Ion-exchange properties of strontium hydroxyapatite under acidic conditions

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399808545042· OSTI ID:292997

Sugiyama, Shigeru; Nishioka, Hitoshi; Moriga, Toshihiro; Hayashi, Hiromu ^[1]; Moffat, J B ^[2]

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1. Univ. of Tokushima, Minamijosanjima (Japan). Dept. of Chemical Science and Technology
2. Univ. of Waterloo, Ontario (Canada)

The ion exchange of strontium hydroxyapatite (SrHAp) with Pb{sup 2+} has been investigated under acidic conditions at 293 K. The addition of various acids to the exchanging solution enhanced the exchange capacity in the order HCl > HBr > HF > HNO{sub 3} > no acid, corresponding to the formation of halogen apatites with the former three acids or hydrogen phosphate with HNO{sub 3}. Since the ion-exchange capacity of SrHAp under nonacidic conditions is higher than that of chlorapatite, the aforementioned observations can be attributed to the participation of the protons introduced by the acids.z

• Sponsoring Organization: USDOE
• OSTI ID: 292997
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 13 Vol. 33; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
APATITES
EXPERIMENTAL DATA
ION EXCHANGE
LEAD
SORPTIVE PROPERTIES
STRONTIUM COMPOUNDS