Evaluation of Metals Release from Oxidation of Fly Ash during Dredging of the Emory River, TN
Abstract
This report describes a study examining the effects of Kingston Fossil Plant fly ash on geochemistry, water quality, and aquatic biota relevant to the Emory River in Tennessee. It focuses on the processes specific to the changes in the fly ash chemistry and potential releases as a result of a spill that occurred on December 22, 2008 and the subsequent dredging operations to remove the fly ash from the Emory River. Fly ash from three sites including the original pile, fly ash spilled in the Emory River, and dredged fly ash from the sluice channel were evaluated to assess the potential for metal releases. Fly ash from the Emory River and sluice channel were used to prepare relevant suspensions (e.g., elutriates) to represent extreme conditions for the release, dissolution, and metal speciation changes that might occur during dredging. Advanced chemical assessment techniques were used to quantify the chemical concentrations and speciation in this system. Because multiple metals were present, biological studies were also conducted to assess the potential for toxic effects and uptake in aquatic organisms. Chemistry results from this study were compared to measurements from ongoing monitoring at the site.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2011
- Accession Number
- ADA549336
Entities
People
- Alan James Kennedy
- Anthony J. Bednar
- Daniel E. Averett
- Jacob K. Stanley
- Jeffery A. Steevens
- Jennifer M. Seiter
- Mark A. Chappell
Organizations
- Engineer Research and Development Center