Dissolution studies of CsA1Si/sub 5/O/sub 12/

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Nucl. Chem. Waste Manage.; (United States)

DOI:https://doi.org/10.1016/0191-815X(83)90007-4· OSTI ID:5415798

Vance, E R; Ahmad, F J

CsAlSi/sub 5/O/sub 12/ was exposed to a variety of aqueous media, with most of the experiments being conducted at 70 /sup 0/C. The Cs extraction was approximately proportional to the square root of the dissolution time. As found previously at 25 /sup 0/C the Cs extraction at 70 /sup 0/C varied as (H/sup +/) /SUP 1/4/ in the pH = 1-4 range and increased with increasing alkalinity beyond pH = 7. No substantial change in the Cs dissolution rate at neutral pH was found in 1 ..mu.. CaC1/sub 2/, as against deionized water, a possible slight increase was observed in 0.01 ..mu.. NaHCO/sub 3/ relative to KOH of about the same pH, and a sixfold increase was observed at neutral pH in 1 ..mu.. NaCl relative to deionized water. The dissolution rate increased by a factor of about 10 on heating from 25 to 70-100 /sup 0/C, but not with further increase of temperature. The Cs dissolution rate of Cs-loaded Na mordenite which was rendered X-ray amorphous by subsolidus heating at 1000 /sup 0/C was found to be about 1 g.m/sup -2/.day/sup -1/ in a Soxhlet test.

• Research Organization: Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania
• DOE Contract Number: AC09-79ET41900
• OSTI ID: 5415798
• Journal Information: Nucl. Chem. Waste Manage.; (United States), Journal Name: Nucl. Chem. Waste Manage.; (United States) Vol. 4:Z; ISSN NCWMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AQUEOUS SOLUTIONS
CESIUM COMPOUNDS
CESIUM OXIDES
CHALCOGENIDES
DATA
DISPERSIONS
DISSOLUTION
EXPERIMENTAL DATA
EXTRACTION
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
MATERIALS TESTING
MEDIUM TEMPERATURE
MIXTURES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
SOLVENT EXTRACTION
TEMPERATURE GRADIENTS
TESTING
TIME DEPENDENCE