| A total of 61 samples, from six vertical profiles between surface and 1800 m from the Arabian Sea, have been analysed for uranium concentration to assess its behaviour in oxic and sub-oxic waters. These samples cover a wide range of dissolved oxygen concentration, from 0.14 to 230 muM. Uranium concentration in most of the samples fall in the range of 3.2 +/- 0.2 mug l(-1). In general, uranium exhibits a conservative behaviour in the Arabian Sea water column and denitrification processes do not seem to influence its abundance. The mean uranium/salinity ratio in waters with dissolved oxygen <2 muM is (9.17 +/- 0.15) x 10(-8) g g(-1), nearly identical to the ratio (9.22 +/- 0.27) x 10(-8) g g(-1) in waters with dissolved oxygen >100 muM and in waters... |
