Nano-crystalline hydroxyapatite bio-mineral for the treatment of strontium from aqueous solutions

Stephanie Handley-Sidhu; Joanna C. Renshaw; Ping Yong; Robert Kerley; Lynne E. Macaskie

doi:10.1007/s10529-010-0391-9

Nano-crystalline hydroxyapatite bio-mineral for the treatment of strontium from aqueous solutions

Stephanie Handley-Sidhu, Joanna C. Renshaw, Ping Yong, Robert Kerley, Lynne E. Macaskie

Civil And Environmental Engineering

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

Hydroxyapatites were analysed using electron microscopy, X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis. Examination of a bacterially produced hydroxyapatite (Bio-HA) by scanning electron microscopy showed agglomerated nano-sized particles; XRD analysis confirmed that the Bio-HA was hydroxyapatite, with an organic matter content of 7.6%; XRF analysis gave a Ca/P ratio of 1.55, also indicative of HA. The size of the Bio-HA crystals was calculated as ~25 nm from XRD data using the Scherrer equation, whereas Comm-HA powder size was measured as ≤50 μm. The nano-crystalline Bio-HA was ~7 times more efficient in removing Sr ²⁺ from synthetic groundwater than Comm-HA. Dissolution of HA as indicated by the release of phosphate into the solution phase was higher in the Comm-HA than the Bio-HA, indicating a more stable biomaterial which has a potential for the remediation of contaminated sites.

Original language	English
Pages (from-to)	79-87
Number of pages	9
Journal	Biotechnology Letters
Volume	33
Issue number	1
DOIs	https://doi.org/10.1007/s10529-010-0391-9
Publication status	Published - 1 Jan 2011

Keywords

biomineralisation
bioremediation
hydroxyapatite
nanoparticles
strontium removal
aqueous solutions
biomineral
nano-crystalline hydroxyapatite

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10.1007/s10529-010-0391-9

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title = "Nano-crystalline hydroxyapatite bio-mineral for the treatment of strontium from aqueous solutions",

abstract = "Hydroxyapatites were analysed using electron microscopy, X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis. Examination of a bacterially produced hydroxyapatite (Bio-HA) by scanning electron microscopy showed agglomerated nano-sized particles; XRD analysis confirmed that the Bio-HA was hydroxyapatite, with an organic matter content of 7.6%; XRF analysis gave a Ca/P ratio of 1.55, also indicative of HA. The size of the Bio-HA crystals was calculated as ~25 nm from XRD data using the Scherrer equation, whereas Comm-HA powder size was measured as ≤50 μm. The nano-crystalline Bio-HA was ~7 times more efficient in removing Sr 2+ from synthetic groundwater than Comm-HA. Dissolution of HA as indicated by the release of phosphate into the solution phase was higher in the Comm-HA than the Bio-HA, indicating a more stable biomaterial which has a potential for the remediation of contaminated sites. ",

keywords = "biomineralisation, bioremediation, hydroxyapatite, nanoparticles, strontium removal, aqueous solutions, biomineral, nano-crystalline hydroxyapatite",

author = "Stephanie Handley-Sidhu and Renshaw, {Joanna C.} and Ping Yong and Robert Kerley and Macaskie, {Lynne E.}",

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T1 - Nano-crystalline hydroxyapatite bio-mineral for the treatment of strontium from aqueous solutions

AU - Handley-Sidhu, Stephanie

AU - Renshaw, Joanna C.

AU - Yong, Ping

AU - Kerley, Robert

AU - Macaskie, Lynne E.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Hydroxyapatites were analysed using electron microscopy, X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis. Examination of a bacterially produced hydroxyapatite (Bio-HA) by scanning electron microscopy showed agglomerated nano-sized particles; XRD analysis confirmed that the Bio-HA was hydroxyapatite, with an organic matter content of 7.6%; XRF analysis gave a Ca/P ratio of 1.55, also indicative of HA. The size of the Bio-HA crystals was calculated as ~25 nm from XRD data using the Scherrer equation, whereas Comm-HA powder size was measured as ≤50 μm. The nano-crystalline Bio-HA was ~7 times more efficient in removing Sr 2+ from synthetic groundwater than Comm-HA. Dissolution of HA as indicated by the release of phosphate into the solution phase was higher in the Comm-HA than the Bio-HA, indicating a more stable biomaterial which has a potential for the remediation of contaminated sites.

AB - Hydroxyapatites were analysed using electron microscopy, X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis. Examination of a bacterially produced hydroxyapatite (Bio-HA) by scanning electron microscopy showed agglomerated nano-sized particles; XRD analysis confirmed that the Bio-HA was hydroxyapatite, with an organic matter content of 7.6%; XRF analysis gave a Ca/P ratio of 1.55, also indicative of HA. The size of the Bio-HA crystals was calculated as ~25 nm from XRD data using the Scherrer equation, whereas Comm-HA powder size was measured as ≤50 μm. The nano-crystalline Bio-HA was ~7 times more efficient in removing Sr 2+ from synthetic groundwater than Comm-HA. Dissolution of HA as indicated by the release of phosphate into the solution phase was higher in the Comm-HA than the Bio-HA, indicating a more stable biomaterial which has a potential for the remediation of contaminated sites.

KW - biomineralisation

KW - bioremediation

KW - hydroxyapatite

KW - nanoparticles

KW - strontium removal

KW - aqueous solutions

KW - biomineral

KW - nano-crystalline hydroxyapatite

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JO - Biotechnology Letters

JF - Biotechnology Letters

SN - 0141-5492

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ER -

Nano-crystalline hydroxyapatite bio-mineral for the treatment of strontium from aqueous solutions

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Keywords

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Biogeochemical Applications in Nuclear Decommissioning and Waste Disposal

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Nano-crystalline hydroxyapatite bio-mineral for the treatment of strontium from aqueous solutions

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Biogeochemical Applications in Nuclear Decommissioning and Waste Disposal

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