Estimating mercury concentrations and fluxes in the water column and sediment of Lake Ontario with HERMES model

Ethier, A.L.M.; Atkinson, Joseph F.; DePinto, Joseph V.; Lean, D. R. S.

doi:10.1016/j.envpol.2011.06.002

Cited by 19 publications

(11 citation statements)

References 35 publications

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“…These results support that sediment is the major reservoir for Hg in aquatic environments. Even though there is no direct discharge into water from Hg-contaminated wastes, Hg in sediment can be transported into water through sediment resuspension and diffusion processes (Bloom et al 2004;Ethier et al 2012;Tong et al 2014).…”

Section: Hg(ii)/mehg In Aquatic Environmentsmentioning

confidence: 99%

Assessing exposure risks for freshwater tilapia species posed by mercury and methylmercury

et al. 2016

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Waterborne and dietborne exposures of freshwater fish to mercury (Hg) in the forms of inorganic (Hg(II)) and organic (methylmercury or MeHg) affect their growth, development, and reproduction. However, an integrated mechanistic risk model framework to predict the impact of Hg(II)/MeHg on freshwater fish is lacking. Here, we integrated biokinetic, physiological and biogeographic data to calibrate and then establish key risk indices-hazardous quotient and exceedance risk-for freshwater tilapia species across geographic ranges of several major rivers in Taiwan. We found that Hg(II) burden was highest in kidney followed by gill, intestine, liver, blood, and muscle. Our results showed that Hg was less likely to pose mortality risk (mortality rate less than 5 %) for freshwater tilapia species. However, Hg is likely to pose the potential hazard to aquatic environments constrained by safety levels for aquatic organisms. Sensitivity analysis showed that amount of Hg accumulated in tilapia was most influenced by sediment uptake rate. Our approach opens up new possibilities for predicting future fish population health with the impacts of continued Hg exposure to provide information on which fish are deemed safe for human consumption.

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Section: Hg(ii)/mehg In Aquatic Environmentsmentioning

confidence: 99%

Assessing exposure risks for freshwater tilapia species posed by mercury and methylmercury

et al. 2016

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“…Still, unlike the latter, it considers three main Hg forms (Hg 0 , MeHg, and residual Hg-mainly consisting of HgII) and dynamic transformations between them. The HERMES model has two segments-a water column and sediment [51].…”

Section: Hg 0 Value Sourcementioning

confidence: 99%

“…Elemental Hg 0 is the "key species" that is used in the non-Hg-specific models (Level I and QWASI) since it is present ubiquitously in the environment, at least in small quantities, and is not readily reactive with many chemicals [51]. In Level I and QWASI models, the distribution into the compartments for only the elemental form of Hg was estimated.…”

Section: Model (Total Mass In Thementioning

confidence: 99%

“…If in-lake concentration gradients at different depths are important, a more advanced model may be recommended. On the contrary, simplified representations can be applied for lakes and screening-level risk assessment where one-dimensional (1D) modeling is sufficient and/or if there is a deficit of information about water and sediment transport in the system [51]. HERMES was compared to more complex mechanistic models (LOTOX2-Hg and simplified STELLA Hg), and the output from HERMES was well-matched with the actual measured values from lake Ontario or LOTOX2-Hg modeled values (r 2 = 0.955; p < 0.0001; n = 10) [51].…”

Section: Fugacity Modelingmentioning

confidence: 99%

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Environmental Partitioning, Spatial Distribution, and Transport of Atmospheric Mercury (Hg) Originating from a Site of Former Chlor-Alkali Plant

et al. 2021

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“…Organic Hg, primarily methyl mercury (MeHg), is the form that bioaccumulates through the foodweb, and so poses the greatest threat to human health (Fitzgerald et al 2007). To improve our understanding of the relationships between sources of mercury and bioaccumulation of MeHg in the foodweb, it is necessary to integrate our current understanding of the processes governing the transport and fate of mercury in the environment (Ethier et al 2012).…”

mentioning

confidence: 99%

Sediment Profile and Fluxes of Mercury and Methyl Mercury in Weihe Watershed in Henan, China

Jiang

Wang

et al. 2015

Bull Environ Contam Toxicol

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Sediment core samples were collected from the Weihe River in February and August 2013. Cores were sectioned and analyzed for total Hg (THg) and methyl mercury (MeHg). THg in sediment cores ranged from 156 to 282 ng g(-1) in February, and from 172 to 300 ng g(-1) in August. MeHg concentrations ranged from 0.80 to 3.11 ng g(-1) in both seasons. Results showed that the diffusive fluxes were up to two orders of magnitude lower than the in situ benthic fluxes. Fluxes of MeHg measured in in situ experiments in August were positively correlated with [Formula: see text] (r = 0.930). THg and MeHg release were not strongly correlated with TOC in February. Patterns of MeHg flux differed greatly depending on oxidation-reduction potential (Eh) (r > 0.70) conditions in the two seasons.

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Estimating mercury concentrations and fluxes in the water column and sediment of Lake Ontario with HERMES model

Cited by 19 publications

References 35 publications

Assessing exposure risks for freshwater tilapia species posed by mercury and methylmercury

Assessing exposure risks for freshwater tilapia species posed by mercury and methylmercury

Environmental Partitioning, Spatial Distribution, and Transport of Atmospheric Mercury (Hg) Originating from a Site of Former Chlor-Alkali Plant

Sediment Profile and Fluxes of Mercury and Methyl Mercury in Weihe Watershed in Henan, China

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