期刊
APPLIED SPECTROSCOPY
卷 64, 期 9, 页码 1045-1053出版社
SAGE PUBLICATIONS INC
DOI: 10.1366/000370210792434323
关键词
Heavy metals; Mining sites; Geochemistry; Energy-dispersive X-ray fluorescence; EDXRF; Wavelength-dispersive X-ray fluorescence; WDXRF
资金
- Spanish National Research programme [CGL2004-05963-C04-02, CGL2007-66861-C04-01]
- Spanish government [BES2005-6810]
Elemental analysis of different sediment cores originating from the Cartagena-La Union mining district in Spain was carried out by means of a programmable small-spot energy-dispersive X-ray fluorescence (EDXRF) spectrometer to study the distribution of heavy metals along soil profiles. Cores were obtained from upstream sediments of a mining creek, from the lowland sedimentation plain, and from a mining landfill dump (tailings pile). A programmable two-dimensional (21)) stage and a focal spot resolution of 600 mu m allow us to obtain complete core mapping. Geochemical results were verified using a more powerful wavelength-dispersion X-ray fluorescence (WDXRF) technique. The data obtained was processed in order to study the statistical correlations within the elemental compositions. The results obtained allow us to observe the differential in-depth distribution of heavy metals among the sampled zones. Dump site cores exhibit a homogeneous distribution of heavy metals, whereas the alluvial plain core shows accumulation of heavy metals in the upper part. This approach can be useful for the fast screening of heavy metals in depositional environments around mining sites.
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