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The isotopic composition of species-specific atmospheric mercury (Hg) was investigated in the coastal environment of Grand Bay, Mississippi, USA. Hg0(g), HgII(g) and Hg(p) were concurrently separated and collected, and subsequently analyzed for isotopic composition. Hg0(g) displayed negative mass dependent fractionation (MDF) with a range > 3.5 / (δ202Hg = -3.88 / to -0.33 /). Hg(p) displayed intermediate MDF (δ202Hg = -1.61 / to -0.12 /), while HgII(g) displayed positive MDF (δ202Hg = +0.51 / to +1.61 /). Significant positive mass independent fractionation was observed in Hg(p) (∆199Hg = +0.36 / to +1.36 /), while Hg0(g) displayed negative MIF (∆199Hg = -0.41 / to -0.03 /) and HgII(g) displayed intermediate MIF (∆199Hg = -0.28 / to 0.18 /). Positive MIF of 199Hg and 201Hg measured in Hg(p) points to significant in-aerosol photoreduction. Significant MIF of 200Hg was observed in all Hg species with Hg0(g) displaying negative ∆200Hg values of -0.19 / to -0.06 / and Hg(p) and HgII(g) displaying positive ∆200Hg values of +0.06 / to +0.28 /.
atmospheric mercury, Grand Bay, Mississippi, isotope fractionation, MC-ICPMS, reactive gaseous mercury (RGM)
Date of Defense
March 23, 2012.
A Thesis submitted to the College of Music in partial fulfillment of the requirements for the degree of Master of Music.
Includes bibliographical references.
Mark Wingate, Professor Directing Thesis; Ladislav Kubik, Committee Member; Clifton Callender, Committee Member.
Florida State University
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