Strathprints logo
Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Determination of uranium concentration and isotopic composition by means of ICP-MS in sequential extracts of sediment from the vicinity of a uranium enrichment plant

Howe, Susan E. and Davidson, Christine M. and McCartney, Martin (2002) Determination of uranium concentration and isotopic composition by means of ICP-MS in sequential extracts of sediment from the vicinity of a uranium enrichment plant. Journal of Analytical Atomic Spectrometry, 17 (5). pp. 497-501. ISSN 0267-9477

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

A method has been developed for the determination of the U-238/U-235 isotope abundance ratio in sequential extracts of freshwater sediment by means of ICP-MS. Instrument parameters were optimised, and sample pre-treatment procedures developed, to improve the quantification of U-235. Extracts prepared according to the three-stage BCR sequential extraction protocol were passed through a 2 cm column of anion exchange resin (BioRad AG1-X8), and uranium eluted with 8 mol l(-1) HNO3 prior to analysis. The precision obtained for measurement of the U-238/U-235 ratio in solutions containing 20 ng ml(-1) U-238 and 0.2 ng ml(-1) U-235 was 0.18%. Analysis of stream sediments from the vicinity of a nuclear fuel enrichment plant revealed an enhancement in uranium levels (up to 27 mug g(-1) dry weight) which decreased with distance from the effluent discharge point. The U-238/U-235 ratios measured in sequential extracts of the stream sediments were significantly less than 100 (cf. the natural value of 137.9), confirming that Rivacre Brook is contaminated with U-235-enriched uranium. Results of the sequential extraction also suggested that uranium is discharged from the plant in, or rapidly converted to, a relatively refractory form.

Item type: Article
ID code: 373
Keywords: spectrometry, plasmas, airborne uranium, metals, speciation, soil, Geology, Chemistry, Spectroscopy, Analytical Chemistry
Subjects: Science > Geology
Science > Chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Mr Derek Boyle
    Date Deposited: 07 Mar 2006
    Last modified: 04 Sep 2014 11:19
    URI: http://strathprints.strath.ac.uk/id/eprint/373

    Actions (login required)

    View Item