Environmental toxicity and radioactivity assessment of a titanium-processing residue with potential for environmental use

Wendling, Laura A., Binet, Monique T., Yuan, Zheng, Gissi, Francesca, Koppel, Darren J. and Adams, Merrin S. (2013) Environmental toxicity and radioactivity assessment of a titanium-processing residue with potential for environmental use. Environmental Toxicology and Chemistry, 32 7: 1443-1452. doi:10.1002/etc.2194


Author Wendling, Laura A.
Binet, Monique T.
Yuan, Zheng
Gissi, Francesca
Koppel, Darren J.
Adams, Merrin S.
Title Environmental toxicity and radioactivity assessment of a titanium-processing residue with potential for environmental use
Journal name Environmental Toxicology and Chemistry   Check publisher's open access policy
ISSN 0730-7268
1552-8618
Publication date 2013-07-01
Sub-type Article (original research)
DOI 10.1002/etc.2194
Volume 32
Issue 7
Start page 1443
End page 1452
Total pages 10
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Collection year 2014
Language eng
Formatted abstract
Thorough examination of the physicochemical characteristics of a Ti-processing residue was undertaken, including mineralogical, geochemical, and radiochemical characterization, and an investigation of the environmental toxicity of soft-water leachate generated from the residue. Concentrations of most metals measured in the leachate were low; thus, the residue is unlikely to leach high levels of potentially toxic elements on exposure to low–ionic strength natural waters. Relative to stringent ecosystem health-based guidelines, only chromium concentrations in the leachate exceeded guideline concentrations for 95% species protection; however, sulfate was present at concentrations known to cause toxicity. It is likely that the high concentration of calcium and extreme water hardness of the leachate reduced the bioavailability of some elements. Geochemical modeling of the leachate indicated that calcium and sulfate concentrations were largely controlled by gypsum mineral dissolution. The leachate was not toxic to the microalga Chlorella sp., the cladoceran Ceriodaphnia dubia, or the estuarine bacterium Vibrio fischeri. The Ti-processing residue exhibited an absorbed dose rate of 186 nGy/h, equivalent to an annual dose of 1.63 mGy and an annual effective dose of 0.326 mGy. In summary, the results indicate that the Ti-processing residue examined is suitable for productive use as an environmental amendment following 10 to 100 times dilution to ameliorate potential toxic effects due to chromium or sulfate.
Keyword Leachate
Ilmenite by-product
Productive use
Ilmenite
Byproduct
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Agriculture and Food Sciences
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 1 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sat, 01 Feb 2014, 01:42:25 EST by Laura Wendling on behalf of School of Agriculture and Food Sciences