The impact of²⁴²Pu speciation on the bioaccumulation of plutonium by babylonia spirata from Jakarta Bay

The research of bioaccumulation Plutonium of Babylonia spirata from Jakarta Bay using²⁴²Pu radiotracer has been conducted. The aquaria experiments were applied by two oxidation states of Pu speciation with three replications. The experiment was carried out by 2 steps, such as uptake and depuration. The bioavailability of²⁴² Pu in the (III) and (IV) oxidation states from the sea has been studied for Babylonia spirata. Biokinetics parameters, such as concentration factors (CF_ss), uptake rate constants (k_u), elimination rate constants (k_e), bioconcentration factors (BCF), and biological half-life (t_b1/2), were investigated. The dissection is carried out to separate the parts of the gastropod’s body so that the target organs for Plutonium contamination can be identified. Each part of the gastropod’s body was prepared radiochemically and analyzed using an alpha spectrometer. The results show that Pu⁴⁺ is potentially accumulated in more significant value than Pu³⁺ by B. spirata, in which Pu is more rapidly distributed and retained longer in the proboscis and gastrointestinal tract.