Advanced search
1 file | 312.12 KB

Presence and mobility of arsenic in estuarine wetland soils of the Scheldt estuary (Belgium)

Author
Organization
Abstract
We aimed to assess the presence and availability of arsenic (As) in intertidal marshes of the Scheldt estuary. Arsenic content was determined in soils sampled at 4 sampling depths in 11 marshes, together with other physicochemical characteristics. Subsequently, a greenhouse experiment was set up in which pore water arsenic (As) concentrations were measured 4 times in a 298-day period in 4 marsh soils at different sampling depths (10, 30, 60 and 90 cm) upon adjusting the water table level to 0, 40 and 80 cm below the surface of these soils. The As content in the soil varied significantly with sampling depth and location. Clay and organic matter seem to promote As accumulation in the upper soil layer (0-20 cm below the surface), whereas sulfide precipitation plays a significant role at higher sampling depths (20100 cm below the surface). The As concentrations in the pore water of the greenhouse experiment often significantly exceeded the Flemish soil sanitation thresholds for groundwater. There were indications that As release is not only affected by the reductive dissolution of Fe/Mn oxides, but also by e. g. a direct reduction of As(V) to As(III). Below the water table, sulfide precipitation seems to lower As mobility when reducing conditions have been sufficiently established. Above the water table, sulfates and bicarbonates induce As release from the solid soil phase to the pore water.
Keywords
MOBILIZATION, ADSORPTION, GROUNDWATER, TRACE-METALS, HEAVY-METALS, RIVER SCHELDT, ORGANIC-MATTER, METAL CONCENTRATIONS, DISSIMILATORY REDUCTION, INTERTIDAL SEDIMENTS

Downloads

  • DuLaing 2009 JEM 11 4 873.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 312.12 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Du Laing, Gijs, SK Chapagain, M Dewispelaere, Erik Meers, F Kazama, Filip Tack, J Rinklebe, and Marc Verloo. 2009. “Presence and Mobility of Arsenic in Estuarine Wetland Soils of the Scheldt Estuary (Belgium).” Journal of Environmental Monitoring 11 (4): 873–881.
APA
Du Laing, Gijs, Chapagain, S., Dewispelaere, M., Meers, E., Kazama, F., Tack, F., Rinklebe, J., et al. (2009). Presence and mobility of arsenic in estuarine wetland soils of the Scheldt estuary (Belgium). JOURNAL OF ENVIRONMENTAL MONITORING, 11(4), 873–881.
Vancouver
1.
Du Laing G, Chapagain S, Dewispelaere M, Meers E, Kazama F, Tack F, et al. Presence and mobility of arsenic in estuarine wetland soils of the Scheldt estuary (Belgium). JOURNAL OF ENVIRONMENTAL MONITORING. 2009;11(4):873–81.
MLA
Du Laing, Gijs, SK Chapagain, M Dewispelaere, et al. “Presence and Mobility of Arsenic in Estuarine Wetland Soils of the Scheldt Estuary (Belgium).” JOURNAL OF ENVIRONMENTAL MONITORING 11.4 (2009): 873–881. Print.
@article{853421,
  abstract     = {We aimed to assess the presence and availability of arsenic (As) in intertidal marshes of the Scheldt estuary. Arsenic content was determined in soils sampled at 4 sampling depths in 11 marshes, together with other physicochemical characteristics. Subsequently, a greenhouse experiment was set up in which pore water arsenic (As) concentrations were measured 4 times in a 298-day period in 4 marsh soils at different sampling depths (10, 30, 60 and 90 cm) upon adjusting the water table level to 0, 40 and 80 cm below the surface of these soils. The As content in the soil varied significantly with sampling depth and location. Clay and organic matter seem to promote As accumulation in the upper soil layer (0-20 cm below the surface), whereas sulfide precipitation plays a significant role at higher sampling depths (20100 cm below the surface). The As concentrations in the pore water of the greenhouse experiment often significantly exceeded the Flemish soil sanitation thresholds for groundwater. There were indications that As release is not only affected by the reductive dissolution of Fe/Mn oxides, but also by e. g. a direct reduction of As(V) to As(III). Below the water table, sulfide precipitation seems to lower As mobility when reducing conditions have been sufficiently established. Above the water table, sulfates and bicarbonates induce As release from the solid soil phase to the pore water.},
  author       = {Du Laing, Gijs and Chapagain, SK and Dewispelaere, M and Meers, Erik and Kazama, F and Tack, Filip and Rinklebe, J and Verloo, Marc},
  issn         = {1464-0325},
  journal      = {JOURNAL OF ENVIRONMENTAL MONITORING},
  keyword      = {MOBILIZATION,ADSORPTION,GROUNDWATER,TRACE-METALS,HEAVY-METALS,RIVER SCHELDT,ORGANIC-MATTER,METAL CONCENTRATIONS,DISSIMILATORY REDUCTION,INTERTIDAL SEDIMENTS},
  language     = {eng},
  number       = {4},
  pages        = {873--881},
  title        = {Presence and mobility of arsenic in estuarine wetland soils of the Scheldt estuary (Belgium)},
  url          = {http://dx.doi.org/10.1039/b815875d},
  volume       = {11},
  year         = {2009},
}

Altmetric
View in Altmetric
Web of Science
Times cited: