Vertical distribution of rhenium in seawater samples collected three locations off the coast of Aomori, Japan

Rhenium behavior in surface seawater (0-30 m) was observed using samples collected at three locations off the coast of Aomori Prefecture, Japan. Physico-chemical forms of Re in seawater from other locations were also observed to verify Aomori findings It was found that almost 100% was in dissolved forms, mainly ReO4-. As the major chemical form was ReO4- Re concentration in seawater was almost constant; indeed, in this study, the concentration was constant from the surface to 30 m. The Re concentrations ranged from 6.15 - 7.39 ng kg-1, and the concentrations in the Sea of Japan side were slightly lower than those in the Pacific Ocean side. Possibly, low Re water mass had been added to the Sea of Japan side, e.g., river waters from Japan and/or the Asian continent.International Symposium on Techentium-Science and Utilizatio