Radioactive contamination in lichens collected from Trabzon and Rize in the Eastern Black Sea Region, Turkey, and a comparison with that of 1995.
After the Chernobyl nuclear accident in 1986, 14 lichen specimens collected from Trabzon and Rize in 1995 were used to detect the amount of the fallout radionuclides. In this paper, radioactivity levels in the same species from the same localities were re-detected to compare with those of 1995. According to the results of the two studies, the radioactivity levels that this paper found for 137Cs and 40K are significantly lower than those of 1995 (about 5.5-127 folds for 137Cs, 5-17 folds for 40K). The level of 212Pb was acceptably small. The highest activities of the lichen species are seen in the locality of Helvaci (Trabzon, 100 m) and Camlihemşin (Rize, 1850 m) while the activities are medium in Bozdoğan (Trabzon, 150 m), Kemaliye (Trabzon, 750 m) and Camlihemşin (Rize, 900 m). The activity values generally increase significantly depending on the altitudes. Since the measurements were performed 20 years after the Chernobyl accident in 1986, radionuclides of 134Cs having short half-life (2.062 y) have not been detected. All data was obtained with a coaxial high purity Ge detector of 15% relative efficiency and resolution 1.9 keV at the 1332 keV gamma of 60Co (Canberra, GC 1519 model).
Yazici
K
K
Faculty of Sciences and Arts, Department of Biology, Karadeniz Technical University, Trabzon, Turkey. kcagri_1997@yahoo.com
Ertuğral
B
B
Damla
N
N
Apaydin
G
G
D002588:Cesium Radioisotopes / Q000032:analysis / Q000378:metabolism; D047852:Chernobyl Nuclear Accident; D007856:Lead Radioisotopes / Q000032:analysis / Q000378:metabolism; D008011:Lichens / Q000378:metabolism; D011197:Potassium Radioisotopes / Q000032:analysis / Q000378:metabolism; D011834:Radiation Monitoring / Q000379:methods*; D011847:Radioactive Fallout / Q000032:analysis*; D012990:Soil Pollutants, Radioactive / Q000032:analysis* / Q000378:metabolism; D013997:Time Factors; D014421:Turkey
D002588:Cesium Radioisotopes; D007856:Lead Radioisotopes; D011197:Potassium Radioisotopes; D011847:Radioactive Fallout; D012990:Soil Pollutants, Radioactive