Screening and determination of mobility for mercury in marine sediment

Olga Cavoura, Helen Keenan, Christine Davidson, Nicholas Katsiris

Research output: Contribution to conferencePaper

Abstract

Implementation of a screening method for mercury in the marine environment for the identification of contaminated sediment followed by classification of mobility has been carried out in the Bay of Elefsis, one of the most industrialized areas in the Attica Region of Greece. With releases of mercury being both natural and anthropogenic, and sediment contamination resulting from surface water run off, discharge of industrial effluent, atmospheric deposition and from the aquatic environment itself, the extent of sediment mercury pollution is difficult to assess. Screening involving sample digestion, reduction of inorganic mercury to elemental mercury, and the trapping of elemental mercury on detecting papers with a copper iodide coating, to produce a colour the intensity of which is related to the mercury concentration in the sample has been implemented previously in soil and fresh water sediment [1]. This method was implemented in the marine environment. Marine sediment samples were obtained from the Gulf of Elefsis, both coastal and from the centre of the bay. Industrial discharges in the bay arise mainly from shipyards, steelworks and oil refineries. Coastal sampling points were selected in the region of two shipyards, two in the region of refineries, one from a ship disassembly unit, and one sampling point from an outlet that receives effluent from several industries such as asphalt and paper production. Three samples were also collected from the centre of the bay. Previous determinations of metal concentrations have indicated higher results for coastal regions, consistent with pollution directly as a result of main land industrial activity. Screening results indicate that total mercury concentrations in the majority of the samples exceed 0.1 mg/kg, the method detection limit. There is no agreed international limit value for mercury in sediment. However, subsequent quantification of the mercury concentration in the samples indicated that some exceed the Canadian sediment quality guideline value of 0.13 mg/kg for marine sediment. Determination of the mobility of mercury in the samples was carried out using sequential extraction, identifying mobile, semi mobile and non mobile species concentrations. The mobile fraction was further separated into organic and inorganic forms of mercury using solid phase extraction with sulphydryl cotton fibres [2].

Conference

Conference10th International Conference on Mercury as a Global Pollutant
CountryCanada
CityHalifax
Period24/07/1129/07/11

Fingerprint

marine sediment
sediment
screening
mercury
marine environment
pollution
sampling
iodide
asphalt
detection method
atmospheric deposition
aquatic environment
trapping
cotton
digestion
coating
effluent
copper
surface water
industry

Keywords

  • marine sediment
  • mercury
  • civil engineering

Cite this

Cavoura, O., Keenan, H., Davidson, C., & Katsiris, N. (2011). Screening and determination of mobility for mercury in marine sediment. Paper presented at 10th International Conference on Mercury as a Global Pollutant, Halifax, Canada.
Cavoura, Olga ; Keenan, Helen ; Davidson, Christine ; Katsiris, Nicholas. / Screening and determination of mobility for mercury in marine sediment. Paper presented at 10th International Conference on Mercury as a Global Pollutant, Halifax, Canada.
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abstract = "Implementation of a screening method for mercury in the marine environment for the identification of contaminated sediment followed by classification of mobility has been carried out in the Bay of Elefsis, one of the most industrialized areas in the Attica Region of Greece. With releases of mercury being both natural and anthropogenic, and sediment contamination resulting from surface water run off, discharge of industrial effluent, atmospheric deposition and from the aquatic environment itself, the extent of sediment mercury pollution is difficult to assess. Screening involving sample digestion, reduction of inorganic mercury to elemental mercury, and the trapping of elemental mercury on detecting papers with a copper iodide coating, to produce a colour the intensity of which is related to the mercury concentration in the sample has been implemented previously in soil and fresh water sediment [1]. This method was implemented in the marine environment. Marine sediment samples were obtained from the Gulf of Elefsis, both coastal and from the centre of the bay. Industrial discharges in the bay arise mainly from shipyards, steelworks and oil refineries. Coastal sampling points were selected in the region of two shipyards, two in the region of refineries, one from a ship disassembly unit, and one sampling point from an outlet that receives effluent from several industries such as asphalt and paper production. Three samples were also collected from the centre of the bay. Previous determinations of metal concentrations have indicated higher results for coastal regions, consistent with pollution directly as a result of main land industrial activity. Screening results indicate that total mercury concentrations in the majority of the samples exceed 0.1 mg/kg, the method detection limit. There is no agreed international limit value for mercury in sediment. However, subsequent quantification of the mercury concentration in the samples indicated that some exceed the Canadian sediment quality guideline value of 0.13 mg/kg for marine sediment. Determination of the mobility of mercury in the samples was carried out using sequential extraction, identifying mobile, semi mobile and non mobile species concentrations. The mobile fraction was further separated into organic and inorganic forms of mercury using solid phase extraction with sulphydryl cotton fibres [2].",
keywords = "marine sediment , mercury, civil engineering",
author = "Olga Cavoura and Helen Keenan and Christine Davidson and Nicholas Katsiris",
year = "2011",
month = "7",
day = "28",
language = "English",
note = "10th International Conference on Mercury as a Global Pollutant ; Conference date: 24-07-2011 Through 29-07-2011",

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Cavoura, O, Keenan, H, Davidson, C & Katsiris, N 2011, 'Screening and determination of mobility for mercury in marine sediment' Paper presented at 10th International Conference on Mercury as a Global Pollutant, Halifax, Canada, 24/07/11 - 29/07/11, .

Screening and determination of mobility for mercury in marine sediment. / Cavoura, Olga; Keenan, Helen; Davidson, Christine; Katsiris, Nicholas.

2011. Paper presented at 10th International Conference on Mercury as a Global Pollutant, Halifax, Canada.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Screening and determination of mobility for mercury in marine sediment

AU - Cavoura, Olga

AU - Keenan, Helen

AU - Davidson, Christine

AU - Katsiris, Nicholas

PY - 2011/7/28

Y1 - 2011/7/28

N2 - Implementation of a screening method for mercury in the marine environment for the identification of contaminated sediment followed by classification of mobility has been carried out in the Bay of Elefsis, one of the most industrialized areas in the Attica Region of Greece. With releases of mercury being both natural and anthropogenic, and sediment contamination resulting from surface water run off, discharge of industrial effluent, atmospheric deposition and from the aquatic environment itself, the extent of sediment mercury pollution is difficult to assess. Screening involving sample digestion, reduction of inorganic mercury to elemental mercury, and the trapping of elemental mercury on detecting papers with a copper iodide coating, to produce a colour the intensity of which is related to the mercury concentration in the sample has been implemented previously in soil and fresh water sediment [1]. This method was implemented in the marine environment. Marine sediment samples were obtained from the Gulf of Elefsis, both coastal and from the centre of the bay. Industrial discharges in the bay arise mainly from shipyards, steelworks and oil refineries. Coastal sampling points were selected in the region of two shipyards, two in the region of refineries, one from a ship disassembly unit, and one sampling point from an outlet that receives effluent from several industries such as asphalt and paper production. Three samples were also collected from the centre of the bay. Previous determinations of metal concentrations have indicated higher results for coastal regions, consistent with pollution directly as a result of main land industrial activity. Screening results indicate that total mercury concentrations in the majority of the samples exceed 0.1 mg/kg, the method detection limit. There is no agreed international limit value for mercury in sediment. However, subsequent quantification of the mercury concentration in the samples indicated that some exceed the Canadian sediment quality guideline value of 0.13 mg/kg for marine sediment. Determination of the mobility of mercury in the samples was carried out using sequential extraction, identifying mobile, semi mobile and non mobile species concentrations. The mobile fraction was further separated into organic and inorganic forms of mercury using solid phase extraction with sulphydryl cotton fibres [2].

AB - Implementation of a screening method for mercury in the marine environment for the identification of contaminated sediment followed by classification of mobility has been carried out in the Bay of Elefsis, one of the most industrialized areas in the Attica Region of Greece. With releases of mercury being both natural and anthropogenic, and sediment contamination resulting from surface water run off, discharge of industrial effluent, atmospheric deposition and from the aquatic environment itself, the extent of sediment mercury pollution is difficult to assess. Screening involving sample digestion, reduction of inorganic mercury to elemental mercury, and the trapping of elemental mercury on detecting papers with a copper iodide coating, to produce a colour the intensity of which is related to the mercury concentration in the sample has been implemented previously in soil and fresh water sediment [1]. This method was implemented in the marine environment. Marine sediment samples were obtained from the Gulf of Elefsis, both coastal and from the centre of the bay. Industrial discharges in the bay arise mainly from shipyards, steelworks and oil refineries. Coastal sampling points were selected in the region of two shipyards, two in the region of refineries, one from a ship disassembly unit, and one sampling point from an outlet that receives effluent from several industries such as asphalt and paper production. Three samples were also collected from the centre of the bay. Previous determinations of metal concentrations have indicated higher results for coastal regions, consistent with pollution directly as a result of main land industrial activity. Screening results indicate that total mercury concentrations in the majority of the samples exceed 0.1 mg/kg, the method detection limit. There is no agreed international limit value for mercury in sediment. However, subsequent quantification of the mercury concentration in the samples indicated that some exceed the Canadian sediment quality guideline value of 0.13 mg/kg for marine sediment. Determination of the mobility of mercury in the samples was carried out using sequential extraction, identifying mobile, semi mobile and non mobile species concentrations. The mobile fraction was further separated into organic and inorganic forms of mercury using solid phase extraction with sulphydryl cotton fibres [2].

KW - marine sediment

KW - mercury

KW - civil engineering

UR - http://mercury2011.org/program-s13

M3 - Paper

ER -

Cavoura O, Keenan H, Davidson C, Katsiris N. Screening and determination of mobility for mercury in marine sediment. 2011. Paper presented at 10th International Conference on Mercury as a Global Pollutant, Halifax, Canada.