NDLI: Mercury transport between sediments and the overlying water of the St. Lawrence River area of concern near Cornwall, Ontario.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Delongchamp, Tania M. Ridal, Jeffrey J. Lean, David R. S. Poissant, Laurier Blais, Jules M.
Spatial Coverage	Ontario
Description	Country affiliation: Canada Author Affiliation: Delongchamp TM ( Department of Biology, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario K1N 6N5, Canada. tdelongchamp@intrinsikscience.com)
Abstract	Contaminated sediments in the St. Lawrence River remain a difficult problem despite decreases in emissions. Here, sediment and pore water phases were analyzed for total mercury (THg) and methyl mercury (MeHg) and diffusion from the sediment to the overlying water was 17.5 + or - 10.6 SE ng cm(-2) yr(-1) for THg and 3.8 + or - 1.7 SE ng cm(-2) yr(-1) for MeHg. These fluxes were very small when compared to the particle-bound mercury flux accumulating in the sediment (183 + or - 30 SE ng cm(-2) yr(-1)). Studies have reported that fish from the westernmost site have higher Hg concentrations than fish collected from the other two sites of the Cornwall Area of Concern, which could not be explained by differences in the Hg flux or THg concentrations in sediments, but the highest concentrations of sediment MeHg, and the greatest proportions of MeHg to THg in both sediment and pore water were observed where fish had highest MeHg concentrations.
File Format	HTM / HTML
ISSN	02697491
Issue Number	5
Volume Number	158
e-ISSN	18736424
Journal	Environmental Pollution
Language	English
Publisher	Elsevier
Publisher Date	2010-05-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Discipline Science Environmental Monitoring Geologic Sediments Analysis Mercury Chemistry Methylmercury Compounds Rivers Water Pollutants, Chemical Animals Diffusion Fishes Kinetics Muscles Ontario Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Pollution Medicine Toxicology

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Ebullition rates and mercury concentrations in St. Lawrence river sediments and a benthic invertebrate.

Sediment mercury dynamics and historical trends of mercury deposition in the St. Lawrence River area of concern near Cornwall, Ontario, Canada.

Biogeochemical factors influencing net mercury methylation in contaminated freshwater sediments from the St. Lawrence River in Cornwall, Ontario, Canada.

Steady-state mass balance model for mercury in the St. Lawrence River near Cornwall, Ontario, Canada.

Mercury concentrations at a historically mercury-contaminated site in KwaZulu-Natal (South Africa).

Correlates of mercury in fish from lakes near Clyde Forks, Ontario, Canada.

Mercury and methylmercury concentrations in two newly constructed reservoirs in the Wujiang River, Guizhou, China.

Biogeochemical factors affecting the distribution, speciation, and transport of Hg species in the Deûle and Lys Rivers (Northern France).

Effects of coastal managed retreat on mercury biogeochemistry.

Mercury transport between sediments and the overlying water of the St. Lawrence River area of concern near Cornwall, Ontario.

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Ebullition rates and mercury concentrations in St. Lawrence river sediments and a benthic invertebrate.

Sediment mercury dynamics and historical trends of mercury deposition in the St. Lawrence River area of concern near Cornwall, Ontario, Canada.

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Steady-state mass balance model for mercury in the St. Lawrence River near Cornwall, Ontario, Canada.

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Correlates of mercury in fish from lakes near Clyde Forks, Ontario, Canada.

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Mercury transport between sediments and the overlying water of the St. Lawrence River area of concern near Cornwall, Ontario.