PMID: 15378992Sep 24, 2004Paper

Performance of diffusion gradient in thin films to evaluate the toxic fraction of copper to Daphnia magna

Environmental Toxicology and Chemistry
Marie-Hélène Tusseau-VuilleminJeanne Garric

Abstract

This study investigates the relevance of the diffusion gradient in thin films technique (DGT) to measure copper's induced lethality on Daphnia magna in natural water spiked with various organic ligands. Ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), and glycine were used as artificial organic ligands in controlled solutions of mineral water. With EDTA, DGT measurement makes it possible to predict the toxicity of the mixture because Cu-EDTA complexes are inert, whereas DGT is of no help in the case of NTA, because Cu-NTA complexes are fully labile. The Cu-glycine complexes appear as partly labile and toxic. Humic acids as well as fresh and aged algae extracts also were used as models for natural dissolved organic matters. All three of them form copper complexes that are not toxic to Daphnia magna and appear as partly labile with open-pored DGT. However, the use of restricted gels in DGT greatly reduces the contribution of labile complexes, at least for humic acids and aged algae copper complexes. The DGT with restrictive gels, therefore, appears to be a powerful tool for measuring bioavailable copper in natural water bodies, especially when the dissolved organic matter mostly is of humic origin. The DGTs po...Continue Reading

Citations

Jul 26, 2012·Environmental Science & Technology·Stuart L SimpsonDianne F Jolley
Aug 16, 2012·Environmental Science & Technology·David M CostelloW Keith Taulbee
Feb 6, 2007·The Science of the Total Environment·Marie-Hélène Tusseau-VuilleminFrançoise Elbaz-Poulichet
Oct 11, 2005·The Science of the Total Environment·Rémy BuzierJean-Marie Mouchel
Jan 17, 2012·Environmental Pollution·Lise C FechnerMarie-Hélène Tusseau-Vuillemin
Sep 17, 2011·Environmental Pollution·Adeline BourgeaultMarie-Hélène Tusseau-Vuillemin
Jan 1, 2017·Environmental Science and Pollution Research International·Ningning WangMengchang He

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