Environmental Geology

, Volume 51, Issue 4, pp 527–536

Assessment of mercury mobility and bioavailability by fractionation method in sediments from coastal zone inundated by the 26 December 2004 tsunami in Thailand

  • Leonard Boszke
  • Artur Kowalski
  • Witold Szczuciński
  • Grzegorz Rachlewicz
  • Stanisław Lorenc
  • Jerzy Siepak
Original Article

DOI: 10.1007/s00254-006-0349-3

Cite this article as:
Boszke, L., Kowalski, A., Szczuciński, W. et al. Environ Geol (2006) 51: 527. doi:10.1007/s00254-006-0349-3

Abstract

The 26 December 2004 tsunami covered significant portion of a coastal zone with a blanket of potentially contaminated sediments. In this report are presented results on mercury concentrations in sediments deposited by the tsunami in a coastal zone of Thailand. Since the total mercury concentrations are insufficient to assess mercury mobility and bioavailability in sediment, its fractionation was applied. Sediments were sampled within 50 days after the event and analyzed by sequential extraction method. The procedure of sequential extraction involved five subsequent stages performed with solutions of chloroform, deionized water, 0.5 M HCl, 0.2 M NaOH, and aqua regia. The mean concentration of total mercury in sediments was 119 ± 50 ng g−1 dry mass (range 66–230). The fractionation revealed that mercury is mainly bound to the least bioavailable sulphides 75 ± 6% (range 62–86), organomercury compounds 14 ± 7% (range 4–26), and humic matter 9 ± 7% (range 1–27). The lowest contributions bring fractions of water-soluble mercury 0.8 ± 1.0% (range 0.1–3.6) and acid soluble mercury 0.9 ± 0.5% (range 0.2–2.1). Although, the total mercury content is similar in a reference sample and in the tsunami sediments, the highly toxic organomercury fraction contribution is higher in the latter. The results were compared with chemical and sedimentological properties of the sediments but no significant correlations were obtained between them.

Keywords

Mercury Fractionation Sequential extraction Tsunami sediments Thailand 

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Leonard Boszke
    • 1
  • Artur Kowalski
    • 2
  • Witold Szczuciński
    • 3
  • Grzegorz Rachlewicz
    • 4
  • Stanisław Lorenc
    • 3
  • Jerzy Siepak
    • 2
  1. 1.Department of Environmental Protection, Collegium PolonicumAdam Mickiewicz UniversitySłubicePoland
  2. 2.Department of Water and Soil Analysis, Faculty of ChemistryAdam Mickiewicz UniversityPoznańPoland
  3. 3.Institute of GeologyAdam Mickiewicz UniversityPoznańPoland
  4. 4.Institute of Paleogeography and GeoecologyAdam Mickiewicz UniversityPoznańPoland

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