to the health of millions of people and global ecosystems. In recent years, pollution becomes
a principal problem with human activities. Natural and artificial radionuclides as radiation
sources in surface water and sediments captured the attention of many researchers in the
last three decades, especially after the Chernobyl disaster in 1986 [1]. Radionuclides most
widespread natural radioactive series are those of potassium (K40), uranium (U238) and …