Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 45, Issue 16, Pages 6985-6990Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es2015132
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Funding
- EPSRC [EP/E012213/1, EP/G063699/1]
- NERC Facility for Environmental Nanoscience Analysis and Characterisation (FENAC)
- JSPS [11146117, GR 078]
- global COE program
- Advantage West Midlands (AWM)
- European Regional Development Fund (ERDF)
- EPSRC [EP/G063699/1, EP/E012213/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G063699/1, EP/E012213/1] Funding Source: researchfish
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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 Sr+2 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 (<40 nm) and higher surface area (>70 m(2) 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.
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