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Issue 12, 1990
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Synthetic carbonate apatites as inorganic cation exchangers. Exchange characteristics for toxic ions

Abstract

The ion-exchange characteristics between Ca2+ ions in carbonate apatites containing 6 and 16 wt % CO2–3 ions and toxic ions (Zn2+, Cd2+, Hg2+, and Pb2+) in aqueous solution have been investigated in detail at 25 °C. From the results, it was found that the ion-exchange removal characteristics for Zn2+, Cd2+ and Pb2+ ions were enhanced with increasing CO2–3 ion content; however, those for Hg2+ ions were similar for different CO2–3 content. The reaction with Pb2+ ions was especially remarkable and formed Pb2+ ion-exchanged carbonate apatites. The effect of substitution of CO2–3 for PO3–4 ions was concluded to be a loosening effect on the skeletal structure of the apatite.

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Article information


J. Chem. Soc., Faraday Trans., 1990,86, 2303-2306
Article type
Paper

Synthetic carbonate apatites as inorganic cation exchangers. Exchange characteristics for toxic ions

M. Miyake, K. Watanabe, Y. Nagayama, H. Nagasawa and T. Suzuki, J. Chem. Soc., Faraday Trans., 1990, 86, 2303
DOI: 10.1039/FT9908602303

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