Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium

Abstract 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...

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Autores principales:	Yurina Sekine, Ryuhei Motokawa, Naofumi Kozai, Toshihiko Ohnuki, Daiju Matsumura, Takuya Tsuji, Riku Kawasaki, Kazunari Akiyoshi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8e000784b4b544b6833d6afa773288c2
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spelling	oai:doaj.org-article:8e000784b4b544b6833d6afa773288c22021-12-02T11:40:14ZCalcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium10.1038/s41598-017-02269-z2045-2322https://doaj.org/article/8e000784b4b544b6833d6afa773288c22017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02269-zhttps://doaj.org/toc/2045-2322Abstract 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.Yurina SekineRyuhei MotokawaNaofumi KozaiToshihiko OhnukiDaiju MatsumuraTakuya TsujiRiku KawasakiKazunari AkiyoshiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yurina Sekine Ryuhei Motokawa Naofumi Kozai Toshihiko Ohnuki Daiju Matsumura Takuya Tsuji Riku Kawasaki Kazunari Akiyoshi Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium
description	Abstract 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.
format	article
author	Yurina Sekine Ryuhei Motokawa Naofumi Kozai Toshihiko Ohnuki Daiju Matsumura Takuya Tsuji Riku Kawasaki Kazunari Akiyoshi
author_facet	Yurina Sekine Ryuhei Motokawa Naofumi Kozai Toshihiko Ohnuki Daiju Matsumura Takuya Tsuji Riku Kawasaki Kazunari Akiyoshi
author_sort	Yurina Sekine
title	Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium
title_short	Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium
title_full	Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium
title_fullStr	Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium
title_full_unstemmed	Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium
title_sort	calcium-deficient hydroxyapatite as a potential sorbent for strontium
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8e000784b4b544b6833d6afa773288c2
work_keys_str_mv	AT yurinasekine calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT ryuheimotokawa calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT naofumikozai calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT toshihikoohnuki calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT daijumatsumura calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT takuyatsuji calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT rikukawasaki calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium AT kazunariakiyoshi calciumdeficienthydroxyapatiteasapotentialsorbentforstrontium
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Calcium-deficient Hydroxyapatite as a Potential Sorbent for Strontium

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