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Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems

The increasing use of gadolinium (Gd)-based contrast agents in magnetic resonance imaging and the recalcitrant behavior of Gd during municipal wastewater treatment have led to increased concentrations of the tracer in aquatic environments. These anthropogenic Gd emissions to wastewater and, subseque...

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Autores principales: Marazuela, Miguel Ángel, Stockhausen, Martin, Hofmann, Thilo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9791803/
https://www.ncbi.nlm.nih.gov/pubmed/36578291
http://dx.doi.org/10.1016/j.mex.2022.101965
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author Marazuela, Miguel Ángel
Stockhausen, Martin
Hofmann, Thilo
author_facet Marazuela, Miguel Ángel
Stockhausen, Martin
Hofmann, Thilo
author_sort Marazuela, Miguel Ángel
collection PubMed
description The increasing use of gadolinium (Gd)-based contrast agents in magnetic resonance imaging and the recalcitrant behavior of Gd during municipal wastewater treatment have led to increased concentrations of the tracer in aquatic environments. These anthropogenic Gd emissions to wastewater and, subsequently, to surface and groundwater systems can be exploited to calculate groundwater travel times and mixing ratios, identify wastewater inputs, and calibrate groundwater models. However, analytical complexity, costs, and the time needed to directly measure anthropogenic inputs hinder the practical use of Gd. While direct measurements with inductively coupled plasma-mass spectrometry (ICP-MS) are highly efficient and feasible, only total Gd can be detected with this approach. In unknown hydrogeological systems, the differentiation between total, anthropogenic, and geogenic Gd by interpolating rare earth element patterns requires complex sample pre-treatment and pre-concentration. Direct measurements of Gd can be obtained using anion-exchange chromatography coupled to ICP-MS but the limit of quantification will be higher. Here we provide guidelines for selecting the optimal method for the analysis of Gd as a wastewater tracer in surface-groundwater systems. • The cost-effectiveness of existing analytical strategies to measure Gd when used as a wastewater tracer in surface-groundwater systems is addressed; • A novel analytical strategy for direct determination of total Gd is presented.
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spelling pubmed-97918032022-12-27 Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems Marazuela, Miguel Ángel Stockhausen, Martin Hofmann, Thilo MethodsX Environmental Science The increasing use of gadolinium (Gd)-based contrast agents in magnetic resonance imaging and the recalcitrant behavior of Gd during municipal wastewater treatment have led to increased concentrations of the tracer in aquatic environments. These anthropogenic Gd emissions to wastewater and, subsequently, to surface and groundwater systems can be exploited to calculate groundwater travel times and mixing ratios, identify wastewater inputs, and calibrate groundwater models. However, analytical complexity, costs, and the time needed to directly measure anthropogenic inputs hinder the practical use of Gd. While direct measurements with inductively coupled plasma-mass spectrometry (ICP-MS) are highly efficient and feasible, only total Gd can be detected with this approach. In unknown hydrogeological systems, the differentiation between total, anthropogenic, and geogenic Gd by interpolating rare earth element patterns requires complex sample pre-treatment and pre-concentration. Direct measurements of Gd can be obtained using anion-exchange chromatography coupled to ICP-MS but the limit of quantification will be higher. Here we provide guidelines for selecting the optimal method for the analysis of Gd as a wastewater tracer in surface-groundwater systems. • The cost-effectiveness of existing analytical strategies to measure Gd when used as a wastewater tracer in surface-groundwater systems is addressed; • A novel analytical strategy for direct determination of total Gd is presented. Elsevier 2022-12-08 /pmc/articles/PMC9791803/ /pubmed/36578291 http://dx.doi.org/10.1016/j.mex.2022.101965 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Environmental Science
Marazuela, Miguel Ángel
Stockhausen, Martin
Hofmann, Thilo
Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
title Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
title_full Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
title_fullStr Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
title_full_unstemmed Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
title_short Analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
title_sort analytical strategies to measure gadolinium as a wastewater marker in surface and groundwater systems
topic Environmental Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9791803/
https://www.ncbi.nlm.nih.gov/pubmed/36578291
http://dx.doi.org/10.1016/j.mex.2022.101965
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