Eight years after the coal ash spill – Fate of trace metals in the contaminated river sediments near Kingston, eastern Tennessee
| Autor: | Anthony M. Faiia, Ashley B. Ramsey, Anna Szynkiewicz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
Cadmium business.industry technology industry and agriculture Sediment chemistry.chemical_element respiratory system 010501 environmental sciences 010502 geochemistry & geophysics complex mixtures 01 natural sciences Pollution chemistry Geochemistry and Petrology Retention basin Fly ash Environmental chemistry Environmental Chemistry Environmental science Coal Leaching (metallurgy) Metalloid business Arsenic 0105 earth and related environmental sciences |
| Zdroj: | Applied Geochemistry. 104:158-167 |
| ISSN: | 0883-2927 |
| DOI: | 10.1016/j.apgeochem.2019.03.008 |
| Popis: | In December 2008, the failure of a coal ash retention pond at the Kingston Fossil Plant in eastern Tennessee, United States contaminated the Emory River and Clinch River located upstream of the Watts Bar Reservoir on the Tennessee River. Despite an extensive cleanup effort, further leaching of metals to river water from residual coal ash remains a cause of concern. Also, it is unknown whether coal ash has undergone substantial burial by younger river sediments. In order to address these uncertainties, in spring 2016 we collected six 30 cm long sediment cores from five contaminated and one uncontaminated portions of the river systems. The cores were subdivided into ∼2–3 cm sediment layers, which were exposed to water and acid leaching for metal and metalloid analyses. The measured concentrations of arsenic are 10 times higher in the river sediments near the Kingston Plant compared to downstream locations. Using ratios of various metals (e.g., cadmium, chromium, selenium, vanadium) to arsenic, we have established that only arsenic and selenium in downstream sediments are predominantly sourced by coal ash (80–100%). For other metals (e.g., cadmium, chromium, vanadium) coal ash-derived contamination comprises |
| Databáze: | OpenAIRE |
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