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Bioavailability of mercury in contaminated soils assessed by the diffusive gradient in thin film technique in relation to uptake by Miscanthus × giganteus
Author(s) -
Ridošková Andrea,
Pelfrêne Aurélie,
Douay Francis,
Pelcová Pavlína,
Smolíková Vendula,
Adam Vojtěch
Publication year - 2019
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.4318
Subject(s) - environmental chemistry , mercury (programming language) , chemistry , soil water , diffusive gradients in thin films , miscanthus , contamination , bioavailability , metal , cadmium , soil contamination , environmental science , soil science , ecology , bioenergy , bioinformatics , organic chemistry , renewable energy , computer science , biology , programming language
We assessed the relationship between the diffusive gradient in thin film (DGT) technique using the new ion‐exchange resin Ambersep GT74 and the uptake of mercury (Hg) by a model plant cultivated on metal‐contaminated agricultural soils under greenhouse conditions. Based on the total Hg content, 0.37 to 1.17% of the Hg passed to the soil porewater from the solid phase, and 2.18 to 9.18% of the Hg is DGT‐available. These results were confirmed by calculating the R value (the ratio of the concentrations of bioavailable Hg measured by DGT and soil solution), which illustrated the strong bonding of Hg to the solid phase of soil and its extremely low mobility. Only inorganic Hg 2+ species were found in the metal‐contaminated agricultural soils, as determined by a high‐performance liquid chromatography–cold vapor atomic fluorescence spectrometry speciation analysis. The Hg was distributed in Miscanthus × giganteus organs in the following order for all sampling sites: roots (55–82%) >> leaves (8–27%) > stems (7–16%) > rhizomes (4–7%). Environ Toxicol Chem 2019;38:321–328. © 2018 SETAC