Mechanism of aqueous uranium(VI) uptake by hydroxyapatite

Krestou, Athina; Xenidis, Anthimos; Panias, D.

doi:10.1016/j.mineng.2003.11.019

Cited by 173 publications

(111 citation statements)

References 18 publications

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“…Calcium phosphate, the major component of bone, is well known to have high retention properties for transition metal ions, 10,13,[15][16][17] and therefore has been suggested as a means for metal pollution remediation. 18 Where biomineralization occurs, the initially amorphous calcium phosphate (ACP) is deposited by precipitation from solution as a result of super saturation. 19,20 This metastable phase is then converted to hydroxyapatite (HAP) by dissolution and reprecipitation.…”

Section: Introductionmentioning

confidence: 99%

The entrapment of corrosion products from CoCr implant alloys in the deposits of calcium phosphate: A comparison of serum, synovial fluid, albumin, EDTA, and water

Lewis

Kilburn

Heard

et al. 2006

Journal Orthopaedic Research

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Physical wear of orthopedic implants is inevitable. CoCr alloy samples, typically used in joint reconstruction, corrode rapidly after removal of the protective oxide layer. The behavior of CoCr pellets immersed in human serum, foetal bovine serum (FBS), synovial fluid, albumin in phosphate-buffered saline (PBS), EDTA in PBS, and water were studied using X-ray Photoelectron Spectroscopy (XPS) and Time-of-Flight Secondary Ion Mass Spectroscopy (ToF-SIMS). The difference in the corrosive nature of human serum, water, albumin in PBS and synovial fluid after 5 days of immersion was highlighted by the oxide layer, which was respectively 15, 3.5, 1.5, and 1.5 nm thick. The thickness of an additional calcium phosphate deposit from human serum and synovial fluid was 40 and 2 nm, respectively. Co and Cr ions migrated from the bulk metal surface and were trapped in this deposit by the phosphate anion. This may account for the composition of wear debris from CoCr orthopedic implants, which is known to consist predominantly of hydroxy-phosphate compounds. Known components of synovial fluid including proteoglycans, pyrophosphates, phospholipids, lubricin, and superficial zone protein (SZP), have been identified as possible causes for the lack of significant calcium phosphate deposition in this environment. Circulation of these compounds around the whole implant may inhibit calcium phosphate deposition. ß

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Section: Introductionmentioning

confidence: 99%

The entrapment of corrosion products from CoCr implant alloys in the deposits of calcium phosphate: A comparison of serum, synovial fluid, albumin, EDTA, and water

Lewis

Kilburn

Heard

et al. 2006

Journal Orthopaedic Research

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“…13,14) From these points of view, morphological design for HAp based materials is important in order to obtain its full functions. Especially, HAp microsphere is expected to be a good candidate for use as drug delivery system (DDS) materials and resource powder of 3D printer.…”

Section: ¹mentioning

confidence: 99%

“…13) Since HAP also shows excellent ion exchange ability, the developments of HAp based functional materials have been performed by doping of functional elements that provide a novel properties to HAp. 412) For example, the doping of Fe 3+ and SiO 4…”

Section: Introductionmentioning

confidence: 99%

Preparation of Iron Doped Hydroxyapatite Microsphere by Mist Process

Sato

Nakahira

2014

Mater. Trans.

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Hydroxyapaite and Fe doped hydroxyapatite microsphere were prepared by mist process using Ca(NO 3 ) 2 , FeCl 3 and (NH 4 ) 2 HPO 4 aqueous solutions, and the effects of the preparation condition and Fe doping on the crystal phase, microstructure and other properties were investigated. From XRD analysis, obtained powders were HAp in a single phase at the Ca/P ratio from 1.5 to 2.0, independent from preparation temperature and gas flow rate. In the case of the Ca/P ratio of 1.0, obtained powder was mixed phase of HAp and Ca 2 P 2 O 7 . The crystallinity of powders strongly depended on preparation temperature and flow rate of carrier gas and was enhanced with decreasing flow rate of argon and increasing preparation temperature. The SEM observation suggested that the obtained samples had a fine microsphere consisted of further smaller primary grains. The microsphere size of sample was about 1 µm, and size distribution was between 0.5 and 5 µm.

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“…In the past decades, many methods have been developed for uranium(VI) removal from aqueous solutions [3][4][5][6][7][8][9][10][11] ,such as ionic exchange, chemical precipitation [12,13], membrane dialysis [14], flotation [15,16], bio-concentration [17], liquid-liquid extractions [18,19], solid-liquid separation [5,20,21]. At present, solid-liquid separation is recognized as the widest application prospect because it can work more efficiently and it is environment-friendly.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of polyamidoxime-functionalized nanoparticles for uranium(VI) removal from neutral aqueous solutions

Huang

Zhang²,

Hua

2015

J Radioanal Nucl Chem

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It is important to separate uranium(VI) from water environment due to its high toxicity and radioactivity. A new kind of polystyrene nanoparticles with polyamidoxime is reported here for removal of uranium(VI) from aqueous solutions. The obtained PSt nanoparticles have a tunable sorption capacity. The sorption process follows pseudo-second-order kinetics, and the equilibrium can be reached within 6 h. Furthermore, the optimal pH value of sorption process is 6.5, and the adsorbents can be recycled well for uranium(VI) sorption from aqueous solution. This work indicates that the polyamidoxime-functionalized PSt nanoparticles may be used as a good adsorbent for the removal of uranium(VI) from neutral aqueous solution.

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Mechanism of aqueous uranium(VI) uptake by hydroxyapatite

Cited by 173 publications

References 18 publications

The entrapment of corrosion products from CoCr implant alloys in the deposits of calcium phosphate: A comparison of serum, synovial fluid, albumin, EDTA, and water

The entrapment of corrosion products from CoCr implant alloys in the deposits of calcium phosphate: A comparison of serum, synovial fluid, albumin, EDTA, and water

Preparation of Iron Doped Hydroxyapatite Microsphere by Mist Process

Synthesis of polyamidoxime-functionalized nanoparticles for uranium(VI) removal from neutral aqueous solutions

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