Method for dissolution and stabilization of silica-rich fibers
Abstract
A method is described for dissolving silica-rich fibers such as borosilicate fibers, fiberglass and asbestos to stabilize them for disposal. The method comprises (1) immersing the fibers in hot, five-weight-percent sodium hydroxide solution until the concentration of dissolved silica reaches equilibrium and a only a residue is left (about 48 hours), then immersing the residue in hot, five-weight-percent nitric acid until the residue dissolves (about 96 hours). After adjusting the pH of the dissolved fibers to be caustic, the solution can then be added to a waste vitrification stream for safe disposal. The method is useful in disposing contaminated HEME and HEPA filters. 1 fig.
- Inventors:
- Issue Date:
- Research Org.:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 563665
- Patent Number(s):
- 5686365
- Application Number:
- PAN: 7-821,653; TRN: 98:002121
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 11 Nov 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 05 NUCLEAR FUELS; BOROSILICATE GLASS; FIBERGLASS; ASBESTOS; DISSOLUTION; AIR FILTERS; SODIUM HYDROXIDES; NITRIC ACID; VITRIFICATION; HEME; RADIOACTIVE WASTE PROCESSING
Citation Formats
Jantzen, C M. Method for dissolution and stabilization of silica-rich fibers. United States: N. p., 1997.
Web.
Jantzen, C M. Method for dissolution and stabilization of silica-rich fibers. United States.
Jantzen, C M. Tue .
"Method for dissolution and stabilization of silica-rich fibers". United States.
@article{osti_563665,
title = {Method for dissolution and stabilization of silica-rich fibers},
author = {Jantzen, C M},
abstractNote = {A method is described for dissolving silica-rich fibers such as borosilicate fibers, fiberglass and asbestos to stabilize them for disposal. The method comprises (1) immersing the fibers in hot, five-weight-percent sodium hydroxide solution until the concentration of dissolved silica reaches equilibrium and a only a residue is left (about 48 hours), then immersing the residue in hot, five-weight-percent nitric acid until the residue dissolves (about 96 hours). After adjusting the pH of the dissolved fibers to be caustic, the solution can then be added to a waste vitrification stream for safe disposal. The method is useful in disposing contaminated HEME and HEPA filters. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {11}
}
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