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Capillary zone electrophoresis for U(VI) and short chain carboxylic acid sorption studies on silica and rutile.
MedLine Citation:
PMID:  21238757     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Capillary zone electrophoresis was used to study the uranyl and short chain carboxylic acid sorption on silica and rutile. The separation and the simultaneous determination (in a single run) of a number of short chain carboxylic acids (oxalic, formic, acetic and propionic) and U(VI) with direct UV detection is developed for the analysis of solutions after the sorption experiments. The reverse polarity mode is used (the injection is performed at the negative end). The matrix effect of Si(IV) (possible silica dissolution product) and perchlorate (added for constant ionic strength in sorption experiments) on the separation of U(VI) and organic acids is investigated. The influence of methanol addition in carrier electrolyte on the separation selectivity of given analytes is also studied. Under the chosen conditions (carbonate buffer (ionic strength of 0.1M), pH 9.8, 0.15mM of tetradecyltrimethylammonium bromide, 25% (v/v) of methanol) the calibration curves are plotted. They are linear in two ranges of concentration from ∼1×10(-5) to ∼1×10(-3)M for oxalate, acetate, propionate, U(VI) and ∼1×10(-4) to ∼1×10(-3) for formate. The accuracy of the procedure is checked by the "added-found" method in simulation solutions. The relative standard deviations of the concentrations found are within the range of 1-10% and the recovery is in the range of 90-115%. This method is applied for the analysis of aqueous samples issued from sorption experiments on silica and rutile. The obtained results indicate that the given organic acids decrease uranium sorption both on silica and rutile. These experiments demonstrate that short chain carboxylic acids can influence the mobility and the chemistry of U(VI) in the environment.
Authors:
Vladimir Sladkov; Yujia Zhao; Florence Mercier-Bion
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Publication Detail:
Type:  Journal Article     Date:  2010-12-01
Journal Detail:
Title:  Talanta     Volume:  83     ISSN:  1873-3573     ISO Abbreviation:  Talanta     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  1595-600     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Affiliation:
CNRS, Institut de Physique Nucléaire (IPN), UMR 8608, Orsay F-91406, France; Univ Paris-Sud, Orsay F-91405, France.
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