Université de Pau et des Pays de l'Adour, CNRS-LCABIE, UMR 5254 IPREM, 2 avenue P. Angot, 64000 Pau, France.
Talanta. 2011 Oct 15;85(5):2504-10. doi: 10.1016/j.talanta.2011.07.100. Epub 2011 Aug 5.
This paper deals with the study of uranium-colloid interactions in a carbonated soil. The work is focused on the immediately available fraction obtained after a leaching process, according to a normalized batch method. In order to characterize the different colloidal carriers, Asymmetrical Flow Field-Flow Fractionation (As-Fl-FFF) coupled to different detectors (UV, Multi Angle Laser Light Scattering (MALLS) and Inductively coupled Plasma-Mass Spectrometry (ICP-MS)) was used. The colloidal carriers are mainly inorganic particles (carbonated particles and clays) mixed with organic substances. Furthermore, dissolved and colloidal uranium species in the leaching solutions were monitored by Capillary Electrophoresis (CE) coupled to ICP-MS, in order to investigate the uranium/colloids interactions. According to the first results, uranium fate in this specific soil is controlled by sorption/desorption phenomena, strongly pH dependent.
本文研究了碳酸土壤中铀胶体的相互作用。工作重点是根据标准化批量法，在浸出过程后获得的立即可用部分。为了表征不同的胶体载体，采用不对称流场流分离（As-Fl-FFF）与不同的检测器（UV、多角度激光散射（MALLS）和电感耦合等离子体质谱（ICP-MS））相结合。胶体载体主要是无机颗粒（碳酸颗粒和粘土）与有机物质混合。此外，通过与电感耦合等离子体质谱（ICP-MS）耦合的毛细管电泳（CE）监测浸出溶液中的溶解和胶体铀物种，以研究铀/胶体的相互作用。根据最初的结果，这种特定土壤中铀的命运受吸附/解吸现象控制，强烈依赖于 pH 值。
