Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
1597307
Reference Type
Journal Article
Title
Characterization of metals released from coal fly ash during dredging at the Kingston ash recovery project
Author(s)
Bednar, AJ; Averett, DE; Seiter, JM; Lafferty, B; Jones, WT; Hayes, CA; Chappell, MA; Clarke, JU; Steevens, JA
Year
2013
Is Peer Reviewed?
Yes
Journal
Chemosphere
ISSN:
0045-6535
EISSN:
1879-1298
Volume
92
Issue
11
Page Numbers
1563-1570
Language
English
PMID
23706374
DOI
10.1016/j.chemosphere.2013.04.034
Web of Science Id
WOS:000323297800023
Abstract
A storage-pond dike failure occurred on December 22, 2008 at the Tennessee Valley Authority Kingston Fossil Plant resulting in the release of over 4million cubic meters (5 million cubic yards) of fly ash. Approximately half of the released ash was deposited in the main channel of the Emory River, Tennessee, USA. Remediation efforts of the Emory River focused on hydraulic dredging, as well as mechanical excavation in targeted areas. However, agitation of the submerged fly ash during hydraulic dredging introduces river water into the fly ash material, which could promote dissolution and desorption of metals from the solid fly ash material. Furthermore, aeration of the dredge slurry could alter the redox state of metals in the fly ash material and thereby change their sorption, mobility, and toxicity properties. The research presented here focuses on the concentrations and speciation of metals during the fly ash recovery from the Emory River. Our results indicate that arsenite [As(III)] released from the fly ash material during dredging was slowly oxidized to arsenate [As(V)] in the slurry recovery system with subsequent removal through precipitation or sorption reactions with suspended fly ash material. Concentrations of other dissolved metals, including iron and manganese, also generally decreased in the ash recovery system prior to water discharge back to the river.
Keywords
Fly ash; Dredging; Speciation; Metal release
Tags
IRIS
•
Arsenic Hazard ID
PubMed
Considered New
ToxNet
Considered New
PubMed
ToxNet
Excluded
Toxnet Duplicates
PubMed
WOS
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
2. Lit Search Updates through Oct 2015
PubMed
WOS
ToxNet
Considered
7. Other Studies through Oct 2015
Exposure Assessment
•
Arsenic (Inorganic)
1. Literature
Lit search updates through Oct 2015
3. Hazard ID Screening
Other potentially supporting studies
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity