Measuring reactive metal in soil: a comparison of multi-element isotopic dilution and chemical extraction

Marzouk, E.R.; Chenery, S.R.; Young, S.D.. 2013 Measuring reactive metal in soil: a comparison of multi-element isotopic dilution and chemical extraction. European Journal of Soil Science, 64 (4). 526-536. https://doi.org/10.1111/ejss.12043

Full text not available from this repository. (Request a copy)

Abstract/Summary

The isotopically exchangeable metal pool (E-value) of zinc (Zn), cadmium (Cd) and lead (Pb) were simultaneously measured, using stable isotope dilution, in soils contaminated by Pb/Zn mining activities and varying in properties likely to affect metal reactivity, including pH, organic matter content, metal concentration and land use. E-values were compared with single and sequential extraction schemes. Results showed a wide range of metal reactivity (approximately 1–100% of total) depending on the extent of contamination and on the prevailing soil conditions. Across the range of soils, the E-values showed no consistent correspondence to any single chemical extraction procedure (EDTA, DTPA and HNO3) although there was reasonable agreement with the extractants 0.05 m EDTA and 0.43 m HNO3 in acidic organic soils. Extraction with 0.005 m DTPA substantially under-estimated the isotopically exchangeable metal content. E-values corresponded reasonably well with the exchangeable metal (fraction 1 (F1) of the sequential extraction procedure) in calcareous soils but relatively poorly and inconsistently with F1–F2, F1–F3 or F1–F4 in acidic-neutral soils. Operational aspects associated with determination of multi-element E-values are discussed.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1111/ejss.12043
ISSN:	13510754
Date made live:	28 Jul 2014 09:24 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/507926

Actions (login required)

View Item

Document Downloads

More statistics for this item...