scholarly journals Evaluation of Discrete and Passive Sampling (Diffusive Gradients in Thin-films – DGT) Approach for the Assessment of Trace Metal Dynamics in Marine Waters – a Case Study in a Small Harbor

2017 ◽  
Vol 90 (2) ◽  
Author(s):  
Ana-Marija Cindrić ◽  
Neven Cukrov ◽  
Gaël Durrieu ◽  
Cédric Garnier ◽  
Ivanka Pižeta ◽  
...  
Keyword(s):  
Thin Films ◽  
Trace Metal ◽  
Passive Sampling ◽  
Marine Waters ◽  
Diffusive Gradients

scholarly journals A new method based on diffusive gradients in thin films for in situ monitoring microcystin-LR in waters

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lei Yao ◽  
Alan D. Steinman ◽  
Xiang Wan ◽  
Xiubo Shu ◽  
Liqiang Xie
Keyword(s):  
Thin Films ◽  
Passive Sampling ◽  
Sampling Method ◽  
Binding Capacity ◽  
Accurate Method ◽  
In Situ Monitoring ◽  
Active Sampling ◽  
Binding Agent ◽  
Diffusive Gradients

AbstractThe passive sampling method of diffusive gradients in thin-films (DGT) was developed to provide a quantitative and time-integrated measurement of microcystin-LR (MC-LR) in waters. The DGT method in this study used HLB (hydrophilic-lipophilic-balanced) material as a binding agent, and methanol as an eluent. The diffusion coefficient of MC-LR was 5.01 × 10−6 cm2 s−1 at 25 °C in 0.45 mm thick diffusion layer. This DGT method had a binding capacity of 4.24 μg per binding gel disk (3.14 cm2), ensuring sufficient capacity to measure MC-LR in most water matrices. The detection limit of HLB DGT was 0.48 ng L−1. DGT coupled to analysis by HPLC appears to be an accurate method for MC-LR monitoring. Comparison of DGT measurements for MC-LR in water and a conventional active sampling method showed little difference. This study demonstrates that HLB-based DGT is a useful tool for in situ monitoring of MC-LR in fresh waters.

Response of diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT) trace metal profiles in sediments to phytodetritus mineralisation

2012 ◽  
Vol 9 (1) ◽  
pp. 41 ◽  
Author(s):  
Yue Gao ◽  
Martine Leermakers ◽  
Annelies Pede ◽  
Aurelie Magnier ◽  
Koen Sabbe ◽  
...  
Keyword(s):  
Thin Films ◽  
Trace Metals ◽  
Trace Metal ◽  
Phytoplankton Bloom ◽  
Marine Ecosystem ◽  
Trace Metal Concentration ◽  
Water Interface ◽  
Overlying Water ◽  
Study Laboratory ◽  
Diffusive Gradients

Environmental contextContaminated sediments can have a large and lasting effect on marine ecosystems. It was discovered that significant amounts of pollutants, especially arsenic, were released from contaminated sediments during a phytoplankton bloom in the Belgian Continental Zone. Once released to the water column, these pollutants can accumulate up marine food chains and be a source of contaminants to humans. AbstractField data from the Belgian Continental Zone showed elevated trace metal concentrations at the sediment–water interface after the occurrence of a phytoplankton bloom. In the present study, laboratory incubation experiments were used to investigate the effect of the phytodetritus remineralisation process on the release of trace metals from contaminated muddy sediments. This remineralisation process was followed by the measurement of chlorophyll-a and dissolved organic carbon levels in the top sediment layers. Two gel techniques, diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT), were used to assess vertical metal profiles in the sediment pore waters and to calculate the metal effluxes. These metal effluxes compared very well with the trace metal concentration variations in the overlying water of the sediment. Much higher effluxes of Mn, Co and As were observed after 2 days of incubation in the microcosms which received additions of phytodetritus. This trend gradually decreased after 7 days of incubation, suggesting that the elevated efflux of trace metals was proportional to the quantity of phytodetritus mineralised at the sediment–water interface. The release of large amounts of toxic elements from the sediments after phytoplankton blooms can therefore potentially affect the marine ecosystem in the Belgian Continental Zone.

Predicting trace metal bioavailability to chironomids in sediments by diffusive gradients in thin films

2018 ◽  
Vol 636 ◽  
pp. 134-141 ◽  
Author(s):  
Yan He ◽  
Changsheng Guo ◽  
Jiapei Lv ◽  
Song Hou ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Trace Metal ◽  
Metal Bioavailability ◽  
Diffusive Gradients

scholarly journals Assessment of trace metal binding kinetics in the resin phase of diffusive gradients in thin films

2012 ◽  
Vol 717 ◽  
pp. 143-150 ◽  
Author(s):  
Jacqueline L. Levy ◽  
Hao Zhang ◽  
William Davison ◽  
Jaume Puy ◽  
Josep Galceran
Keyword(s):  
Thin Films ◽  
Trace Metal ◽  
Metal Binding ◽  
Binding Kinetics ◽  
Resin Phase ◽  
Diffusive Gradients

scholarly journals Toward Validation of Toxicological Interpretation of Diffusive Gradients in Thin Films in Marine Waters Impacted by Copper

2020 ◽  
Vol 39 (4) ◽  
pp. 873-881 ◽  
Author(s):  
Jonathan Strivens ◽  
Nicholas Hayman ◽  
Gunther Rosen ◽  
Allison Myers‐Pigg
Keyword(s):  
Thin Films ◽  
Marine Waters ◽  
Diffusive Gradients

Dissolved iodide in marine waters determined with Diffusive Gradients in Thin-films technique

2021 ◽  
pp. 338790
Author(s):  
Josselin Gorny ◽  
Cyrielle Jardin ◽  
Olivier Diez ◽  
Josep Galceran ◽  
Alkiviadis Gourgiotis ◽  
...  
Keyword(s):  
Thin Films ◽  
Marine Waters ◽  
Diffusive Gradients

Passive sampling of anionic pesticides using the Diffusive Gradients in Thin films technique (DGT)

2017 ◽  
Vol 966 ◽  
pp. 1-10 ◽  
Author(s):  
Robin Guibal ◽  
Rémy Buzier ◽  
Adeline Charriau ◽  
Sophie Lissalde ◽  
Gilles Guibaud
Keyword(s):  
Thin Films ◽  
Passive Sampling ◽  
Diffusive Gradients
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