Identification of multiple mercury sources to stream sediments near Oak Ridge, TN, USA
Abstract
In this paper, sediments were analyzed for total Hg concentration (THg) and isotopic composition from streams and rivers in the vicinity of the Y-12 National Security Complex (Y12) in Oak Ridge, TN (USA). In the stream directly draining Y12, where industrial releases of mercury (Hg) have been documented, high THg (3.26 to 60.1 μg/g) sediments had a distinct Hg isotopic composition (δ202Hg of 0.02 ± 0.15‰ and Δ199Hg of -0.07 ± 0.03‰; mean ± 1SD, n=12) compared to sediments from relatively uncontaminated streams in the region (δ202Hg = -1.40 ± 0.06‰ and Δ199Hg of –0.26 ± 0.03‰; mean ± 1SD, n=6). Additionally, several streams that are nearby but do not drain Y12 had sediments with intermediate THg (0.06 to 0.21 μg/g) and anomalous δ202Hg (as low as -5.07‰). We suggest that the low δ202Hg values in these sediments provide evidence for the contribution of an additional Hg source to sediments, possibly derived from atmospheric deposition. In sediments directly downstream of Y12 this third Hg source is not discernible and the Hg isotopic composition can be largely explained by the mixing of low THg sediments with high THg sediments contaminated by Y12 discharges.
- Authors:
-
- Univ. of Michigan, Ann Arbor, MI (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Tennessee Department of Environment and Conservation, Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1239629
- Grant/Contract Number:
- SC0007042
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Environmental Science and Technology
- Additional Journal Information:
- Journal Volume: 48; Journal Issue: 7; Journal ID: ISSN 0013-936X
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; mercury isotopes; river sediments; East Fork Poplar Creek; Clinch River
Citation Formats
Donovan, Patrick M., Blum, Joel D., Demers, Jason D., Gu, Baohua, Brooks, Scott C., and Peryam, John. Identification of multiple mercury sources to stream sediments near Oak Ridge, TN, USA. United States: N. p., 2014.
Web. doi:10.1021/es4046549.
Donovan, Patrick M., Blum, Joel D., Demers, Jason D., Gu, Baohua, Brooks, Scott C., & Peryam, John. Identification of multiple mercury sources to stream sediments near Oak Ridge, TN, USA. United States. https://doi.org/10.1021/es4046549
Donovan, Patrick M., Blum, Joel D., Demers, Jason D., Gu, Baohua, Brooks, Scott C., and Peryam, John. Mon .
"Identification of multiple mercury sources to stream sediments near Oak Ridge, TN, USA". United States. https://doi.org/10.1021/es4046549. https://www.osti.gov/servlets/purl/1239629.
@article{osti_1239629,
title = {Identification of multiple mercury sources to stream sediments near Oak Ridge, TN, USA},
author = {Donovan, Patrick M. and Blum, Joel D. and Demers, Jason D. and Gu, Baohua and Brooks, Scott C. and Peryam, John},
abstractNote = {In this paper, sediments were analyzed for total Hg concentration (THg) and isotopic composition from streams and rivers in the vicinity of the Y-12 National Security Complex (Y12) in Oak Ridge, TN (USA). In the stream directly draining Y12, where industrial releases of mercury (Hg) have been documented, high THg (3.26 to 60.1 μg/g) sediments had a distinct Hg isotopic composition (δ202Hg of 0.02 ± 0.15‰ and Δ199Hg of -0.07 ± 0.03‰; mean ± 1SD, n=12) compared to sediments from relatively uncontaminated streams in the region (δ202Hg = -1.40 ± 0.06‰ and Δ199Hg of –0.26 ± 0.03‰; mean ± 1SD, n=6). Additionally, several streams that are nearby but do not drain Y12 had sediments with intermediate THg (0.06 to 0.21 μg/g) and anomalous δ202Hg (as low as -5.07‰). We suggest that the low δ202Hg values in these sediments provide evidence for the contribution of an additional Hg source to sediments, possibly derived from atmospheric deposition. In sediments directly downstream of Y12 this third Hg source is not discernible and the Hg isotopic composition can be largely explained by the mixing of low THg sediments with high THg sediments contaminated by Y12 discharges.},
doi = {10.1021/es4046549},
journal = {Environmental Science and Technology},
number = 7,
volume = 48,
place = {United States},
year = {Mon Mar 03 00:00:00 EST 2014},
month = {Mon Mar 03 00:00:00 EST 2014}
}
Web of Science
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Works referencing / citing this record:
Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA
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