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Response of diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT) trace metal profiles in sediments to phytodetritus mineralisation

Yun Gao UGent, Martine Leermakers, Annelies Pede UGent, Aurelie Magnier, Koen Sabbe UGent, Beatriz Lourino Cabana, Gabriel Billon, Willy Baeyens UGent and David C Gillan (2012) ENVIRONMENTAL CHEMISTRY. 9(1). p.41-47
abstract
Field data from the Belgian Continental Zone showed elevated trace metal concentrations at the sediment-water interface after the occurrence of a phytoplankton bloom. In the present study, laboratory incubation experiments were used to investigate the effect of the phytodetritus remineralisation process on the release of trace metals from contaminated muddy sediments. This remineralisation process was followed by the measurement of chlorophyll-a and dissolved organic carbon levels in the top sediment layers. Two gel techniques, diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT), were used to assess vertical metal profiles in the sediment pore waters and to calculate the metal effluxes. These metal effluxes compared very well with the trace metal concentration variations in the overlying water of the sediment. Much higher effluxes of Mn, Co and As were observed after 2 days of incubation in the microcosms which received additions of phytodetritus. This trend gradually decreased after 7 days of incubation, suggesting that the elevated efflux of trace metals was proportional to the quantity of phytodetritus mineralised at the sediment-water interface. The release of large amounts of toxic elements from the sediments after phytoplankton blooms can therefore potentially affect the marine ecosystem in the Belgian Continental Zone.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
effluxes, incubation experiments, HIGH-RESOLUTION PROFILES, phytoplankton bloom, BELGIAN COASTAL WATERS, NORTH-SEA, PORE WATERS, PHAEOCYSTIS BLOOMS, SOUTHERN BIGHT, NATURAL-WATERS, MARINE, DIATOM, IRON
journal title
ENVIRONMENTAL CHEMISTRY
Environ. Chem.
volume
9
issue
1
pages
41 - 47
Web of Science type
Article
Web of Science id
000300656800007
JCR category
ENVIRONMENTAL SCIENCES
JCR impact factor
2.652 (2012)
JCR rank
58/209 (2012)
JCR quartile
2 (2012)
ISSN
1448-2517
DOI
10.1071/EN11075
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2140627
handle
http://hdl.handle.net/1854/LU-2140627
date created
2012-06-12 13:41:13
date last changed
2012-06-26 09:24:16
@article{2140627,
  abstract     = {Field data from the Belgian Continental Zone showed elevated trace metal concentrations at the sediment-water interface after the occurrence of a phytoplankton bloom. In the present study, laboratory incubation experiments were used to investigate the effect of the phytodetritus remineralisation process on the release of trace metals from contaminated muddy sediments. This remineralisation process was followed by the measurement of chlorophyll-a and dissolved organic carbon levels in the top sediment layers. Two gel techniques, diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT), were used to assess vertical metal profiles in the sediment pore waters and to calculate the metal effluxes. These metal effluxes compared very well with the trace metal concentration variations in the overlying water of the sediment. Much higher effluxes of Mn, Co and As were observed after 2 days of incubation in the microcosms which received additions of phytodetritus. This trend gradually decreased after 7 days of incubation, suggesting that the elevated efflux of trace metals was proportional to the quantity of phytodetritus mineralised at the sediment-water interface. The release of large amounts of toxic elements from the sediments after phytoplankton blooms can therefore potentially affect the marine ecosystem in the Belgian Continental Zone.},
  author       = {Gao, Yun and Leermakers, Martine and Pede, Annelies and Magnier, Aurelie and Sabbe, Koen and Cabana, Beatriz Lourino and Billon, Gabriel and Baeyens, Willy and Gillan, David C},
  issn         = {1448-2517},
  journal      = {ENVIRONMENTAL CHEMISTRY},
  keyword      = {effluxes,incubation experiments,HIGH-RESOLUTION PROFILES,phytoplankton bloom,BELGIAN COASTAL WATERS,NORTH-SEA,PORE WATERS,PHAEOCYSTIS BLOOMS,SOUTHERN BIGHT,NATURAL-WATERS,MARINE,DIATOM,IRON},
  language     = {eng},
  number       = {1},
  pages        = {41--47},
  title        = {Response of diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT) trace metal profiles in sediments to phytodetritus mineralisation},
  url          = {http://dx.doi.org/10.1071/EN11075},
  volume       = {9},
  year         = {2012},
}

Chicago
Gao, Yun, Martine Leermakers, Annelies Pede, Aurelie Magnier, Koen Sabbe, Beatriz Lourino Cabana, Gabriel Billon, Willy Baeyens, and David C Gillan. 2012. “Response of Diffusive Equilibrium in Thin Films (DET) and Diffusive Gradients in Thin Films (DGT) Trace Metal Profiles in Sediments to Phytodetritus Mineralisation.” Environmental Chemistry 9 (1): 41–47.
APA
Gao, Yun, Leermakers, M., Pede, A., Magnier, A., Sabbe, K., Cabana, B. L., Billon, G., et al. (2012). Response of diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT) trace metal profiles in sediments to phytodetritus mineralisation. ENVIRONMENTAL CHEMISTRY, 9(1), 41–47.
Vancouver
1.
Gao Y, Leermakers M, Pede A, Magnier A, Sabbe K, Cabana BL, et al. Response of diffusive equilibrium in thin films (DET) and diffusive gradients in thin films (DGT) trace metal profiles in sediments to phytodetritus mineralisation. ENVIRONMENTAL CHEMISTRY. 2012;9(1):41–7.
MLA
Gao, Yun, Martine Leermakers, Annelies Pede, et al. “Response of Diffusive Equilibrium in Thin Films (DET) and Diffusive Gradients in Thin Films (DGT) Trace Metal Profiles in Sediments to Phytodetritus Mineralisation.” ENVIRONMENTAL CHEMISTRY 9.1 (2012): 41–47. Print.