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Influence of Transboundary Transport of Trace Elements on Mountain Peat Geochemistry (Sudetes, Central Europe)

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Influence of Transboundary Transport of Trace Elements on Mountain Peat Geochemistry (Sudetes, Central Europe) Title: Influence of transboundary transport of trace elements on mountain peat geochemistry (Sudetes, Central Europe) Author: Barbara Fiałkiewicz-Kozieł, Edyta Łokas, Mariusz Gałka, Piotr Kołaczek, Francois De Vleeschouwer, Gael Le Roux, Beata Śmieja-Król Citation style: Fiałkiewicz-Kozieł Barbara, Łokas Edyta, Gałka Mariusz, Kołaczek Piotr, De Vleeschouwer Francois, Le Roux Gael, Śmieja-Król Beata. (2020). Influence of transboundary transport of trace elements on mountain peat geochemistry (Sudetes, Central Europe). “Quaternary Science Reviews” (Vol. 230 (2020), Art. No. 106162), doi 10.1016/j.quascirev.2020.106162 Quaternary Science Reviews 230 (2020) 106162 Contents lists available at ScienceDirect Quaternary Science Reviews journal homepage: www.elsevier.com/locate/quascirev Influence of transboundary transport of trace elements on mountain peat geochemistry (Sudetes, Central Europe) * Barbara Fiałkiewicz-Kozieł a, , Edyta Łokas b, Mariusz Gałka c, Piotr Kołaczek a, Francois De Vleeschouwer d, Gael Le Roux e, Beata Smieja-Krol f a Adam Mickiewicz University, Faculty of Geographical and Geological Sciences, Krygowskiego 10, Poznan, Poland b Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342, Krakow, Poland c University of Lodz, Faculty of Biology and Environmental Protection, Department of Geobotany and Plant Ecology, Banacha 12/16, Lodz, Poland d Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (UMI IFAECI/CNRS-CONICET-UBA), Universidad de Buenos Aires, Intendente Guiraldes 2160, Ciudad Universitaria, Pabellon II - 2do. Piso, (C1428EGA) Ciudad Autonoma de Buenos Aires, Argentina e EcoLab, Universite de Toulouse, CNRS, INPT, UPS, Toulouse, France f University of Silesia, Institute of Earth Sciences, Faculty of Natural Sciences, Be˛dzinska 60, 41-200, Sosnowiec, Poland article info abstract Article history: Mountain ombrotrophic peatlands in Central Europe are an important stock of transboundary contam- Received 19 July 2019 ination both of natural and anthropogenic origin. The Sniezka_ Mountain (West Sudetes) forms a sig- Received in revised form nificant orographic barrier and receives aerosols from broadly-recognized anthropogenic sources 14 November 2019 (production and use of stainless steel, processing of uranium, coal combustion, nuclear weapon tests, and Accepted 1 January 2020 Chernobyl accident). The main objective of the study was to assess the pattern of distribution and origin Available online xxx of trace elements and to distinguish the long-range transport vs. local signals in two 210Pb and 14C e dated peat cores from the highest summit of the Karkonosze (West Sudetes) spanning the last 280 years. Keywords: Peat bog Maximum values and accumulations of almost all investigated elements (Pb, Zn, Cu, Ni, Cr, Ti, Al, U, Sc, fi Sources of pollution and REE) were identi ed around the 1970s. The analysis of peat using scanning electron microscopy Lead isotopes (SEM) confirmed the occurrence of spheroidal aluminosilicate fly ash particles (SAP) in the topmost REE 40 cm (from AD 1938) together with a maximum of mullite (3Al2O3$2SiO2), an anthropogenic marker Uranium originating from coal-based power plants. The overall 206Pb/207Pb signature ranges from 1.160 to 1.173, Spheroidal aluminosilicates indicating a predominant contribution of anthropogenic Pb. Human activities promote the release of Radionuclides mobile 234U, due to the weaker bonds to mineral structure, and cause the radiogenic disequilibrium European black triangle between 238U and its daughter 234U. © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). 1. Introduction particles can be transported from hundreds to thousands of kilo- metres, passing through cities, states, and countries, and Industrial activities caused dramatic changes in ecosystems, strengthen the local pollution (Munn, 1972; Erel et al., 2002, 2006; releasing uncontrolled amounts of trace elements influencing both Bergin et al., 2005). It results in a more global, uniform pollutant biotic and abiotic components (Rose, 2015; Waters et al., 2016, signal over continents for certain pollutants (i.e. contaminants 2018). carried by submicronic aerosols: artificial radionuclides, lead Atmospheric pollutants are transported by wind and dispersed derived from the combustion of leaded gasoline). at different geographical scales. The range of dispersion is depen- Mountain ecosystems such as lakes and peatlands are sensitive dent on the size of the particle and its chemical behaviour in the air archives of long-range transport (Arellano et al., 2011; Catalan et al., (Samson, 1988). Larger particles are generally deposited close to the 2013; Le Roux et al., 2016; Okamoto and Tanimoto, 2016). emitter (Samson, 1988) while regionally-recognized lighter Notwithstanding, the received input of dust depends on height above sea level (a.s.l.). The altitudes between 0 and ~2000 m a.s.l. are mainly subjected to vertical transport of Potentially Harmful Trace Elements (PHTE) (Le Roux et al., 2016). The free tropospheric * Corresponding author. zone, located above 2000 m a.s.l. is characterised by more lateral E-mail address: [email protected] (B. Fiałkiewicz-Kozieł). https://doi.org/10.1016/j.quascirev.2020.106162 0277-3791/© 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). 2 B. Fiałkiewicz-Kozieł et al. / Quaternary Science Reviews 230 (2020) 106162 transport of PHTE (Catalan et al., 2013; Le Roux et al., 2016) and in Europe due to the uncontrolled density of factories and power ecosystems located there receive dust mostly from long-range plants, which, working without filters, released enormous amounts transport. The mutual effect of different climate factors like wind of alkali dust and toxic gases (mainly SO2) in the atmosphere trajectories and precipitation play the most important role in (Je˛drysek et al., 2002; Szynkiewicz et al., 2008). 0 00 mountain pollution (Catalan et al., 2013; Le Roux et al., 2016). The Na Rowni pod Sniezka_ ˛ (NRS) peatland (50 44 18,31 N, Peat bogs, exclusively fed by dry and wet atmospheric deposi- 1541059,7200E) is located on a plateau (1350e1450 m a.s.l.) in the tion, are significant biological filters and traps for PHTE and other Karkonosze range, close to the highest summit of Mt Sniezka_ elements. They give essential information about past and present (1602 m a.s.l.). The Karkonosze area is ~60 km long and up to 20 km changes in the environment, especially when applying a multi- wide granitic massif in the West Sudetes at the northern periphery proxy approach (Lamentowicz et al., 2013; Gałka et al., 2019). of the Bohemian Massif, straddling the Czech/Polish border and Mountain peat bogs, located on plateaus, where the slope effect is forming the eastern extremity of the European Variscan belt minimal, are great archives of geochemical records of various origin (Mazur et al., 2006). The Karkonosze unit was lifted during Alpine (Le Roux et al., 2016). orogeny, forming currently a steep rocky mountain range with The calculated accumulation of peat and, therefore, accumula- numerous glacial landforms. Consequently, it is a significant tions of elements enable to assess the past trends in pollution as orographic barrier for different types of air masses. During the 64% well as to assess the sources of observed enrichments (e.g. Shotyk of the year, the area is directly influenced by the zonal circulation of et al., 1998, 2002). REE elements are believed to be good in- oceanic air masses from the North Atlantic, flowing over the low- dicators of lithogenic activity and natural sources of dust (e.g. Le lands of Western Europe. 30% of the year is characterised by the Roux et al., 2012; Pratte et al., 2017; Vanneste et al., 2016), but they influence of polar continental air masses, flowing from the east, 4%- can also be indicators of anthropogenic activity (e.g. Fiałkiewicz- by arctic air from the north and 2% - by tropical air masses, coming Kozieł et al., 2016). from the south (Sobik et al., 2014). The mean annual air tempera- The Sudetes (located at the border of Poland, the Czech Republic, ture at Mt. Sniezka_ is þ0.5 C and the annual precipitation and Germany) are an important region with long-time traditions of ~1500 mm (Sobik et al., 2014; Migała et al., 2016). The dominated mining and ore processing (i.e. Fe, Cu, Pb, U, and Au) that may have winds are the westerlies, amongst which SW and S winds domi- had a great effect on PHTE deposited onto mountains. This moun- nated while NW and W are less frequent (Schwartz et al., 1994; tain range is additionally surrounded by economically significant Sobik et al., 2014, Fig. 1). industrial centres and lignite-fired power plants, causing dramatic deterioration of environment in the 1970s and 1980s in Poland, the Czech Republic, and Germany. Due to dramatic environmental 2.2. Coring and subsampling impact this area (e.g. Mazurski, 1986), named “Black Triangle” (BT), was qualified by the United Nations Environment Programme Two cores of 63 and 67 cm long (Sn1 and Sn2, respectively), were retrieved in the spring of 2012 using a stainless steel (UNEP) as an “ecological disaster zone” (Grübler, 2002; Kolar et al., 10 Â 10 Â 100 cm Wardenaar corer (Wardenaar, 1987). The distance 2015). Sparse investigations about mineralogy, pollen analysis, between them was 20 m. Monoliths were wrapped in plastic bag, sulfur and carbon isotopes exist (i.e., Popowski, 2005; Skrzypek et al., 2009; Kajukało et al., 2016), but information about past transported to the laboratory in Poznan (UAM), and stored in the PHTE contamination in peat bogs from the Sudetes is scarce (i.e. laboratory cooler. Fresh cores were cut into 1-cm thick slices Strzyszcz and Magiera, 2001; Fiałkiewicz-Kozieł et al., 2015a). The (except the top 6 cm, which were cut on 2 cm slices) using a carbon most detailed anthropogenic signal in central Europe was esti- steel knife.
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