Distribution of Pu Species in Sea Water of Ujung Lemahabang

Distribution of Pu related to its oxidation state in Ujung Lemahabang Sea water has been investigated by using ²⁴²Pu isotop. The objective of this research is to study a species of Pu in Ujung Lemahabang marine environment. The ²⁴²Pu isotop was added into sea water samples, mixed well and allow to stand for several weeks. Furthermore, oxidation state of Pu in sea water was determined by using coprecipitation method with NdF₃. Activity of Pu in precipitate was measured by using GSM α/β counter. The result showed that Pu in sea water of Ujung Lemahabang is distributed in the form of Pu (III, IV) and Pu (V,VI) in the value of 9 % and 61 % respectively. The Pu in Sea water was also found about 27 % in particulate matter with diameter> 0.22 μm. (author)