Influence of transboundary transport of trace elements on mountain peat geochemistry (Sudetes, Central Europe)

QUATERNARY SCIENCE REVIEWS

卷:230

Article

Fialkiewicz-Koziel, Barbara¹  Lokas, Edyta²  Galka, Mariusz³  Kolaczek, Piotr¹  De Vleeschouwer, Francois⁴  Le Roux, Gael⁵  Smieja-Krol, Beata⁶ 

[1] Adam Mickiewicz Univ, Fac Geog & Geol Sci, Krygowskiego 10, Poznan, Poland

[2] Polish Acad Sci, Inst Nucl Phys, Radzikowskiego 152, PL-31342 Krakow, Poland

[3] Univ Lodz, Fac Biol & Environm Protect, Dept Geobot & Plant Ecol, Banacha 12-16, Lodz, Poland

[4] Univ Buenos Aires, CONICET, CNRS, UMI,IFAECI, Intendente Guiraldes 2160,Ciudad Univ,Pabellon 2, Buenos Aires, DF, Argentina

[5] Univ Toulouse, CNRS, INPT, EcoLab,UPS, Toulouse, France

[6] Univ Silesia, Inst Earth Sci, Fac Nat Sci, Bedzinska 60, PL-41200 Sosnowiec, Poland

关键词: Peat bog;    Sources of pollution;    Lead isotopes;    REE;    Uranium;    Spheroidal aluminosilicates;    Radionuclides;    European black triangle;   

DOI  :  10.1016/j.quascirev.2020.106162

来源: Elsevier

【 摘 要 】

Mountain ombrotrophic peatlands in Central Europe are an important stock of transboundary contamination both of natural and anthropogenic origin. The Snieika Mountain (West Sudetes) forms a significant orographic barrier and receives aerosols from broadly-recognized anthropogenic sources (production and use of stainless steel, processing of uranium, coal combustion, nuclear weapon tests, and Chernobyl accident). The main objective of the study was to assess the pattern of distribution and origin of trace elements and to distinguish the long-range transport vs. local signals in two Pb-210 and C-14 - dated peat cores from the highest summit of the Karkonosze (West Sudetes) spanning the last 280 years. Maximum values and accumulations of almost all investigated elements (Pb, Zn, Cu, Ni, Cr, Ti, Al, U, Sc, and REE) were identified around the 1970s. The analysis of peat using scanning electron microscopy (SEM) confirmed the occurrence of spheroidal aluminosilicate fly ash particles (SAP) in the topmost 40 cm (from AD 1938) together with a maximum of mullite (3Al(2)O(3)center dot 2SiO(2)), an anthropogenic marker originating from coal-based power plants. The overall Pb-206/Pb-207 signature ranges from 1.160 to 1.173, indicating a predominant contribution of anthropogenic Pb. Human activities promote the release of mobile U-234, due to the weaker bonds to mineral structure, and cause the radiogenic disequilibrium between U-238 and its daughter U-234. (C) 2020 The Authors. Published by Elsevier Ltd.

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