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

被引：77
作者：
Lin, YH
Fiskum, SK
Yantasee, W
Wu, H
Mattigod, SV
Vorpagel, E
Fryxell, GE [1 ]
Raymond, KN
Xu, JD
机构：
[1] Pacific NW Natl Lab, Richland, WA 99352 USA
[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
来源：
ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2005年 / 39卷 / 05期
关键词：
D O I：
10.1021/es049169t
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, three isomers of hydroxypyridinones (1,2HOPO, 3,2-HOPO, and 3,4-HOPO) were attached to selfassembled 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.
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页码：1332 / 1337
页数：6
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