Photochemical removal of uranium from a phosphate waste solution

被引：37

作者：

Evans, CJ ^{[1
]}

Nicholson, GP ^{[1
]}

Faith, DA ^{[1
]}

Kan, MJ ^{[1
]}

机构：

[1] AWE, Mat Sci Res Div, Reading RG7 4PR, Berks, England

来源：

GREEN CHEMISTRY | 2004年 / 6卷 / 04期

关键词：

D O I：

10.1039/b313356g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A photochemical method to remove uranium from a phosphate containing waste in high yield is reported. The solution resulting from the titrimetric assay of uranium consists of approximately 1 g dm(-3) uranium in phosphoric acid (3 mol dm(-3)). UV illuminated titanium dioxide in a deaerated and 25 fold diluted waste solution (40 ppm uranium) containing a hole scavenger ( methanol) almost completely (98%) removed uranium from solution at pH 2 in six hours. The product was found to be free of phosphate and resulted in a grey colouration of the titania. Re-dissolution of the uranium occurred in an aerated environment over the course of a week. These results demonstrate the basis for an environmentally friendly method to photochemically reduce and remove uranium from solutions containing strongly co-ordinating ligands.

引用

页码：196 / 197

页数：2

共 12 条

[1]

AHRLAND S, 1975, CHEM ACTINIDES, P465

[2] PHOTODEPOSITION OF URANIUM-OXIDES ONTO TIO2 FROM AQUEOUS URANYL SOLUTIONS [J].