Mercury biomagnification in benthic, pelagic, and benthopelagic food webs in an Arctic marine ecosystem

Contrasting trophic transfer patterns of cadmium and mercury in the Arctic marine food web of east Hudson Bay, Canada

“…Thus, it could be the case that some fish and some ringed seal in our study were feeding more on pelagic invertebrates leading to overall higher concentrations of Cd in their tissues. We similarly observed that pelagic feeding was associated with greater Hg concentrations in vertebrate species, which has also been reported for other Arctic marine food webs (Campbell et al 2005 ; Hilgendag et al 2022 ). In the Arctic Ocean, Hg methylation occurs in the water column and the highest seawater methylmercury concentrations occur at subsurface depths where planktonic uptake may be important (Jonsson et al 2022 ; Wang et al 2018 ).…”

“…Trophic magnification slopes have been widely measured to evaluate Hg biomagnification in food webs (Lavoie et al 2013 ). Biomagnification rates of Hg, based on TMS values, can differ by latitude, environment (e.g., marine and fresh water), and even between habitats connected to the same food web (Hilgendag et al 2022 ; Lavoie et al 2013 ). The Hg TMS measured in this study (0.15 ± 0.01) is within the range of other studies of Arctic marine food webs (0.10–0.25) that included seabirds and marine mammals (as summarized in Hilgendag et al ( 2022 )).…”

Sulfur functionalized biocarbon sorbents for low-concentration mercury isolation

“…Table 7 summarizes the isotherm parameters obtained using the Langmuir and Freundlich models. The R 2 values revealed that the adsorption Pseudo-first-order ðq e À q t Þ ¼ q e À k 1 2:303 t eqn (5) Pseudo-second-order t q t ¼ 1 k 2 q e 2 þ t q e eqn ( 6)…”

“…4 Among them, mercury is studied intensely because of its high toxicity due to its bioaccumulation and biomagnification. 5 Mercury is one of the few heavy metals biomagnified along the food chain and can be carried from environmental contamination to human consumption. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Many methods have been utilized to remove heavy metals like mercury from water, including ion exchange, membrane filtration, chemical precipitation, photocatalytic reactions, and adsorption.…”

“…4 Among them, mercury is studied intensely because of its high toxicity due to its bioaccumulation and biomagnification. 5 Mercury is one of the few heavy metals biomagnified along the food chain and can be carried from environmental contamination to human consumption. 6–20…”