Review and Determine the Amount of Radioactive Element Cesium -137 and its Environmental Impacts In lake Water and Soil Shoorabil

Shoorabil Lake, which locates in the middle of Ardabil city, is higher than the city itself. It is an enclosed sedimentary basin in southern mountain foots of Ardabil. This lake as one of the sensitive ecosystems of Ardabil is of unique and special physical, chemical, ecological, and biological properties . One of the elements which is potentially destructive to environment is ion generating radiances. This is the result of natural recourses with cosmic origin, natural radioactive substances in earth’s crust, and artificial resources like artificial radioactive substances and radioactive systems in the reactor.The Cs – 137  Ashrams Chernobyl scattered in the environment and the CIS, Eastern Europe and possibly parts of the province of Ardabil is also affected .For determining activity degree of elements Cs-137, Iran’s atomic energy agency laboratory (Jaber-Ebn-Hayyan laboratory), and measured by HPGe Gamma spectrometer with germanium detector in water-samples reached nearly to its acceptable level. No density of cesium 137 – which is among artificial radioactive substances – was observed, and in all samples, it is lower than the level identified by Gamma spectrometer system of Jaber Ebn Hayyan laboratory in Iran’s atomic energy agency. Therefore, it can be said that there is no evidence of Chernobyl or any other unnatural phenomenon in the waters around Shoorabil Lake. The amount of Cesium 137, which is unnatural radioactive substance and its presence can be due to Chernobyl