DOSE ASSESSMENT IN ANABAS TESTUDINEUS AFFECTED FROM EXPOSURE OF WATERBORNE Th-232

Results of the bioaccumulation study and dose assessment of Th-232 in whole-body Anabas testudineus are presented. The objective of this study was to evaluate the effect of Th-232 concentration activity on the laboratory bioaccumulation and total dose rate in Anabas testudineus. Anabas testudineus adults were exposed to different waterborne Th-232 levels: 0 Bq/L (control), 50 Bq/L and 100 Bq/L for 30 day (uptake phase). Whole-body uptakes of Th-232 in Anabas testudineus were calculated and total dose rates using ERICA Assessment Tool were also estimated. The results showed the increase of waterborne Th-232 concentration corresponded to a progressive increase of Th-232 accumulation and total dose rate (internal and external) in whole-body Anabas testudineus. Considering the ERICA dose rate screening value of 10 µGy/h, the findings can be concluded the estimated of total dose rate (0.38 – 1.29 µGy/h) in Anabas testudineus was in order of small magnitude. Nevertheless , these results showed that the Anabas testudineus has a potential to accumulate thorium.