Concentrations of REEs, Th and U in river waters collected in Japan

Although concentration levels of rare earth elements (REEs), Th and U in river waters collected in Japan have been reported[1], behaviors of these elements along the rivers were not clarified because only one sampling point per river was selected for determination. In this study, 10 samples from rivers each were collected from the upper stream to the river mouth to understand the changes of concentration levels of REEs, Th and U in rivers.Rare Earths \u2704 in Nara, Japa