Abstract
The sorption of aqueous Np(V) on crystalline α-FeOOH (goethite) has been studied at the molecular level by synchrotron-based X-ray absorption spectroscopy. Sodium nitrate solutions (pH 7.2, ionic strength 0.08 M) having a Np(V) concentration of 1.3×10 -5 M were reacted with high surface area goethite (50 m 2 /g), resulting in ∼95% uptake of the Np and a sorption density of 10 -5 mol of Np/g of goethite
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