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Study of potential harmful elements (arsenic, mercury and selenium) in surface sediments from Serbian rivers and artificial lakes

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2017
5_10.1016.gexplo.2017.06.006.pdf (1.127Mb)
Authors
Sakan, Sanja
Sakan, Nenad
Anđelković, Ivan
Trifunović, Snežana
Đorđević, Dragana
Article (Accepted Version)
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Abstract
This investigation examines surface sediment samples from rivers and artificial lakes (Serbia) to quantify levels of potentially harmful elements (As, Hg, and Se) and several ancillary elements (Al, Fe, Mn, Ca, Mg, C, H, N, and S). These data provide the first global analysis of Hg, As and Se levels in a well-studied system. Combination of different methods was applied for estimation of the environmental status of sediments and to determine the potential risk of ecological damage: digestion with aqua regia and determination of element content, determination of elements mobile forms by ammonium-acetate extraction, calculation of contamination indexes - index of geoaccumulation and enrichment factor, comparison with sediment quality guidelines and other literature data, and use of statistical methods. Results indicate that the sediments are slightly enriched with As and Hg, but not with Se. Fact that values for Se contents was less than the international threshold levels, suggesting the ...very probable absence of risk of contamination over the catchment with this element. The average pollution levels in Serbian river and artificial lakes expressed in terms of geoaccumulation indexes of As and Hg indicate that the environment is uncontaminated to moderately contaminated. All values of EF for Hg were below 2, indicating deficiency to minimal enrichment with Hg on studied localities. The EF values of As indicate deficiency to moderate enrichment (EF ranged from 0.11 to 3.54). According to the comparison to quality standard, the As in sediments of the studied area have potential risk. High content of arsenic in river and lake sediments indicate that arsenic pollution problem that lasts longer period of time.

Keywords:
Arsenic / Mercury / Selenium / Sediment / River / Se:Hg ratio / S:Se ratio
Source:
Journal of Geochemical Exploration, 2017, 180, 24-34
Publisher:
  • Elsevier Science Bv, Amsterdam
Projects:
  • The study of physicochemical and biochemical processes in living environment that have impacts on pollution and the investigation of possibilities for minimizing the consequences (RS-172001)
  • Studying climate change and its influence on environment: impacts, adaptation and mitigation (RS-43007)
Note:
  • Sanja Sakan, Nenad Sakan, Ivan Anđelković, Snežana Trifunović, Dragana Đorđević , Study of potential harmful elements (arsenic, mercury and selenium) in surface sediments from Serbian rivers and artificial lakes, Journal of Geochemical Exploration (2017), Journal of Geochemical Exploration, 2017, 180, 24-34, https://dx.doi.org/10.1016/j.gexplo.2017.06.006
  • http://cer.ihtm.bg.ac.rs/handle/123456789/2145

DOI: 10.1016/j.gexplo.2017.06.006

ISSN: 0375-6742

WoS: 000405536000003

Scopus: 2-s2.0-85020815732
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3031
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