Effect of cation doping on the structure of hydroxyapatite and the mechanism of defluoridation
Source abstract
Abstract
Abstract The structure of three cation-doped hydroxyapatite filter materials with different cation radii and valence states, aluminum-doped hydroxyapatite (Al-HA), magnesium-doped hydroxyapatite (Mg-HA) and lanthanum-doped hydroxyapatite (La-HA), were studied to explore the performance and possible mechanism of defluoridation by means of Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscope (SEM)/Energy-dispersive X-ray spectroscopy (EDS), BET and Zeta potential analysis. The results demonstrated that cation doping with different radii could weaken lattice structure of hydroxyapatite, increase content of hydroxyl group and improve exchange ability with fluoride ions. However, the decisive factor affecting the capacity of fluoride removal was valence state of doped ion, because defluoridation capacity of Al-HA and La-HA with trivalent cations were larger than Mg-HA with bivalent cation. In addition, other studies related to the process of defluorination were carried out. The mechanism of defluoridation mainly included physical adsorption and chemical adsorption. First, F- was deposited on the surface of the filter material by physical adsorption. After F- diffused into the voids of the filter interval, and underwent ion exchange and complexation with -OH functional group in the lattice. Cation-doped hydroxyapatite structure and mechanism of fluoride removal were of great significance in the field of environmental governance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fluoride Effects and Removal · Dental Erosion and Treatment · Dental Trauma and Treatments
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
Show source-provided references
1. Biological and medical significance of calcium phosphates10.1002/1521-3773(20020902)41:17<3130::AID-ANIE3130>3.0.CO;2-1 ↗
2. Substituted hydroxyapatites for biomedical applications: a review10.1016/j.ceramint.2015.03.316 ↗
3. Monoclinic hydroxyapatite10.1126/science.180.4090.1055 ↗
4. Hydroxyapatite: hexagonal or monoclinic?10.1021/cg900156w ↗
5. Periodic ab initio study of structural and vibrational features of hexagonal hydroxyapatite Ca10(PO4)6(OH)210.1039/b602419j ↗
6. Ab initio elastic properties and tensile strength of crystalline hydroxyapatite10.1016/j.actbio.2009.04.030 ↗
7. Nanosize hydroxyapatite: doping with various ions10.1179/1743676110Y.0000000005 ↗
8. Novel apatite-based sorbent for defluoridation: synthesis and sorption characteristics of nanomicro-crystalline hydroxyapatite-coated-limestone10.1021/es405135r ↗
9. Enhanced fluoride adsorption using Al (III) modified calicium hydroxyapatite10.1016/j.jhazmat.2012.07.020 ↗
10. Removal of reactive red 141 dye from aqueous solution by titanium hydroxyapatite pellets
11. Copper Doping Improves Hydroxyapatite Sorption for Arsenate in Simulated Groundwaters10.1021/es9015734 ↗
12. Performance of novel hydroxyapatite nanowires in treatment of fluoride contaminated water10.1016/j.jhazmat.2015.10.028 ↗
13. Synthesis and characterization of Eu-doped hydroxyapatite through a microwave assisted microemulsion process10.1016/j.solidstatesciences.2009.07.013 ↗
14. Comparative characterization of microstructure and luminescence of europium doped hydroxyapatite nanoparticles via coprecipitation and hydrothermal method10.1016/j.ijleo.2015.09.136 ↗
15. Controlled synthesis of hydroxyapatite crystals templated by novel surfactants and their enhanced bioactivity10.1039/C0NJ00708K ↗
16. Synthesis of surface coated hydroxyapatite powders for fluoride removal from aqueous solution10.1016/j.powtec.2014.08.041 ↗
17. Fabrication and characterization of porous hydroxyapatite granules10.1016/0142-9612(95)00301-0 ↗
18. Preparation and defluorination mechanism of a novel copolymerized hydroxyapatite–aluminium chloride material10.1039/C5RA20372D ↗
19. Assembly of nano-sized hydroxyapatite onto graphene oxide sheets via in-situ fabrication method and its prospective application for defluoridation studies10.1016/j.cej.2016.04.111 ↗
20. Zinc incorporation into hydroxylapatite10.1016/j.biomaterials.2009.01.043 ↗
21. Magnesium incorporated hydroxyapatite: synthesis and structural properties characterization10.1016/j.ceramint.2013.11.051 ↗
22. Enhanced osteoconductivity of sodium-substituted hydroxyapatite by system instability10.1002/jbm.b.33087 ↗
23. Synthesis and thermal stability of potassium substituted hydroxyapatites and hydroxyapatite/β-tricalciumphosphate mixtures10.1016/j.ceramint.2006.05.016 ↗
24. Chemical and physical properties of carbonated hydroxyapatite affect breast cancer cell behavior10.1016/j.actbio.2015.06.001 ↗
25. Synthesis, bioactivity and zeta potential investigations of chlorine and fluorine substituted hydroxyapatite10.1016/j.msec.2015.10.002 ↗
26. Magnesium substitution in carbonated hydroxyapatite: structural and microstructural characterization by Rietveld's refinement10.1016/j.matchemphys.2015.12.058 ↗
27. Ag-doped hydroxyapatite as efficient adsorbent for removal of Congo red dye from aqueous solution: Synthesis, kinetic and equilibrium adsorption isotherm analysis10.1016/j.micromeso.2015.08.003 ↗
28. Paramagnetic iron-doped hydroxyapatite nanoparticles with improved metal sorption properties. A bioorganic substrates-mediated synthesis10.1021/am405217j ↗
29. Cation doped hydroxyapatite nanoparticles enhance strontium adsorption from aqueous system: a comparative study with and without calcination10.1016/j.clay.2016.09.022 ↗
30. Defluoridation studies with synthesized magnesium-incorporated hydroxyapatite and parameter optimization using response surface methodology10.1080/19443994.2016.1167628 ↗
31. Fluoride in drinking water and defluoridation of water10.1021/cr2002855 ↗
32. World Health Organization (WHO) · 2011 · 370
33. A review on adsorbents used for defluoridation of drinking water10.1007/s11157-014-9356-0 ↗
34. Fluoride removal from water by adsorption—A review10.1016/j.cej.2011.05.028 ↗
35. Removal of Fluoride from Drinking Water Using Novel Adsorbent Magnesia-Hydroxyapatite10.1007/s11270-015-2515-2 ↗
36. Improving the osteogenic and angiogenic properties of synthetic hydroxyapatite by dual doping of bivalent cobalt and magnesium ion10.1016/j.ceramint.2015.05.090 ↗
37. Structural analysis of metal-doped (Mn, Fe, Co, Ni, Cu, Zn) calcium hydroxyapatite synthetized by a sol-gel microwave-assisted method10.1016/j.ceramint.2017.06.154 ↗
38. Magnesium incorporated hydroxyapatite: synthesis and structural properties characterization10.1016/j.ceramint.2013.11.051 ↗
39. Magnesium incorporation into hydroxyapatite10.1016/j.biomaterials.2010.11.017 ↗
40. Hydrothermal synthesis of nanosized pure and cobalt-exchanged hydroxyapatite10.1080/10426910903032113 ↗
41. New theoretical expressions for the five adsorption type isotherms classified by BET based on statistical physics treatment10.1016/S0021-9797(03)00139-5 ↗
42. Accuracy of Dubinin-Astakov and Dubinin-Raduchkevic adsorption isotherm models in evaluating micropore volume of Bontonite