Abstract
The present distributions of 239+240Pu, 241Am and activity ratio of 241Am/239+240Pu in surface seawater of the Peninsular Malaysia east coast were studied. The surface seawater samples were collected at 30 identified stations during the expedition conducted in 2008. 239+240Pu activity concentrations in surface seawater of the studied area were in the range of 2.33 ± 0.20–7.95 ± 0.68 mBq/m3, meanwhile 241Am activity concentrations ranged from MDA to 1.90 ± 0.23 mBq/m3. The calculated activity ratios of 241Am/239+240Pu were varied and disperse distributed with the ranged of 0.12–0.53. The relationships between anthropogenic radionuclide and oceanographic parameters such as turbidity and salinity were examined. The linearly relationships between 239+240Pu and oceanographic parameters are important for better understanding of its transport processes and behavior in the east coast of Peninsular Malaysia marine environment. Thus, the differ of distribution of 239+240Pu, 241Am and 241Am/239+240Pu in the studied area mainly due to high affinity of 239+240Pu to associate with sinking particles, mobility nature of 241Am, degree of particle reactive of both anthropogenic radionuclides, scavenging and removal process; and others.
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