The first deployment of DGT/DET for assessment of metals in sediment pore water at Songkhla Lake, Thailand.

Siriporn Pradit, Yue Gao, Aekkarak Faiboon, Mansawan S. Pattarathomrong, Willy Baeyens, Martine Leermakers

Research output: Contribution to journalConference paper

Abstract

The techniques of diffusive equilibrium in thin films (DET) and diffusive gradients in thin films
(DGT) were used for the first time in the Outer Section of Songkhla Lake in order to obtain high resolution
profiles of total dissolved and labile trace metals in the sediment porewater. These tools provide useful
information on sediment biogeochemistry and benthic fluxes. DGT measures labile metal species in situ by
immobilizing them on a resin gel after diffusion through a diffusive gel whereas for DET equilibrium is
established between the DET gel and the porewater. The expedition was carried in July, 2011 under the
collaborative research program between the Laboratory of Analytical and Environmental Chemistry, Vrije
Universiteit Brussel and the Marine and Coastal Resources Institute, Prince of Songkla University. Six DET
probes and six DGT probes were deployed at the mouths of the Phawong, Samrong and U-Taphao canals.
Original languageEnglish
Number of pages31
JournalInternational Proceedings of Chemical, Biological & Environmenta
Volume66
Publication statusPublished - 2014
EventIEEA 2014 - Shanghai, China
Duration: 27 Mar 201428 Mar 2014

Keywords

  • DET
  • DGT
  • Songkhla Lake
  • metals
  • sediment porewaters

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