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  • Title: Multi-metals Measured at Sediment-Water Interface (SWI) by Diffusive Gradients in Thin Films (DGT) Technique for Geochemical Research.
    Author: Wu Z, Jiao L, Wang S, Xu Y.
    Journal: Arch Environ Contam Toxicol; 2016 Feb; 70(2):429-37. PubMed ID: 26101040.
    Abstract:
    Diffusive gradients in thin films (DGT) technique was used to determine pore water profile and to assess remobilization character of metals at sediment/water interface. The remobilization of Mn was due to redox reaction in profile, which engendered two large peaks: one with DGT concentration of 1355 µg L(-1) at depth of -4.75 cm in sediment and the other with DGT concentration of 1040 µg L(-1) at depth of -3.25 cm in sediment pore water. Fe reduction zone had a large peak of Fe (3209 µg L(-1)) at depth of -4.75 cm in sediment. Fe DGT-profile also indicated the little peaks and low values of dissolved Fe concentration in Fe-reduction/S-reduction boundary zone in sediment. Detailed correspondence of trace metals with Fe or Mn features in DGT-profiles suggested that their release is related to the reductive dissolution of Fe- or Mn-oxide.
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