Natural Radium Detection and Inventory Flux of Isotopes in Particulate and Dissolved Phases of Seawater at Kapar Coastal Area Caused by Coal-Fired Power Plant

摘要

Distribution of ~(226)Ra and ~(228)Ra radioactive in marine have been studied at Kapar coastal area that closed to Sultan Salahudin Abdul Aziz Shah (SJSSAS) power station. The concentration level of ~(226)Ra and ~(228)Ra were measured in seawater include total suspended solids (TSSrw) and dissolved phases from September 2006 to February 2008. The measurement technique used for ~(226)Ra and ~(228)Ra was using cation exchange column and counted using Liquid Scintillator Ciunter (LSC). The radioactivities of ~(226)Ra_(SW) and ~(228)Ra_(SW) in the dissolved phase of seawater ranged from 1.29 ± 0.52 mBq/L - 3.69 ± 1.29 mBq/L and 2.12 ± 0.71 mbq/L — 17.07 ± 6.03 mBq/L respectively. The measurement of radioactivities of radium isotopes in the particulate phase of seawater ranged from 15.62 ± 1.99 Bq/kg - 241.76 ± 100.23 Bq/kg (~(226)Ra_(TSW)) and 7.19 ± 3.21 Bq/kg - 879.66 ± 365.74 Bq/kg (~(228)Ra_(tsw)). Radium isotopes inventory in this study showed that suspended solid have higher inventory value than seawater and sediment. Study also found that suspended solid play an important role for flux contribution at seawater. Based on the finding, the radioactivity concentration of ~(226)Ra and ~(228)Ra is higher in particulate phase than in dissolved phase.