Sources of Mercury Exposure for US Seafood Consumers: Implications for Policy
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Selin_Sources Of.pdf
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Author(s)
Sunderland, Elsie M.
Knightes, Christopher D.
Mason, Robert P.
Selin, Noelle Eckley
Date Issued
September 2009
Journal
Environmental Health Perspectives
Publisher
Environmental Health Perspectives
Citation
Selin, Noelle E. et al. “Sources of Mercury Exposure for U.S. Seafood Consumers:
Implications for Policy.” Environmental Health Perspectives (2009): Web. 3 May 2012. © 2009 Environmental Health Perspectives
Version
Final published version
Abstract
Background: Recent policies attempting to reduce adverse effects of methylmercury exposure from fish consumption in the United States have targeted reductions in anthropogenic emissions from U.S. sources.
Objectives: To analyze the prospects for future North American and international emissions controls, we assessed the potential contributions of anthropogenic, historical, and natural mercury to exposure trajectories in the U.S. population over a 40-year time horizon.
Methods: We used models that simulate global atmospheric chemistry (GEOS-Chem); the fate, transport, and bioaccumulation of mercury in four types of freshwater ecosystems; and mercury cycling among different ocean basins. We considered effects on mercury exposures in the U.S. population based on dietary survey information and consumption data from the sale of commercial market fish.
Results: Although North American emissions controls may reduce mercury exposure by up to 50% for certain highly exposed groups such as indigenous peoples in the Northeast, the potential effects of emissions controls on populations consuming marine fish from the commercial market are less certain because of limited measurements.
Conclusions: Despite uncertainties in the exposure pathway, results indicate that a combination of North American and international emissions controls with adaptation strategies is necessary to manage methylmercury risks across various demographic groups in the United States.
Description
Supplemental Material is available online (doi:10.1289/ehp.0900811.S1 via http://dx.doi.org/).
MIT Department
Massachusetts Institute of Technology. Engineering Systems Division
Massachusetts Institute of Technology. Joint Program on the Science & Policy of Global Change
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1289/ehp.0900811
