Hidrológiai Közlöny, 2014 (94. évfolyam)
2014 / 5-6. különszám - LV. Hidrobiológus Napok előadásai
20 HIDROLÓGIAI KÖZLÖNY 2014. 94. ÉVF. 5-6. SZ. 4Department of Chemistry and Environmental Science, Institute of Geography and Environmental Sciences, Faculty of Natural Sciences, University of West Hungary, Károlyi Gáspár tér 4,9700. Szombathely, Hungary Abstract: The oxbows of the Upper Tisza region in Hungary are unique natural wetlands in Europe. The aim of our study was the analysis of toxic element contents of surface sediment. The following five oxbows were studied in the Upper Tisza Region: Boroszló-kerti- Holt-Tisza, Foltos-kerti-Holt-Tisza, Gyürei-Holt-Tisza, Vargaszegi-Holt-Tisza, Lónyai-morotva. The first two oxbows are protected, while the last three oxbows are under anthropogenic influence. The surface sediment samples were collected with core sampling set in June in 2013. The toxic elements contents were measured with MP-AES and the following elements were analysed: Cu, Pb, Zn, Al, Fe, Mn and Sr. Based on the results of principal component analysis (PCA) oxbows are separated from each other. Significantly higher Cu and Fe concentration was found in the Foltos-kerti- and in the Boroszló-kerti-Holt-Tisza than in other oxbows. While, the Zn and Pb concentration was the highest in the Lónyai-morotva, and the Sr concentration was the highest in the Varga- szegi-Holt-Tisza. The Al concentration in the Boroszló-kerti-Holt-Tisza, while the Mn concentration in the Foltos-kerti-Holt-Tisza was the highest. In summary, our results demonstrated that the anthropogenic activities have significant effects on the toxic elements contents of the studied and the sediment is suitable for monitoring these effects because it accumulates toxic elements. Keywords: Upper Tisza region, heavy metal, sediment. táblázat. A toxikus elemek koncentrációja (átlag ± SD) vizsgált holtmedrek lágy üledékében. Foltos-kerti- Lónyai- Vargaszegi-Holt-Tisza Gyürei-HoltHolt-Tisza morotva Tisza 260 ± 22ac 259 ± 32 3C 239 ± 31bc Ba (mg/kg) 2206 ±276 3 2080 ± 293 3 2005±1543 1964 ±312 3 1863±396 ‘ Fe (g/kg) 744 ± 74 3 683 ± 65 3C 566 ± 35 b 613 ± 102 bc 562 ± 89 b Cr (mg/kg) 78 ±5,3 3 77 ± 3,63 79 ±3,73 74 ± 6,5 3 75 ±103 Cu (mg/kg) 70 ± 13 3 62 ± 6,9 ab 55 ± 3,4b 55 ± 9,3 b 48 ± 6,9 bc Mn (g/kg) 20 ± 6,03 21 ±7,1 3 11 ± 2,7 bc 11 ± 4,2 bd 14 ± 5,2 acd Pb (mg/kg) 75 ± 13 3 83 ± 26 ab 104 ± 13bc 82 ± 33 ab 95 ± 5,3 3C 344 ± 38 a 317 ± 45 3 418 ± 58 b 284 ± 313 490±108b
