Nagasaki sediments reveal that long-term fate of plutonium is controlled by select organic matter moieties
| Autor: | Chris M. Yeager, Hideo Yamazaki, Peter H. Santschi, Peng Lin, Hongmei Chen, Wei Xing, Daniel I. Kaplan, Luni Sun, Yoko Saito-Kokubu, Chen Xu, Patrick G. Hatcher, Kathleen A. Schwehr |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
geography Environmental Engineering geography.geographical_feature_category 010504 meteorology & atmospheric sciences Electrospray ionization chemistry.chemical_element 010501 environmental sciences Mass spectrometry 01 natural sciences Pollution Sink (geography) Natural organic matter Plutonium chemistry Environmental chemistry Environmental Chemistry Organic matter Waste Management and Disposal Ion cyclotron resonance 0105 earth and related environmental sciences |
| Zdroj: | Science of The Total Environment. 678:409-418 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2019.04.375 |
| Popis: | Forecasting the long-term fate of plutonium (Pu) is becoming increasingly important as more worldwide military and nuclear-power waste is being generated. Nagasaki sediments containing bomb-derived Pu that was deposited in 1945 provided a unique opportunity to explore the long-term geochemical behavior of Pu. Through a combination of selective extractions and molecular characterization via electrospray ionization Fourier-transform ion cyclotron resonance mass spectrometry (ESI-FTICRMS), we determined that 55 ± 3% of the bomb-derived 239,240Pu was preferentially associated with more persistent organic matter compounds in Nagasaki sediments, particularly those natural organic matter (NOM) stabilized by Fe oxides (NOMFe-oxide). Other organic matter compounds served as a secondary sink of these bomb-derived 239,240Pu (31 ± 2% on average), and |
| Databáze: | OpenAIRE |
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