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Boron and strontium isotopic characterization of coal combustion residuals: validation of new environmental tracers.

dc.contributor.author Dwyer, Gary
dc.contributor.author Hower, JC
dc.contributor.author Hsu-Kim, Heileen
dc.contributor.author Ruhl, Laura S
dc.contributor.author Vengosh, Avner
dc.coverage.spatial United States
dc.date.accessioned 2015-01-05T00:28:06Z
dc.date.issued 2014-12-16
dc.identifier http://www.ncbi.nlm.nih.gov/pubmed/25417938
dc.identifier.uri https://hdl.handle.net/10161/9347
dc.description.abstract In the U.S., coal fired power plants produce over 136 million tons of coal combustion residuals (CCRs) annually. CCRs are enriched in toxic elements, and their leachates can have significant impacts on water quality. Here we report the boron and strontium isotopic ratios of leaching experiments on CCRs from a variety of coal sources (Appalachian, Illinois, and Powder River Basins). CCR leachates had a mostly negative δ(11)B, ranging from -17.6 to +6.3‰, and (87)Sr/(86)Sr ranging from 0.70975 to 0.71251. Additionally, we utilized these isotopic ratios for tracing CCR contaminants in different environments: (1) the 2008 Tennessee Valley Authority (TVA) coal ash spill affected waters; (2) CCR effluents from power plants in Tennessee and North Carolina; (3) lakes and rivers affected by CCR effluents in North Carolina; and (4) porewater extracted from sediments in lakes affected by CCRs. The boron isotopes measured in these environments had a distinctive negative δ(11)B signature relative to background waters. In contrast (87)Sr/(86)Sr ratios in CCRs were not always exclusively different from background, limiting their use as a CCR tracer. This investigation demonstrates the validity of the combined geochemical and isotopic approach as a unique and practical identification method for delineating and evaluating the environmental impact of CCRs.
dc.language eng
dc.relation.ispartof Environ Sci Technol
dc.relation.isversionof 10.1021/es503746v
dc.subject Appalachian Region
dc.subject Boron
dc.subject Coal
dc.subject Coal Ash
dc.subject Environmental Monitoring
dc.subject Environmental Pollutants
dc.subject Illinois
dc.subject Isotopes
dc.subject Power Plants
dc.subject Rivers
dc.subject Strontium Isotopes
dc.title Boron and strontium isotopic characterization of coal combustion residuals: validation of new environmental tracers.
dc.type Journal article
pubs.author-url http://www.ncbi.nlm.nih.gov/pubmed/25417938
pubs.begin-page 14790
pubs.end-page 14798
pubs.issue 24
pubs.organisational-group Civil and Environmental Engineering
pubs.organisational-group Duke
pubs.organisational-group Earth and Ocean Sciences
pubs.organisational-group Environmental Sciences and Policy
pubs.organisational-group Global Health Institute
pubs.organisational-group Institutes and Provost's Academic Units
pubs.organisational-group Nicholas School of the Environment
pubs.organisational-group Pratt School of Engineering
pubs.organisational-group University Institutes and Centers
pubs.publication-status Published
pubs.volume 48
dc.identifier.eissn 1520-5851


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