期刊
JOURNAL OF GEOCHEMICAL EXPLORATION
卷 110, 期 3, 页码 278-289出版社
ELSEVIER
DOI: 10.1016/j.gexplo.2011.06.009
关键词
Trace elements; Alluvial plains; River terraces; Multivariate statistics; The Drava River
资金
- Ministry of Higher Education, Science and Technology of the Republic of Slovenia [BI-HR/07-08-002]
- Ministry of Science, Education and Sports. Republic of Croatia [BI-HR/07-08-002, 181-1811096-1181]
- Ministry of Science, Education and Sports. Republic of Croatia
The objectives of this study are as follows: (a) an assessment of the geochemical background signature of the Drava Valley before the industrial revolution; (b) an evaluation of anthropogenic geochemical influences on the alluvial plains and river terraces in the valley; and (c) a determination of the spatial distribution of trace elements in the alluvial soils of the Drava River downstream of the Austrian-Slovenian border to the confluence of Mura and Drava Rivers. Samples of topsoil (depth of 0-5 cm) and subsoil (depth of 20-30 cm) were collected from 134 sampling sites on alluvial plains and river terraces. Analysis for 41 chemical elements was performed. Based on a comparison of statistical parameters, the spatial distribution of particular elements and the results of factor analysis, one anthropogenic and three natural geochemical associations were identified. The anthropogenic association (As-Ba-Cd-Mo-Pb-Sb-Zn) is mostly a result of historical zinc and lead mining and smelting in the Drava River watershed. The natural geochemical associations (Al-Fe-K-Co-Cr-Cu-Li-Ni-Rb-Sc-Th, Ti-Ce-La-Nb-Ta and Ca-Mg-Sr) were mainly influenced by lithology. The entire assessed area of about 130 km(2) is, according to Slovenian and Croatian legislation, critically polluted with trace elements, especially zinc. (C) 2011 Elsevier B.V. All rights reserved.
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