Isotope variations of dissolved Zn in the Rio Grande watershed, USA: The role of adsorption on Zn isotope composition

Szynkiewicz, Anna; Borrok, David M.

doi:10.1016/j.epsl.2015.10.050

Cited by 33 publications

(25 citation statements)

References 64 publications

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“…For Zn analyses, 62 Ni was measured to monitor a potential interference on 64 Zn from 64 Ni, and mass 68.5 measured to monitor potential interferences from doubly charged Ba species on Zn isotopes. For Ni, 56 Fe was measured as a monitor of a potential interference from 58 Fe on 58 Ni. In all cases, these measured interferences were negligible.…”

Section: Methodsmentioning

confidence: 99%

The oceanic budgets of nickel and zinc isotopes: the importance of sulfidic environments as illustrated by the Black Sea

Vance

Little

Archer

et al. 2016

Phil. Trans. R. Soc. A.

100

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Isotopic data collected to date as part of the GEOTRACES and other programmes show that the oceanic dissolved pool is isotopically heavy relative to the inputs for zinc (Zn) and nickel (Ni). All Zn sinks measured until recently, and the only output yet measured for Ni, are isotopically heavier than the dissolved pool. This would require either a non-steady-state ocean or other unidentified sinks. Recently, isotopically light Zn has been measured in organic carbon-rich sediments from productive upwelling margins, providing a potential resolution of this issue, at least for Zn. However, the origin of the isotopically light sedimentary Zn signal is uncertain. Cellular uptake of isotopically light Zn followed by transfer to sediment does not appear to be a quantitatively important process. Here, we present Zn and Ni isotope data for the water column and sediments of the Black Sea. These data demonstrate that isotopically light Zn and Ni are extracted from the water column, probably through an equilibrium fractionation between different dissolved species followed by sequestration of light Zn and Ni in sulfide species to particulates and the sediment. We suggest that a similar, non-quantitative, process, operating in porewaters, explains the Zn data from organic carbon-rich sediments.This article is part of the themed issue 'Biological and climatic impacts of ocean trace element chemistry'.

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Section: Methodsmentioning

confidence: 99%

The oceanic budgets of nickel and zinc isotopes: the importance of sulfidic environments as illustrated by the Black Sea

Vance

Little

Archer

et al. 2016

Phil. Trans. R. Soc. A.

100

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“…Weathering of the continents supplies solutes to rivers, which constitute a key input of Zn and Cu to the modern ocean (Little et al, 2014b). The Zn and Cu isotope composition of rivers will thus reflect that supplied by weathering, though biogeochemical processes in rivers may subsequently modify this primary signature (e.g., Borrok et al, 2008;Coutaud et al, 2014;Szynkiewicz and Borrok, 2016;Coutaud et al, 2018). The aim of this study is to investigate Zn and Cu isotope fractionation during extreme chemical weathering.…”

Section: Introductionmentioning

confidence: 99%

Cu and Zn isotope fractionation during extreme chemical weathering

Little

Munson

Prytulak

et al. 2019

Geochimica et Cosmochimica Acta

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“…Recently the improvements in Multiple Collector -Inductively Coupled Plasma -Mass Spectrometry (MC-ICP-MS) instrumentation allowed measurement of small isotope variations for non-traditional elements and isotopic compositions for elements present at low concentration in environmental samples. The isotopic signature of zinc (Zn) largely widespread in different anthropogenic effluents and environmental reservoirs (water, sediment, atmosphere…), and lead (Pb) toxic even at low levels to humans, are commonly used to track anthropogenic pollution in the environment (Aranda et al, 2012;Chen et al, 2008;Elbaz-Poulichet et al, 1986;Monna et al, 1995;Roy and Négrel, 2001;Szynkiewicz and Borrok, 2016). Given the very low content in Pb and Zn in natural waters (< 10 µg/l), a large volume of liquid (up to several liters) must be sampled to perform a single isotopic analysis by MC-ICP-MS.…”

Section: Introductionmentioning

confidence: 99%

Coupling DGT passive samplers and multi-collector ICP-MS: A new tool to measure Pb and Zn isotopes composition in dilute aqueous solutions

et al. 2017

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Using zinc (Zn) and lead (Pb) isotopes is a powerful tool to track metal pollution in environment. In this study we have developed the coupling between DGT passive samplers and multi-collector ICP-MS to measure Pb and Zn isotopic ratios in dilute aqueous solutions. The benefits of this coupling are multiple: the use of DGT device allows achieving an isotopic composition of natural water integrated over time and to pre-concentrate metals in situ. This development will greatly facilitate the field collection of samples and their preparations in cleanroom prior to their isotopic analyses. To test the capability of DGT samplers a series of experiments was achieved in cleanroom and in experimental pilot simulating a water flow. These tests have shown that there is no fractionation of Pb isotopes due to the use of DGT within the reported precision of MC-ICPMS measurements. For Zn, the diffusion process through a membrane, inherent to the use of DGT device, induces a fractionation between the isotopic composition obtained by the DGT and the natural composition. However, this bias can be easily corrected by using a simple relation independent of the time of exposure and the thickness of diffusion layer. The coupling DGT passive samplers and multi-collector ICP-MS is suitable to determine the Pb and Zn isotopic compositions in natural waters and offers new perspectives to track the anthropic pollutions in the hydrosphere.

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Isotope variations of dissolved Zn in the Rio Grande watershed, USA: The role of adsorption on Zn isotope composition

Cited by 33 publications

References 64 publications

The oceanic budgets of nickel and zinc isotopes: the importance of sulfidic environments as illustrated by the Black Sea

The oceanic budgets of nickel and zinc isotopes: the importance of sulfidic environments as illustrated by the Black Sea

Cu and Zn isotope fractionation during extreme chemical weathering

Coupling DGT passive samplers and multi-collector ICP-MS: A new tool to measure Pb and Zn isotopes composition in dilute aqueous solutions

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