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Neptunium: The Neglected Actinide: A Review of the Biological and Environmental Literature

Roy C. Thompson
Radiation Research
Vol. 90, No. 1 (Apr., 1982), pp. 1-32
DOI: 10.2307/3575792
Stable URL: http://www.jstor.org/stable/3575792
Page Count: 32
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Neptunium: The Neglected Actinide: A Review of the Biological and Environmental Literature
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Abstract

Data from 89 references relating to the biological and environmental behavior of neptunium are reviewed with particular attention to the potential risks from possible releases of neptunium isotopes by the nuclear industry. The behavior of neptunium differs in many significant respects from that of other transuranic elements. It is more mobile environmentally and more readily absorbed by man, although some of the higher reported values for gastrointestinal absorption appear to have been influenced by the very high mass levels of ${}^{237}{\rm Np}$ required for experimental study. In studies with experimental animals its ratio of deposition in bone/liver is greater than that of other transuranic elements. Its long-term toxicity in experimental animals is similar to that of other transuranics.

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