Contamination of tsunami sediments in a coastal zone inundated by the 26 December 2004 tsunami in Thailand |
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| Authors: | Witold Szczuciński Przemys?aw Niedzielski Grzegorz Rachlewicz Tadeusz Sobczyński Anetta Zio?a Artur Kowalski Stanis?aw Lorenc Jerzy Siepak |
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| Institution: | (1) Institute of Geology, A. Mickiewicz University, Maków Polnych 16, 61-686 Poznań, Poland;(2) Department of Water and Soil Analysis, A. Mickiewicz University, Drzymały 24, 60-613 Poznań, Poland;(3) Institute of Paleogeography and Geoecology, A. Mickiewicz University, Dzięgielowa 27, 61-680 Poznań, Poland;(4) Collegium Polonicum, A. Mickiewicz University, Kościuszki 1, 69-100 Słubice, Poland |
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| Abstract: | Tsunami sediments deposited in a coastal zone of Thailand by the 26 December 2004 tsunami wave were sampled within 50 days after the event. All surface and ground waters in tsunami- inundated zone revealed significant salinity at that time. The tsunami sediments, composed mainly of fine to medium sand, contain significantly elevated contents of salts (Na+, K+, Ca+2, Mg+2, Cl and SO
4
−2
) in water-soluble fraction, and of Cd, Cu, Zn, Pb in the bioavailable fraction and As in the exchangeable fraction in relation to the reference sample. The origin of contaminants is marine, as well as litho- and anthropogenic. The salts and Pb, Zn and Cu reveal high correlation to each other and to the mean grain size (pore size and porosity). Serious environmental hazard exists in that region because, due to gentle morphology, there is a risk of migration of the contaminants into ground waters and food chain. |
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| Keywords: | Contamination Tsunami sediments Thailand |
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