Different Hg isotopes and DGT were used to establish pathways and bioaccumulation of Hg and CH3Hg in a freshwater wetland, while in another study DGT was used to assess bioavailability and bioaccumulation of Hg in plants within aquatic systems.
Neal-Walthall, N; Ndu, U; Rivera, NA; Elias, DA; Hsu-Kim, H, Utility of Diffusive Gradient in Thin-Film Passive Samplers for Predicting Mercury Methylation Potential and Bioaccumulation in Freshwater Wetlands, Environ. Sci. Technol. 2022, 56, 3, 1743–1752.
DGT was used as a tool to simultaneously quantify the methylation potential of inorganic Hg (IHg) and the bioaccumulation potential of MeHg in freshwater wetlands. Correlations were observed between total Hg-DGT uptake flux and MeHg levels in periphyton biofilms, submergent plant stems, snails, and mosquitofish in the ecosystem. The results demonstrated that DGT passive samplers are a relatively simple and efficient tool for predicting IHg methylation and MeHg bioaccumulation potentials without the need to explicitly delineate IHg and MeHg speciation and partitioning in complex ecosystems.
Pelcova, P; Kopp, R; Ridoskova, A; Grmela, J; Sterbova, D, Evaluation of mercury bioavailability and phytoaccumulation by means of a DGT technique and of submerged aquatic plants in an aquatic ecosystem situated in the vicinity of a cinnabar mine, Chemosphere, 2022, 288, 132545. doi: 10.1016/j.chemosphere.2021.132545.
The ability of three submerged aquatic plants and a natant plant to bioaccumulate mercury was evaluated in a laboratory experiment as well as in a real aquatic ecosystem situated in the vicinity of a cinnabar mine. A strong positive correlation (r > 0.66) was determined between mercury concentration in the input parts (leaves and/or roots) of the aquatic plants and the flow of mercury into DGT units.