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Anion Exchange � Nitric Acid (cont)<br />
• Trivalent actinides show negligible or no<br />
adsorption on strong base anion exchange resins.<br />
• Actinide elements with stable tetravalent states<br />
are strongly retained from pure aqueous<br />
solutions of nitric acid.<br />
• These systems are therefore well suited for the<br />
isolation of Th(IV) and Pu(IV).<br />
• U(VI) and Pu(VI) are adsorbed to some extent.<br />
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