New procedures have been developed to demonstrate the nature of binding of 239Pu in a saltmarsh soil. Evidence is presented which shows that there is a small 239Pu component which is present in a form which can be extracted by chelating agents which are similar to naturally occurring chelating agents. By in-situ derivatization procedures it has been possible to isolate two forms of complexed Pu. The effectiveness of humates as sinks for Pu(IV) and Am(III) have been modelled by using some novel forms of humic and fulvic acids chemically immobilized upon silica.
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- humic acid