Incorporation of hydroxypyridinone ligands into self-assembled monolayers on mesoporous supports for selective actinide sequestration

Yuehe Lin, Sandra K. Fiskum, Wassana Yantasee, Hong Wu, Shas V. Mattigod, Erich Vorpagel, Glen E. Fryxell, Kenneth N. Raymond, Jide Xu

Research output: Contribution to journalArticle

76 Scopus citations

Abstract

In this study, three isomers of hydroxypyridinones (1,2-HOPO, 3,2-HOPO, and 3,4-HOPO) were attached to self-assembled monolayers on mesoporous silica (SAMMS). The HOPO-SAMMS materials have superior solid adsorbents properties; they do not suffer from solvent swelling; their rigid, open pore structure allows rapid sorption kinetics; their extremely high surface area enables the installation of high functional density; and being silica-based, they are compatible with vitrification into a final vitreous waste form. Kinetics, equilibrium, and selectivity of the adsorptions of actinide on the HOPO-SAMMS at various pH values and in the presence of other metal cations, anions, and competing ligands are reported. Rapid sequestration of U(VI), Np(V), and Pu(IV) was observed. Very little competition from transition metal cations and common species was observed.

Original languageEnglish (US)
Pages (from-to)1332-1337
Number of pages6
JournalEnvironmental Science and Technology
Volume39
Issue number5
DOIs
StatePublished - Mar 1 2005

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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