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Shallow Groundwater Mercury Supply in a Coastal Plain Stream

Overview of attention for article published in Environmental Science & Technology, July 2012
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Title
Shallow Groundwater Mercury Supply in a Coastal Plain Stream
Published in
Environmental Science & Technology, July 2012
DOI 10.1021/es301540g
Pubmed ID
Authors

Paul M. Bradley, Celeste A. Journey, Mark A. Lowery, Mark E. Brigham, Douglas A. Burns, Daniel T. Button, Francis H. Chapelle, Michelle A. Lutz, Mark C. Marvin-DiPasquale, Karen Riva-Murray

Abstract

Fluvial methylmercury (MeHg) is attributed to methylation in up-gradient wetland areas. This hypothesis depends on efficient wetland-to-stream hydraulic transport under nonflood and flood conditions. Fluxes of water and dissolved (filtered) mercury (Hg) species (FMeHg and total Hg (FTHg)) were quantified in April and July of 2009 in a reach at McTier Creek, South Carolina to determine the relative importance of tributary surface water and shallow groundwater Hg transport from wetland/floodplain areas to the stream under nonflood conditions. The reach represented less than 6% of upstream main-channel distance and 2% of upstream basin area. Surface-water discharge increased within the reach by approximately 10%. Mean FMeHg and FTHg fluxes increased within the reach by 23-27% and 9-15%, respectively. Mass balances indicated that, under nonflood conditions, the primary supply of water, FMeHg, and FTHg within the reach (excluding upstream surface water influx) was groundwater discharge, rather than tributary transport from wetlands, in-stream MeHg production, or atmospheric Hg deposition. These results illustrate the importance of riparian wetland/floodplain areas as sources of fluvial MeHg and of groundwater Hg transport as a fundamental control on Hg supply to Coastal Plain streams.

Mendeley readers

The data shown below were compiled from readership statistics for 24 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Iran, Islamic Republic of 1 4%
United States 1 4%
Unknown 22 92%

Demographic breakdown

Readers by professional status Count As %
Researcher 11 46%
Student > Ph. D. Student 3 13%
Professor > Associate Professor 2 8%
Professor 2 8%
Student > Master 2 8%
Other 2 8%
Unknown 2 8%
Readers by discipline Count As %
Environmental Science 7 29%
Earth and Planetary Sciences 5 21%
Agricultural and Biological Sciences 4 17%
Immunology and Microbiology 1 4%
Biochemistry, Genetics and Molecular Biology 1 4%
Other 2 8%
Unknown 4 17%