Metaller i mossor: En undersökning av metallkoncentrationer i väggmossa (Pleurozium schreberi) i Rönnskärsverkens närområde
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
The purpose of this study was to map the extent of copper (Cu), lead (Pb), zinc (Zn), nickel (Ni) and bromine (Br) contamination in Schreber’s big red stem moss (Pleurozium schreberi) from the surrounding area of the smelter Rönnskärsverken, Västerbotten County in Sweden. The emissions of pollutants such as metals have been a big problem since the beginning of the industry’s history. Earlier investigations in the same area based on metal concentrations have proven negative effects on the environment, but the emissions from the smelter have decreased successive since the 1970s. Therefore it is of interest to investigate if the metal concentrations have changed since the last study made in 2004-06. The present study investigated whether there is a contamination gradient with distance to the smelter and if the metal concentrations differ from the last investigation. To investigate this questions moss samples were collected at six different distances from the smelter, in the same areas where previous bird studies were conducted. The results from the analysis show a clear contamination gradient for Cu, Pb, Zn, but not for Ni and Br. The highest measured value is closest to the smelter and decreases with distance. The differences between 2004-06 and 2013 in metal concentrations were not significant for any of the elements. In summary this study shows that even if the emissions have decreased successively during a long time, the emissions still causes atmospheric deposition containing metals that may affect the surroundings negatively.
Place, publisher, year, edition, pages
2013. , 22 p.
smelter, emissions, metal concentration, moss analysis
IdentifiersURN: urn:nbn:se:umu:diva-76205OAI: oai:DiVA.org:umu-76205DiVA: diva2:635610
Jansson, Roland, Universitetslektor