The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Sulfide Controls on Mercury Speciation and Bioavailability to Methylating Bacteria in Sediment Pore Waters
Abstract
A chemical equilibrium model for Hg complexation in sediments with sulfidic pore waters is presented. The purpose of the model was to explain observed relationships between pore water sulfide, dissolved inorganic Hg (Hg D ), and bulk methylmercury (MeHg) in surficial sediments of two biogeochemically different ecosystems, the Florida Everglades and Patuxent River, MD. The model was constructed to test the hypothesis that the availability of Hg for methylation in sediments is a function of the concentration of neutral dissolved Hg complexes rather than Hg 2+ or total Hg D . The model included interaction of mercury with solids containing one or two sulfide groups, and it was able to reproduce observed Hg D and bulk MeHg trends in the two ecosystems. The model is consistent with HgS 0 as the dominant neutral Hg complex and the form of Hg accumulated by methylating bacteria in sulfidic pore waters. The model-estimated decline in HgS 0 with increasing sulfide was consistent with the observed decline in bulk sediments MeHg. Since bacterial Hg uptake rate is one of the factors affecting methylation rate, Hg complexation models such as the one presented are helpful in understanding the factors that control MeHg production and accumulation in aquatic ecosystems.
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Citations
Cites
Sulfate stimulation of mercury methylation in freshwater sediments
Gilmour, C. C., Henry, E. A., & Mitchell, R. (1992) · Environmental Science & Technology · doi:10.1021/es00035a029 · Cited by 1,124
Self-citation
Cited by
Interactions between mercury and dissolved organic matter––a review
Ravichandran, M. (2004) · Chemosphere · doi:10.1016/j.chemosphere.2003.11.011 · Cited by 1,254
Bacterial mercury resistance from atoms to ecosystems
Barkay, T., Miller, S. M., & Summers, A. O. (2003) · FEMS Microbiology Reviews · doi:10.1016/s0168-6445(03)00046-9 · Cited by 1,054
Selenium and mercury in organisms: Interactions and mechanisms
Yang, D.-Y., Chen, Y.-W., Gunn, J. M., & Belzile, N. (2008) · Environmental Reviews · doi:10.1139/a08-001 · Cited by 304
Geochemistry of Mercury in the Environment
Fitzgerald, W. F., & Lamborg, C. H. (2014) · Treatise on Geochemistry · doi:10.1016/b978-0-08-095975-7.00904-9 · Cited by 275
Hall, B. D., Aiken, G. R., Krabbenhoft, D. P., Marvin-DiPasquale, M., & Swarzenski, C. M. (2008) · Environmental Pollution · doi:10.1016/j.envpol.2007.12.017 · Cited by 207
Metadata
- Authors
- Benoit, J. M., Gilmour, C. C., Mason, R. P., & Heyes, A.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-02-03
- Volume
- 33
- Issue
- 6
- Pages
- 951-957
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2057701918
- Cited by
- 725
- References
- 1
- FWCI
- 14.32
- Type
- journal article
- Language
- en
- Open access
- closed
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