ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
A new method of evaluation of element pollutant mobility in sediments
Viera Vojteková, Jarmila Nováková, Daniela Mackových, and Jana Blašková
Department of Analytical Chemistry, Institute of Chemical Science, University of P. J. Šafárik, Moyzesova 11, SK-040 00 Košice, Slovakia
Received: 9 November 2006 Revised: 21 June 2007 Accepted: 2 July 2007
Abstract: The application of a strong chelating agent for the screening test of element mobility in sedimentary systems was investigated.
Single-step and sequential extraction procedures were applied to four sediment samples collected from an industrially polluted
region of Eastern Slovakia. A sequential extraction procedure (SEP), recommended by the Institute for Reference Materials
and Measurements (IRMM), was applied and used as a reference extraction method. A single-step extraction with 0.05 mol dm−3 ethylenediaminetetraacetic acid (EDTA) was adapted for sediments when extraction conditions were optimised. The extraction
efficiency of the single-step procedure was compared with that of SEP. The contents of elements extracted by Na2EDTA were
in good agreement with the sum of the first three steps of the SEP for Fe, Mn, and Co. Na2EDTA can therefore be considered capable to extract the majority of elements associated with the reducible sedimentary phase
— bound to Fe and Mn oxides in the regional geological conditions of the monitored region. Thus, Na2EDTA extraction of Fe and Mn can serve as an economical, time-saving supplementary test for the IRMM procedure.
Keywords: Fe - Mn - Co - extractable forms - element mobility - sediments
Full paper is available at www.springerlink.com.
Chemical Papers 62 (2) 160–167 (2008)