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. 2019 Jan 9;12(2):208. doi: 10.3390/ma12020208

Table 9.

Activity concentrations (Bq/kg) of radionuclides Ra-226, Th-232, K-40 and the activity concentration index, I, of SS, BFS, and cement.

Activity Concentrations (Bq/kg) 25SS 50SS 25BFS 50BFS 100C
K-40 80 94 57 55 54
Ra-226 5.6 6.9 19.8 39 5.4
Th-232 5.8 9.1 8.8 14 5.5
Activity Concentration Index (I) 0.074 0.100 0.129 0.218 0.064