Radioktivt cesium (Cs-137) i vildsvin (Sus scrofa) från Tjernobyldrabbade områden i Sverige

Detta är en Kandidat-uppsats från SLU/Dept. of Soil and Environment

Sammanfattning: In April 1986 an accident occurred at the nuclear power station in Chernobyl. Radionuclides were spread all over Europe including Sweden. Today there are still measurable concentrations of 137Cs in the different ecosystems in the contaminated parts of Sweden. The wild boar is the second most popular game in Sweden and today the Swedish population consumes more wild boar meat than ever. As the wild boar population increases the wild boars are moving further north towards the contaminated areas, which creates an interest to study the state of 137Cs in wild boars in these areas. Muscle samples from wild boars collected during 2010-2013 were analyzed based on 137Cs content. Information about age, gender, weight, where and when the wild boars were killed and in some cases if it was killed at a feeding location was collected for each individual. The aggregated transfer factor for the wild boar meat was also calculated. The results only provide an overview of how the 137Cs content relates to the wild boar population in the investigated areas, because the samples are scattered in terms of where the wild boars were killed and during different seasons. The results demonstrate a difference between the genders where the sows have a significant higher average concentration of 137Cs. Out of 72 samples, 14 samples were above the threshold 1500 Bq/kg which is the marketed value for game in Sweden. The average concentration of 137Cs measured in wild boars was 789 Bq/kg and the 137Cs concentration varied between 1-4860 Bq/kg. The aggregated transfer factor (Tag) varied between 0.0004 – 0.492 m2/kg. The result of Tag showed that the proportion of 137Cs per square meters soil that is transferred to every kilo wild boar is lower the higher the concentration is in the soil.

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