What is it about?
Hydroxyapatite-cobalt(II) ferrocyanide, HAFC, was prepared, characterized and used for the removal of strontium and cesium ions from aqueous solution. Comparative studies on modified and unmodified hydroxyapatite for sorption of both ions were carried out to evaluate the modification process. The sorption process is controlled by an ion exchange mechanism. The modification process of hydroxyapatite enhanced the capacity of cesium ions from 9.26 to 69.49 mg/g, while for strontium ions from 12.84 to 13.44 mg/g, this means that the modification process enhanced the selectivity of cesium ions, and it may be stated that HAFC preferentially takes up Cs+ rather than Sr2+.
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Why is it important?
The surface modification of hydroxyapatite provides novel binding properties for potentially hazardous metals, therefore, this work focused on modification of hydroxyapatite to improve its sorption properties. The modified hydroxyapatite was used for removal of cesium and strontium ions from aqueous solutions. The modification process enhanced the selectivity of cesium ions, and it may be stated that the modified hydroxyapatite preferentially takes up Cs+ rather than Sr2+.
Perspectives
• Hydroxyapatite was prepared and modified for sorption of Cs+ and Sr2+ ions. • The materials were characterized using different analytical techniques. • The modification of hydroxyapatite enhanced the sorption process. • The sorption process is controlled by ion exchange technique. • The modification process enhanced the selectivity of Cs+ ion.
Sayed Metwally
Egyptian Atomic Energy Authority
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This page is a summary of: Modification of hydroxyapatite for removal of cesium and strontium ions from aqueous solution, Journal of Alloys and Compounds, June 2017, Elsevier,
DOI: 10.1016/j.jallcom.2017.03.156.
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