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Processing of Titanates and Zeolites and use of a Cartridge System for ’Reactor‘ Wastes

Published online by Cambridge University Press:  15 February 2011

S. Forberg ,
T. Westermark ,
K. Svärdströbm  and
L. FÄlth
S. Forberg
Affiliation:
Department of Nuclear Chemistry, The Royal Institute of Technology, S-100 44 Stockholm, Sweden
T. Westermark
Affiliation:
Department of Nuclear Chemistry, The Royal Institute of Technology, S-100 44 Stockholm, Sweden
K. Svärdströbm
Affiliation:
Department of Nuclear Chemistry, The Royal Institute of Technology, S-100 44 Stockholm, Sweden
L. FÄlth
Affiliation:
Department of Nuclear Chemistry, The Royal Institute of Technology, S-100 44 Stockholm, Sweden
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Abstract

New methods were introduced in order to facilitate the production of i) very coarse-grain pure mordenite at a large scale ii) mono-disperse sodium titanate of a low price also at small volumes, and iii) a composite ion exchanger with up to 20 W-% of mordenite in beads of sodium titanate.

Zeolites and titanates were converted to ceramic bodies by hot isostatic pressing at 1 300°C or by cold pressing followed by sintering at temperatures up to 1 300° C. Processed materials were zeolites, titanates and mixtures of them. The mechanical properties of sintered titanates were inferior to the hot pressed ones. Diffraction studies, static leaching at 40°C and Soxhlet leach tests were performed. The leach rates were much higher for mixed materials than for pure ones.

For the handling of inorganic ion exchangers through all processes from packing of inactive beds and immobilization of radioactive species to the sintering or hot pressing for final disposal a system of cartridges is suggested. A lay-out of the system is presented together with some special arguments and some practical experiences. Simple, safe and hygienic operations with an optimal use of the inorganic sorbents are expected to result from this system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 6: Symposium D – Scientific Basis for Nuclear Waste Management IV , 1981 , 481
Copyright
Copyright © Materials Research Society 1982

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References

REFERENCES

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