Centrifugal enrichment of mercury isotopes

Babaev, N. S.; Chel’tsov, A. N.; Sazykin, A.A.; Sosnin, L. Yu.; Kuchelev, A.P.

doi:10.1016/j.nima.2009.10.006

Cited by 3 publications

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“…The use of Hg that is enriched in one of its stable isotopes is an emerging tool that is providing new insights into the fate of Hg in aquatic ecosystems. , Enrichment is achieved through a variety of atomic engineering methods, including photochemical, electromagnetic, and centrifugal separation . Isotope enriched Hg behaves like ambient Hg, but can be distinguished analytically from indigenous (ambient) Hg .…”

Section: Introductionmentioning

confidence: 99%

“…21,22 Enrichment is achieved through a variety of atomic engineering methods, including photochemical, electromagnetic, and centrifugal separation. 23 Isotope enriched Hg behaves like ambient Hg, but can be distinguished analytically from indigenous (ambient) Hg. 24 As such, it is possible to apply isotope enriched Hg to an ecosystem and subsequently track its fate.…”

Section: ' Introductionmentioning

confidence: 99%

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Dietary and Waterborne Mercury Accumulation by Yellow Perch: A Field Experiment

Hrenchuk

Blanchfield

Paterson

et al. 2011

Environ. Sci. Technol.

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It is well accepted that the majority of monomethylmercury (MMHg) in fish originates in their food; however, the additional contribution of water as a source to fish MMHg levels remains unclear. We used isotope enriched mercury (Hg) in a controlled field experiment to quantify the uptake of Hg from ingested and aqueous sources by young-of-year yellow perch (Perca flavescens). Water and zooplankton from a lake that had received (202)Hg-enriched additions (called spike Hg) for 7 y during a whole-ecosystem loading study (METAALICUS) provided natural, low-level Hg exposure. We achieved separation of exposure pathways by housing perch in one of four treatments: clean water + clean food; clean water + Hg spiked food; Hg spiked water + clean food; Hg spiked water + Hg spiked food. Fish accumulated MMHg directly from water, and this source accounted for at least 10% of MMHg in fish during the 27-d trial. Accumulation of spike Hg from water and food was additive, with food providing the majority of spike MMHg taken in by fish. Predictions from a bioenergetics model that excludes water as a source underestimated Hg in perch by 11%. This study illustrates the importance of acknowledging both food and water as sources of Hg to fish and suggests that aqueous Hg should be included as a source of contamination in bioaccumulation models and experiments.

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