Biogenic Uraninite Nanoparticles and Their Importance for Uranium Remediation

被引：117

作者：

Bargar, John R. ^{[1
]}

Bernier-Latmani, Rizlan ^{[2
]}

Giammar, Daniel E. ^{[3
]}

Tebo, Bradley M. ^{[4
]}

机构：

[1] Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[2] Ecole Polytech Fed Lausanne, Environm Microbiol Lab, CH-1015 Lausanne, Switzerland

[3] Washington Univ, Dept Energy Environm & Chem Engn, St Louis, MO 63130 USA

[4] Oregon Hlth & Sci Univ, Div Environm & Biomol Syst, Beaverton, OR 97006 USA

来源：

ELEMENTS | 2008年 / 4卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

uraninite; biogenic uraninite; microbial uranium reduction; bioremediation; dissolution; EXAFS;

D O I：

10.2113/gselements.4.6.407

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Biogenic uraninite is of interest to geoscientists for its importance to bioremediation strategies, remarkably small particle size, and biological origin. Recent studies have begun to illuminate the chemical/structural complexities of this Important natural nanomaterial. Intriguingly, in spite of its incredibly diminutive size, the molecular-scale structure, energetics, and surface area-normalized dissolution rates of hydrated biogenic uraninite appear to be similar to those of coarser-particle, abiotic, stoichiometric UO2. These findings have important implications for the role of size as a moderator of nanoparticle aqueous reactivity and for the bioremediation of subsurface U(VI) contamination.

引用

页码：407 / 412

页数：6

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