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Role of organic matter and microbial communities in mercury retention and methylation in sediments near run-of-river hydroelectric dams
(Elsevier, 2021-02-06)
Run-of-river power plants (RoRs) are expected to triple in number over the next decades in Canada. These struc-tures are not anticipated to considerably promote the mobilization and transport of mercury (Hg) and its ...
Mobilization and transformation of mercury across a dammed boreal river are linked to carbon processing and hydrology
(Wiley, 2020-09-22)
Reservoirs are known to accelerate the mobilization and cycling of mercury and carbon as aresult of flooding of terrestrial organic matter, which can lead to environmental concerns at local andbroader spatial scales. We ...
Effects of experimental thermocline and oxycline deepening on methylmercury bioaccumulation in a Canadian Shield lake
(American Chemical Society, 2014-02-10)
Environmental disturbances like deforestation or climate change may influence lake thermal and oxic stratification, thereby modifying cycles of contaminants such as mercury (Hg). In a lake naturally separated into three ...
Toxicity and subcellular fractionation of yttrium in three freshwater organisms : Daphnia magna, Chironomus riparius and Oncorhynchus mykiss
(American Chemical Society, 2019-08-15)
The demand for rare earth elements (REEs) has increased since the 1990s leading to the development of many mining projects worldwide. However, less is known about how organisms can handle these metals in natural aquatic ...
Mapping metal (Hg, As, Se), lipid and protein levels within fish muscular system in two fish species (Striped Bass and Northern Pike)
(Elsevier, 2020-11-19)
Current guidelines tend to limitfish consumption based on mercury (Hg) or monomethylmercury(MeHg) content infishflesh, without considering the presence of antagonist chemical elements thatcould modulate Hg toxicity. However, ...
Understanding food web mercury accumulation through trophic transfer and carbon processing along a river affected by recent run-of-river dams
(2021-02-03)
Unlike large dams which favor methylation of Hg in flooded soils over long periods, run-of-river dams are designed to flood a limited area of soils and are therefore not expected to significantly affect mercury (Hg) cycling ...
Photodemethylation of methylmercury in Eastern Canadian Arctic thaw pond and lake ecosystems
(2016-04-05)
Permafrost thaw ponds of the warming Eastern Canadian Arctic are major landscape constituents and often display high levels of methylmercury (MeHg). We examined photodegradation potentials in high-dissolved organic matter ...
Mercury, hydroquinone and clobetasol propionate in skin lightening products in West Africa and Canada
(2016-10-31)
Skin lightening products are types of cosmetics (creams, gels, lotions and soaps) applied voluntarily on
skin. Several of these products contain a variety of active ingredients that are highly toxic. Among those
toxic ...
Fate and trophic transfer of rare earth elements in temperate lake food webs
(2017-05-05)
Many mining projects targeting rare earth elements (REE) are in development in North America, but the background concentrations and trophic transfer of these elements in natural environments have not been well characterized. ...
Differential effects of plant root systems on nickel, copper and silver bioavailability in contaminated soil
(2017-02-28)
A pot experiment was conducted to investigate the effect of diverse plant species (four herbaceous and four
woody species) on the labile pool of six metals (Ag, Cu, Pd, Zn, Ni and Se) present in their rhizosphere.
After ...