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Atmospheric Mercury Input to the Pensacola Bay Watershed

Title: Atmospheric Mercury Input to the Pensacola Bay Watershed.
Name(s): Cleveland, Sara D., author
Landing, William M., professor directing thesis
Froelich, Philip, committee member
Huettel, Markus, committee member
Department of Earth, Ocean and Atmospheric Sciences, degree granting department
Florida State University, degree granting institution
Type of Resource: text
Genre: Text
Issuance: monographic
Date Issued: 2006
Publisher: Florida State University
Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: By sampling individual rain events over a 1-year period at three sites situated around a known point source of atmospheric mercury, we have attempted to quantify its influence on local mercury deposition. A suite of trace elements was also analyzed on these rain event samples. A multi-element analytical program was set up using a Thermo-Finnigan "Element" ICP-MS. We identified 46 elements that are significantly enriched in rain samples relative to the method blank, including the alkali metals and alkaline earth elements, all three rows of the transition metals, and the rare earth elements. The total mercury concentrations in the rainwater samples ranged from 2-40 ng/L. The volume weighted mean rainfall mercury concentrations ranged from 9.2-9.8 ng/L, and there were no significant differences in the rainfall Hg deposition between the three sites. Principal component factor analysis (PCFA) was used to evaluate co-variance between mercury and trace element deposition. PCFA showed a strong crustal factor, a strong sea-salt factor, a mysterious "P" factor and a strong mercury factor. The mercury factor linked mercury with Bi, Ga, Pb, Sb and V. Plume dispersion modeling and air-mass back trajectory analysis have been conducted for each rain event. The goal of this research was to use mercury and trace element relationships in an effort to identify, and quantify, the impacts from various emission sources in the region on rainfall chemistry. We calculated the annual integrated percent of mercury associated with coal burning ranging between 15-47%. Using models to estimate the impact of local deposition we found that less than 1% of the mercury we measured is from the known point source.
Identifier: FSU_migr_etd-3582 (IID)
Submitted Note: A Thesis submitted to the Department of Oceanography in partial fulfillment of the requirements for the degree of Master of Science.
Degree Awarded: Fall Semester, 2006.
Date of Defense: July 14, 2006.
Keywords: Pensacola, Trace Metal, Florida, Hg, Coal Fired Power Plant
Bibliography Note: Includes bibliographical references.
Advisory Committee: William M. Landing, Professor Directing Thesis; Philip Froelich, Committee Member; Markus Huettel, Committee Member.
Subject(s): Oceanography
Atmospheric sciences
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Host Institution: FSU

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Cleveland, S. D. (2006). Atmospheric Mercury Input to the Pensacola Bay Watershed. Retrieved from