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TRACE element concentrations in river water are controlled by a number of factors, such as lithology,weathering processes or adsorption. Further investigations on trace elements, especially heavy andtransition metals, allow us to evaluate the impact on the environment by human activities. Chinese scholars focus their research on the geochemistry of river water of the Changjiang River and Huanghe River. A number of scholars have conducted research on the uranium geochemistry in river water in orderto know the variation of input of U from rivers to oceans, and to get better understanding of the geochemistry of uranium series in marine geochemistry. Moreover, the presence of uraninite in sediments has beenproposed as an indicator of atmospheric oxidation and reduction levels. Plamer and Edmond suggested
TRACE element concentrations in river water are controlled by a number of factors, such as lithology, weathering processes or adsorption. Further investigations on trace elements, especially heavy andtransition metals, allow us to evaluate the impact on the environment by human activities. Chinese scholars focus A research of the geochemistry of river water of the Changjiang River and Huanghe River. A number of scholars have conducted research on the uranium geochemistry in river water in orderto know the variation of input of U from rivers to oceans, and to get a better understanding of the geochemistry of uranium series in marine geochemistry. Moreover, the presence of uraninite in sediments has beenproposed as an indicator of atmospheric oxidation and reduction levels. Plamer and Edmond suggested