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Preparation of Titanium Hexacyanoferrate Microspheres (Diameter <70 μm) by Water Extraction Variant of Sol-Gel Process and its Application to Sorption of 137Cs from Nuclear Reactor Cooling Water

Published online by Cambridge University Press:  15 February 2011

A. Deptula ,
A. G. Chmielewski ,
W. Lada  and
T. Olczak
A. Deptula
Affiliation:
Institute of Nuclear Chemistry and Technology, ul. Dorodna 16, 03–195 Warsaw, Poland
A. G. Chmielewski
Affiliation:
Institute of Nuclear Chemistry and Technology, ul. Dorodna 16, 03–195 Warsaw, Poland
W. Lada
Affiliation:
Institute of Nuclear Chemistry and Technology, ul. Dorodna 16, 03–195 Warsaw, Poland
T. Olczak
Affiliation:
Institute of Nuclear Chemistry and Technology, ul. Dorodna 16, 03–195 Warsaw, Poland
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Abstract

Titanium hexacyanoferrate microspheres (diameter <70km) were obtained in the following steps: (1) extraction of chlorides from an aqueous solution of TiCl4 with long chain amine -Primene JMT- in paraffin diluent (the resulting sol has the concentration 320 g TiO2/dm3 and the mole ratio Cl-: Ti4+ = 1.83); (2) blending of titania sol with an aqueous solution of K4 Fe(CN)6. 3H2O (280 g/dm3) in order to obtain final sols with Fe(CN)64-: Ti4+ mole ratio of 0.05 - 0.1; (3) formation of multicomponent sol emulsion in 2-ethylhexanol-1 containing I vol. % of Ethomen S/15 (EH), (4) gelation of emulsion drops by extraction of water with partially dehydrated EH; (5) filtration and washing with acetone; (6) drying at 140°C using a special procedure elaborated on the basis of TG and DTA studies.

The final product is insoluble in water and exhibits high sorption efficiency of 137 Cs.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 412: Symposium V – Scientific Basis for Nuclear Waste Management XIX , 1995 , 653
Copyright
Copyright © Materials Research Society 1996

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References

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