In Situ Measurement with Diffusive Gradients in Thin Films: Effect of Biofouling in Freshwater

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2017 Apr 14

PMID 28405923

Citations 1

Authors

Emmanuelle Uher

Chantal Compere

Matthieu Combe

Florence Mazeas

Catherine Gourlay-France

Affiliations

Soon will be listed here.

Abstract

Concerning in situ passive sampler deployment, several technical priorities must be considered. In particular, deployment time must be sufficiently long not only to allow a significant quantity to be accumulated to facilitate analysis but also to ensure that the signal is above the quantification limit and out of the blank influence. Moreover, regarding the diffusive gradient in thin films (DGT) technique, deployment time must also be sufficiently long (at least 5 days) to avoid the interactions of the solutes with the material diffusion layer of the DGT and for the steady state to be reached in the gel. However, biofouling occurs in situ and modifies the surface of the samplers. In this article, we propose a kinetic model which highlights the biofouling effect. This model was able to describe the mitigation of the flux towards the DGT resin observed on Cd, Co, Mn, Ni and Zn during a 22-day deployment in the Seine River. Over a period of 22 days, biofouling had a significant impact on the DGT concentrations measured, which were decreased twofold to threefold when compared to concentrations measured in unaffected DGTs.

Citing Articles

Concurrent sampling of transitional and coastal waters by Diffusive Gradient in Thin-films (DGT) and spot sampling for trace metals analysis.

Bersuder P, Amouroux I, Belzunce-Segarra M, Bolam T, Caetano M, Carvalho I MethodsX. 2021; 8:101462.

PMID: 34434867 PMC: 8374686. DOI: 10.1016/j.mex.2021.101462.

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