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Speciation and Cycling of Mercury in Lavaca Bay, Texas, Sediments

Bloom, Nicolas S, Gill, Gary A., Cappellino, Steven, Dobbs, Charles, McShea, Larry, Driscoll, Charles, Mason, Robert, Rudd, John·1999·Environmental Science & Technology

Abstract

Sediment depth profiles of total mercury (THg) and monomethylmercury (MMHg) were collected at 15 sites in an anthropogenically contaminated estuarine system (Lavaca Bay, TX). THg in the solid phase increased with depth to a maximum located at 10−30 cm, which corresponds to historic industrial discharges to the bay. MMHg in the solid phase was highest in the upper 0−3 cm of the cores, decreasing rapidly with depth. The MMHg content of the surface sediment was a narrowly constrained fraction of the total (0.65 ± 0.34%) over a range of sediment types, while making up only 0.01−0.05% of THg at depth. Porewater concentrations exhibited trends similar to but more exaggerated than in the solid phase. The distribution coefficients (log K d ) for inorganic Hg (IHg = THg − MMHg) were similar in most samples, averaging 4.89 ± 0.43. The log K d for MMHg averaged 2.70 ± 0.78 over all sites and depths but exhibited a subsurface minimum of 2.29 ± 0.67 at the point of maximum dissolved Fe. A time series showed a maximum in both solid phase and porewater MMHg during the early spring, followed by a decrease throughout the remainder of the year.

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Crossref · 10.1021/es980379d

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Cites

Research works printed but not linked: 18

  1. Gill G. A., 1985, Deep Sea Res., 32, 297
  2. Bloom N. S., 1989, Can. J. Fish. Aquat. Sci., 46, 1140, 10.1139/f89-147 · DOI · Paper page
  3. Horvat M., 1993, Anal. Chim. Acta, 282, 162, 10.1016/0003-2670(93)80364-Q · DOI · Paper page
  4. Liang L., 1994, Talanta, 41, 379, 10.1016/0039-9140(94)80141-X · DOI · Paper page
  5. Bloom N. S., 1997, Fresenius J., Anal. Chem., 358, 377, 10.1007/s002160050432 · doi:10.1007/s002160050432
  6. Hurley, J. P.; Krabbenhoft, D. P.; Babiarz, C. L.; Andren, A. W.Environmental Chemistry of Lakes and Reservoirs; Baker, L. A., Ed.; American Chemical Society: Washington, DC, 1994; pp 425−448. · doi:10.1021/ba-1994-0237.ch013
  7. Bloom N. S., 1990, Water Air Soil Pollut., 53, 251
  8. Van Capellen, P.; Wang, Y.Metal Contaminated Aquatic Sediments; Allen, H. E., Ed.; Ann Arbor Press: Chelsea, MI, 1995; pp 22−64.
  9. Thamdrup B., 1994, Geochim. Cosmichim. Acta, 58, 5129
  10. Hines M. E., 1985, Estuarine Coastal Shelf Sci., 29, 742
  11. Bothner M. H., 1973, University of Washington
  12. Bothner M. H., 1980, Geochim. Cosmichim. Acta, 44, 285, 10.1016/0016-7037(80)90137-4 · DOI
  13. Gagnon C., 1996, Limnol Oceanogr., 41, 434, 10.4319/lo.1996.41.3.0428 · DOI
  14. Mason R. P., Technol
  15. Bloom N. S., 1983, Mar. Chem., 14, 59, 10.1016/0304-4203(83)90069-5 · DOI · Paper page
  16. Paquette K., 1995, Water Air Soil Pollut., 80, 1056, 10.1007/BF01189765 · doi:10.1007/bf01189765
  17. Revis N. W., 1989, Analyst, 114, 825, 10.1039/an9891400823 · doi:10.1039/an9891400823
  18. Bartlett P. D., 1981, J. Water Res., 15, 47, 10.1016/0043-1354(81)90180-9 · doi:10.1016/0043-1354(81)90180-9

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Metadata

Authors
Bloom, N. S., Gill, G. A., Cappellino, S., Dobbs, C., McShea, L., Driscoll, C., Mason, R., & Rudd, J.
Venue
Environmental Science & Technology
Published
1998-11-12
Volume
33
Issue
1
Pages
7-13
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2018550290
Cited by
272
References
1
FWCI
10.61
Type
journal article
Language
en
Open access
closed

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