Investigations of the partitioning and residence times of Po-210 and Pb-210 in a riverine system in Southeast Michigan, USA

Measuring bismuth‐210, its parent, and daughter in aquatic systems

“…The total 210 Pb activity of 105 dpm m −3 on 20 November and the range of total (dissolved + particle‐bound) 210 Po activities from 56 to 58 dpm m −3 on 15 November and 20 November were in general agreement with other reported activities of total 210 Pb and 210 Po in Lake Superior (48–131 and 16–54 dpm m −3 , respectively; Chai and Urban 2004), the Clinton River in Michigan (90–684 and 78–438 dpm m −3 , respectively; Mudbidre et al 2014), and Crystal Lake in Wisconsin (113 ± 40 and 95 ± 47 dpm m −3 , respectively; Talbot and Andren 1984).…”

“…half-life of the nuclide and the speed at which the sample can be processed, and the degree of accuracy required by any specific application of the nuclide as a tracer (Waples and Orlandini 2010). Based on previous measurements of 210 Pb in Lake Superior (Chai and Urban 2004) and the Clinton River in southeastern Michigan (Mudbidre et al 2014), an initial estimate of~50 L of water was considered adequate for the analysis of both dissolved and particle-bound fractions of 210 Pb,210 Bi,and 210 Po in Lake Michigan.…”

A global dataset of atmospheric <sup>7</sup>Be and <sup>210</sup>Pb measurements: annual air concentration and depositional flux

“…However, as human activity intensifies, such undisturbed sites are not always readily available. In aquatic systems (including rivers, lakes, estuaries, and coasts), the mass balance models of 7 Be and 210 Pb ex have become powerful tools to understand the sediment source, transportation and resuspension processes (e.g., Wieland et al, 1991;Feng et al, 1999;Jweda et al, 2008;Huang et al, 2013;Mudbidre et al, 2014). In such models, the atmospheric depositional input of 7 Be and 210 Pb is a required source term.…”

“…In aquatic environments, 210 Pb is most widely used for dating recent sediments (e.g., Appleby, 2008). Meanwhile, 7 Be and 210 Pb are also widely used as tracers of sediment source identification and particle dynamics in rivers (e.g., Bonniwell et al, 1999;Jweda et al, 2008;Mudbidre et al, 2014;Baskaran et al, 2020), lakes (e.g., Dominik et al, 1987;Schuler et al, 1991;Vogler et al, 1996), and estuaries and coasts (e.g., Baskaran et al, 1997;Huang et al, 2013;Wang et al, 2016). 7 Be deposited on open ocean is further used as a tracer for diagnosing ocean ventilation and subduction (Kadko, 2000;Kadko and Olson, 1996), inferring upwelling rates (Kadko and Johns, 2011), and estimating the deposition of trace metals (Kadko et al, 2015;Shelley et al, 2017;Buck et al, 2019).…”

Ανάπτυξη / Βελτίωση Μεθοδολογίας Και Ανάλυση Ραδιονουκλιδίων Σε Υδατικά Δείγματα

“…ΠΑΡΟΥΣΙΑ 210 Pb ΚΑΙ 210 Po ΣΤΗΝ ΑΤΜΟΣΦΑΙΡΑΤα ραδιονουκλίδια210 Po και210 Pb είναι τα τελευταία μακρόβια ραδιονουκλίδια τη σειράς του 238 U και αν και η αφθονία τους δεν είναι τόσο υψηλή, βρίσκονται σε όλα τα φυσικά περιβάλλοντα[80]. Η παρουσία τους και η μετακίνησή τους στο περιβάλλον συνήθως εξετάζεται ταυτόχρονα διότι η εξέταση της ισορροπίας210 Po/210 Pb παρέχει πληροφορίες που ερμηνεύονται από διάφορες περιβαλλοντικές επιστήμες[34,74,81]. Η παρουσία τους στην ατμόσφαιρα οφείλεται στην διάσπαση του αέριου μητρικού τους222 Rn, το οποίο είναι και η κύρια πηγή τους.…”