty times higher than in comparison to rainwater, and of lead over twenty times higher. The content of manganese in water falling down from galvanized sheet metal roofs was almost thirteen times higher in comparison to rainwater. In case of water from copper roofs the admissible content of copper in sewage introduced to surface water or ground was exceeded. Zink content was exceeded in case of water from galvanized sheet metal roofs. In case of the remaining samples, no inadmissible amounts were reported. Water from roofs covered with cement tile, etemit and copper sheet metal had higher pH content in comparison to rainwater. In the remaining cases no statistically significant differences were reported. 
roofs; water from roofs; trace elements; sewage