Leaching properties of alkali and alkaline-earth elements immobilized by HZr2(PO4)3

Susumu Nakayama; Hiroko Nakata; Katsuhiko Itoh

doi:10.14853/pcersj.2002F.0.386.0

Preprints of Annual Meeting of The Ceramic Society of Japan
Preprints of Fall Meeting of The Ceramic Society of Japan

15th Fall Meeting of The Ceramic Society of Japan

DOI https://doi.org/10.14853/pcersj.2002F.0.386.0

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Host: The Ceramic Society of Japan

Leaching properties of alkali and alkaline-earth elements immobilized by HZr₂(PO₄)₃

Susumu Nakayama, Hiroko Nakata, Katsuhiko Itoh

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Keywords: Zirconium phosphate, Leaching rate, Thermal treatment, Ionic substitution, Metallic element immobilization, Hydrothermal synthesis

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 386

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Abstract

Mixtures of HZr₂(PO₄)₃ with M^INO₃ (M^I=Li, Na, K, Rb, Cs) or M^II(NO₃)₂ (M^II=Mg, Ca, Sr, Ba) were thermally treated at 973K, in order to investigate the immobilization of M^I or M^II. Leaching tests for M^IZr₂(PO₄)₃ and M^IIZr₄(PO₄)₆ were carried out at 433K for 24 hours in 1mol·dm^-3-HCl. The leaching rate decreased with an increase of ionic radius of M^I or M^II, except for the case of Rb and Cs in M^IZr₂(PO₄)₃.

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