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Removal of Sr2+ using high-surface-area hydroxyapatite synthesized by non-additive in-situ precipitation

Kim, J. and Sambudi, N.S. and Cho, K. (2019) Removal of Sr2+ using high-surface-area hydroxyapatite synthesized by non-additive in-situ precipitation. Journal of Environmental Management, 231 . pp. 788-794.

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Abstract

Owing to their high-risk factor, many attempts have been made to remove radionuclides from water. Sr2+ ions are the target of removal by synthesized hydroxyapatite in this research. A facile method for synthesizing high-surface-area hydroxyapatite by in-situ precipitation using excess diammonium phosphate solution and without any additive was developed. The highest surface area achieved using this method was 177.00 m2/g, and the synthesized hydroxyapatite was also mesoporous. The effects of different pH, temperatures, and ion concentrations during synthesis on the properties of the hydroxyapatite were assessed, and it was found that a low temperature and high pH were optimal for synthesizing high-surface-area hydroxyapatite. The maximum strontium removal capacity of 28.51 mg/g was achieved when the pH-7.5 solution was used. This performance is competitive in comparison with previously developed synthesized materials. Synthesized hydroxyapatite could effectively remove radioactive strontium from an aqueous solution for nuclear waste management. © 2018 Elsevier Ltd

Item Type:Article
Impact Factor:cited By 0
Uncontrolled Keywords:hydroxyapatite; strontium, additive; concentration (composition); ion; low temperature; pH; pollutant removal; precipitable water; precipitation (chemistry); radioactive waste; radionuclide; strontium; temperature effect; waste management, adsorption; Article; calcination temperature; chemical structure; deprotonation; high temperature; hysteresis; low temperature; nuclear waste; pH; pore size; pore size distribution; precipitation; surface area; suspension; synthesis; temperature; titrimetry; X ray diffraction
ID Code:22154
Deposited By: Ahmad Suhairi
Deposited On:28 Feb 2019 05:49
Last Modified:28 Feb 2019 05:49

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