Influence of pH, competing ions, and salinity on the sorption of strontium and cobalt onto biogenic hydroxyapatite

Stephanie Handley-Sidhu, Thomas K. Mullan, Quentin Grail, Malek Albadarneh, Toshihiko Ohnuki, Lynne E. MacAskie

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Anthropogenic radionuclides contaminate a range of environments as a result of nuclear activities, for example, leakage from waste storage tanks/ponds (e.g. Hanford, USA or Sellafield sites, UK) or as a result of large scale nuclear accidents (e.g. Chernobyl, Ukraine or Fukushima, Japan). One of the most widely applied remediation techniques for contaminated waters is the use of sorbent materials (e.g. zeolites and apatites). However, a key problem at nuclear contaminated sites is the remediation of radionuclides from complex chemical environments. In this study, biogenic hydroxyapatite (BHAP) produced by Serratia sp. bacteria was investigated for its potential to remediate surrogate radionuclides (Sr2+ and Co2+) from environmentally relevant waters by varying pH, salinity and the type and concentration of cations present. The sorption capacity of the BHAP for both Sr2+ and Co2+ was higher than for a synthetically produced hydroxyapatite (HAP) in the solutions tested. BHAP also compared favorably against a natural zeolite (as used in industrial decontamination) for Sr 2+ and Co 2+ uptake from saline waters. Results confirm that hydroxyapatite minerals of high surface area and amorphous calcium phosphate content, typical for biogenic sources, are suitable restoration or reactive barrier materials for the remediation of complex contaminated environments or wastewaters.

LanguageEnglish
Article number23361
Number of pages8
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 18 Mar 2016

Fingerprint

Strontium
Hydroxyapatite
Sorption
Cobalt
Remediation
Radioisotopes
Ions
Decontamination
Saline water
Apatite
Calcium phosphate
Ponds
Sorbents
Zeolites
Restoration
Water
Bacteria
Accidents
Wastewater
Minerals

Keywords

  • biomaterials
  • pollution remediation

Cite this

Handley-Sidhu, Stephanie ; Mullan, Thomas K. ; Grail, Quentin ; Albadarneh, Malek ; Ohnuki, Toshihiko ; MacAskie, Lynne E. / Influence of pH, competing ions, and salinity on the sorption of strontium and cobalt onto biogenic hydroxyapatite. In: Scientific Reports. 2016 ; Vol. 6.
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Influence of pH, competing ions, and salinity on the sorption of strontium and cobalt onto biogenic hydroxyapatite. / Handley-Sidhu, Stephanie; Mullan, Thomas K.; Grail, Quentin; Albadarneh, Malek; Ohnuki, Toshihiko; MacAskie, Lynne E.

In: Scientific Reports, Vol. 6, 23361, 18.03.2016.

Research output: Contribution to journalArticle

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