論文

査読有り
2017年5月

Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium

SCIENTIFIC REPORTS
  • Yurina Sekine
  • ,
  • Ryuhei Motokawa
  • ,
  • Naofumi Kozai
  • ,
  • Toshihiko Ohnuki
  • ,
  • Daiju Matsumura
  • ,
  • Takuya Tsuji
  • ,
  • Riku Kawasaki
  • ,
  • Kazunari Akiyoshi

7
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41598-017-02269-z
出版者・発行元
NATURE PUBLISHING GROUP

A calcium (Ca)-deficient hydroxyapatite was investigated for its potential to remove Sr2+ from environmentally relevant water. We conducted sorption tests on solutions containing magnesium ion (Mg2+) and calcium ion (Ca2+) as competing cations at a strontium ion (Sr2+) concentration of 0.05 mmol/L. The Ca-deficient hydroxyapatite maintained a high Sr2+ sorption ratio of above 80% in the presence of Mg2+ and Ca2+ at the concentrations between 0.1 and 1.0 mmol/L, whereas the stoichiometric hydroxyapatite showed a lower ratio even in the presence of small amounts of Mg2+ and Ca2+ (72% for Mg2+ and 51% for Ca2+ at 0.1 mmol/L). For solutions with various Sr2+ concentrations between 0.01 and 10 mmol/L, Ca-deficient hydroxyapatite exhibited a higher Sr2+ sorption ratio than stoichiometric hydroxyapatite. The bonding states of Sr2+ on the Ca-deficient hydroxyapatite were evaluated by extended X-ray absorption fine structure measurements. The results indicated that there are specific sorption sites in Ca-deficient hydroxyapatite where Sr2+ is stably and preferentially immobilized.

Web of Science ® 被引用回数 : 14

リンク情報
DOI
https://doi.org/10.1038/s41598-017-02269-z
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000401526200003&DestApp=WOS_CPL

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