Mineralogical and geochemical study of Lake Dojran sediments (Republic of Macedonia)

Rogan Šmuc, Nastja and Serafimovski, Todor and Dolenec, Tadej and Dolenec, Matej and Vrhovnik, Petra and Vrabec, Mirijam and Jačimović, Radojko and Logar Zorn, Vesna and Komar, Darja (2015) Mineralogical and geochemical study of Lake Dojran sediments (Republic of Macedonia). Journal of Geochemical Exploration, 150. pp. 73-83. ISSN 0375-6742

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In this study the mineralogical and geochemical characteristics of Lake Dojran surficial (0–5, 5–10, 10–15 cm)
sediments were studied in order to determine their suitability for use as potential raw material in
balneotherapeutic treatments. X-ray powder diffraction (XRD) and inductively coupled plasma mass spectrometry
(ICP-MS) analyses were performed, and thereupon chemical index of alteration (CIA) and enrichment factor
(EF) values were calculated.
The XRD results revealed close association of sediment mineralogy with the prevailing metamorphic, volcanic
and igneous rocks of the region surrounding Lake Dojran. CIA values of around 67% suggest a moderate degree
of weathering in the lake catchment area.
According to the EF value results, surficial Lake Dojran sediments are little enriched with Co, Cr, Cu, Pb, and Zn,
moderately enriched with Au, Ni and Sb, moderately severely enriched with Au, severely enriched with Sb and
very severely enriched with As. This elemental enrichment likely originates fromvarious different geogenic (geological
background and polymetallic mineralization) and anthropogenic (tourism, traffic, coatings, untreated
wastewater discharge and agrochemicals) sources. The abundances of the major elements, trace elements and
rare earth elements (REEs) were almost constant, changing very little throughout the surficial (0–5, 5–10, 10–
15 cm) sediments. Comparison of sediment trace element concentrations with consensus-based threshold effect
concentration (TEC) and probable effect concentration (PEC) values showed that lake biota may be under threat
of contamination with As, Cu and Ni.
Given the present results, we cannot recommend/confirm the application of Lake Dojran dark mud sediment in
balneotherapeutic treatments.

Item Type: Article
Subjects: Natural sciences > Earth and related environmental sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Todor Serafimovski
Date Deposited: 10 Sep 2015 08:26
Last Modified: 10 Sep 2015 08:26
URI: https://eprints.ugd.edu.mk/id/eprint/13788

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