Uptake of Sr2+ and Co2+ into Biogenic Hydroxyapatite: Implications for Biomineral Ion Exchange Synthesis

Biomineral hydroxyapatite (Bio-HAp) produced by Serratia sp. has the potential to be a suitable material for the remediation of metal contaminated waters and as a radionuclide waste storage material. Varying the Bio-HAp manufacturing method was found to influence hydroxyapatite (HAp) properties and...

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Bibliographic Details
Published in:Environmental science & technology 2011-08, Vol.45 (16), p.6985-6990
Main Authors: Handley-Sidhu, S, Renshaw, J. C, Moriyama, S, Stolpe, B, Mennan, C, Bagheriasl, S, Yong, P, Stamboulis, A, Paterson-Beedle, M, Sasaki, K, Pattrick, R. A. D, Lead, J. R, Macaskie, L. E
Format: Article
Language:English
Subjects:
Applied sciences
Biodegradation, Environmental
Cobalt - metabolism
Crystallization
Durapatite - metabolism
Exact sciences and technology
Industrial wastewaters
Ion Exchange
Ions
Microscopy, Electron, Scanning
Pollution
Radioactive wastes
Remediation and Control Technologies
Serratia - metabolism
Strontium - metabolism
Surface Properties
Wastes
Wastewaters
Water - chemistry
Water treatment and pollution
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Summary:Biomineral hydroxyapatite (Bio-HAp) produced by Serratia sp. has the potential to be a suitable material for the remediation of metal contaminated waters and as a radionuclide waste storage material. Varying the Bio-HAp manufacturing method was found to influence hydroxyapatite (HAp) properties and consequently the uptake of Sr2+ and Co2+. All the Bio-HAp tested in this study were more efficient than the commercially available hydroxyapatite (Com-HAp) for Sr2+ and Co2+ uptake. For Bio-HAp the uptake for Sr2+ and Co2+ ranged from 24 to 39 and 29 to 78 mmol per 100 g, respectively. Whereas, the uptake of Sr2+ and Co2+ by Com-HAp ranged from 3 to 11 and 4 to 18 mmol per 100 g, respectively. Properties that increased metal uptake were smaller crystallite size (70 m2 g–1). Organic content which influences the structure (e.g., crystallite arrangement, size and surface area) and composition of Bio-HAp was also found to be important in Sr2+ and Co2+ uptake. Overall, Bio-HAp shows promise for the remediation of aqueous metal waste especially since Bio-HAp can be synthesized for optimal metal uptake properties.
ISSN:0013-936X
1520-5851
DOI:10.1021/es2015132