Spatiotemporal characterization of metals in small craft harbour sediments in Nova Scotia, Canada

Hongling Zhang; Tony R. Walker; Emily Davis; Guofeng Ma

doi:10.1016/j.marpolbul.2019.02.004

Spatiotemporal characterization of metals in small craft harbour sediments in Nova Scotia, Canada

Hongling Zhang, Tony R. Walker, Emily Davis, Guofeng Ma

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Abstract

Spatiotemporal (2001–2017) characterization of sediment metal concentrations were assessed in 31 small craft harbours (SCHs) in Nova Scotia, Canada by analyzing secondary data from government sediment assessment reports. Surficial sediment samples (n = 576) were collected prior to routine maintenance or constriction dredging activities. Sediment metal concentration ranges were 0.5–62 (As), 0.05–3.8 (Cd), 1–305 (Cr), 0.5–220 (Cu), 0.003–1.85 (Hg), 0.73–583 (Pb) and 5–2300 (Zn) mg/kg (dw), respectively. Most sediment metal concentrations (>56% of samples) were below low effect level and >96% were below high effect level sediment quality guidelines, suggesting limited ecological impairment to marine biota. Despite wide temporal coverage (16 years), large variation in sediment concentrations across SCHs were likely due to regular dredging activities preventing long-term accumulation of contaminants. Spatial distribution and enrichment factor results revealed that Canso was most impacted by metals, followed by Clarks Harbour.

Original language	English
Pages (from-to)	493-502
Number of pages	10
Journal	Marine Pollution Bulletin
Volume	140
DOIs	https://doi.org/10.1016/j.marpolbul.2019.02.004
Publication status	Published - Mar 2019

Bibliographical note

Funding Information:
Thanks to DFO-SCH and PSPC for supplying sediment data. Funding was provided by NSERC Discovery Grant RGPIN-2018-04119 to T.R.W., China State Scholarship Fund and the School for Resource and Environmental Studies, Dalhousie University.

Funding Information:
Thanks to DFO-SCH and PSPC for supplying sediment data. Funding was provided by NSERC Discovery Grant RGPIN-2018-04119 to T.R.W., China State Scholarship Fund and the School for Resource and Environmental Studies, Dalhousie University .

Publisher Copyright:
© 2019 Elsevier Ltd

ASJC Scopus Subject Areas

Oceanography
Aquatic Science
Pollution

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.marpolbul.2019.02.004

Cite this

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title = "Spatiotemporal characterization of metals in small craft harbour sediments in Nova Scotia, Canada",

abstract = "Spatiotemporal (2001–2017) characterization of sediment metal concentrations were assessed in 31 small craft harbours (SCHs) in Nova Scotia, Canada by analyzing secondary data from government sediment assessment reports. Surficial sediment samples (n = 576) were collected prior to routine maintenance or constriction dredging activities. Sediment metal concentration ranges were 0.5–62 (As), 0.05–3.8 (Cd), 1–305 (Cr), 0.5–220 (Cu), 0.003–1.85 (Hg), 0.73–583 (Pb) and 5–2300 (Zn) mg/kg (dw), respectively. Most sediment metal concentrations (>56% of samples) were below low effect level and >96% were below high effect level sediment quality guidelines, suggesting limited ecological impairment to marine biota. Despite wide temporal coverage (16 years), large variation in sediment concentrations across SCHs were likely due to regular dredging activities preventing long-term accumulation of contaminants. Spatial distribution and enrichment factor results revealed that Canso was most impacted by metals, followed by Clarks Harbour.",

author = "Hongling Zhang and Walker, {Tony R.} and Emily Davis and Guofeng Ma",

note = "Funding Information: Thanks to DFO-SCH and PSPC for supplying sediment data. Funding was provided by NSERC Discovery Grant RGPIN-2018-04119 to T.R.W., China State Scholarship Fund and the School for Resource and Environmental Studies, Dalhousie University. Funding Information: Thanks to DFO-SCH and PSPC for supplying sediment data. Funding was provided by NSERC Discovery Grant RGPIN-2018-04119 to T.R.W., China State Scholarship Fund and the School for Resource and Environmental Studies, Dalhousie University . Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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N2 - Spatiotemporal (2001–2017) characterization of sediment metal concentrations were assessed in 31 small craft harbours (SCHs) in Nova Scotia, Canada by analyzing secondary data from government sediment assessment reports. Surficial sediment samples (n = 576) were collected prior to routine maintenance or constriction dredging activities. Sediment metal concentration ranges were 0.5–62 (As), 0.05–3.8 (Cd), 1–305 (Cr), 0.5–220 (Cu), 0.003–1.85 (Hg), 0.73–583 (Pb) and 5–2300 (Zn) mg/kg (dw), respectively. Most sediment metal concentrations (>56% of samples) were below low effect level and >96% were below high effect level sediment quality guidelines, suggesting limited ecological impairment to marine biota. Despite wide temporal coverage (16 years), large variation in sediment concentrations across SCHs were likely due to regular dredging activities preventing long-term accumulation of contaminants. Spatial distribution and enrichment factor results revealed that Canso was most impacted by metals, followed by Clarks Harbour.

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Spatiotemporal characterization of metals in small craft harbour sediments in Nova Scotia, Canada

Abstract

Bibliographical note

ASJC Scopus Subject Areas

UN SDGs

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