Table 2: The average activity concentration of radionuclides in the collected soil samples (Bq/kg ± SEM).

Soil samples ( ) Activity concentration
238U 232Th 40K

Northern zone 57 ± 536 ± 3616 ± 113
Southern zone 52 ± 441 ± 3558 ± 10
Central zone 46 ± 332 ± 3519 ± 7

Average 52 ± 436 ± 3564 ± 10