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DOI: 10.5593/SGEM2016/HB43/S06.024

SAMPLE TREATMENT METHODS FOR IDENTIFICATION OF METAL-RICH PARTICLES IN SOILS AND LICHENS

M. Vitkova, M. Bokotejova, M. Komarek
Friday 11 November 2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, SGEM Vienna GREEN Extended Scientific Sessions, www.sgemviennagreen.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-82-7 / ISSN 1314-2704, 2 - 5 November, 2016, Book 4 Vol. 3, 181-186pp, DOI: 10.5593/SGEM2016/HB43/S06.024

ABSTRACT

Emissions from mining and smelting industry pose high risk of pollution for the environmental systems. Identification of mineral particles settled in the environment is crucial for the assessment of risk elements mobility and to indicate the potential sources of contamination. Specific sample pretreatment is generally necessary before mineralogical investigations. Therefore, sample preparation and separation methods were assessed in order to efficiently detect and further identify metallic particles in soil and lichen samples. Various sieving/milling/separation methods were applied before analyses using scanning electron microscopy coupled with energy dispersive spectrometer and/or X-ray diffraction analyses. Target particles were most abundant in the 63-μm soil fraction separated in heavy liquid supported with ultrasound. The presence of various Ni and Cu sulphides in the topsoil indicates the smelter-derived particles. Tiny metallic fragments yielding several μm in size were observed within the lichen samples. Additionally, the occurrence of metallic oxides indicates the weathering processes of industrial particles.

Keywords: separation, heavy fraction, metals, metallurgy, environmental samples

PAPER DOI: 10.5593/SGEM2016/HB43/S06.024, SAMPLE TREATMENT METHODS FOR IDENTIFICATION OF METAL-RICH PARTICLES IN SOILS AND LICHENS

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