Abstract:

The distributions of 234U, 238U, 226Ra, 210Pb and 210Po in the Prydz Bay, Antarctic, 234U/ 238U and 210Po/ 210Pb activity ratios are reported. The results show that the concentration of uranium in surface water is varies from 13.28-14.20 μmol·m -3, with an average of (13.82±0.29) μmol·m -3. The mean values of ( 234U/ 238U) A.R. is 1.14±0.03. Uranium concentration-salinity relation is, U=0.443S-0.988 (r=0.895). The dissolved 226Ra varied from 1.37 to 1.78 Bq·m -3 with an average of 1.55 Bq·m -3. Particulate 226Ra in 5 surface water samples of studied areas range from 0.006-0.035 Bq·m -3 with an average of 0.015 Bq·m -3. The concentration ranges are 0.80-1.52 Bq·m -3 with an average of 1.14 Bq·m -3 for dissolved 210Po, and 1.34-2.15 Bq·m -3 with an average of 1.66 Bq·m -3 for dissolved 210Pb. The 210Po/ 210Pb activity ratios are 0.55-0.84 with a mean ratio of 0.69. The extent of 210Po/ 210Pb disequilibria is discussed. The vertical distributions of dissolved and particulate 210Pb, 226Ra in six layers from upper 200 m depths of ST station and Portioning between dissolved and particulate phases are presented.