Preparation of porous alumina hollow spheres as an adsorbent for fluoride removal from water with low aluminum residual
Source abstract
Abstract
Abstract Amorphous aluminum hydroxide hollow spheres were synthesized and characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and thermal gravimetric analysis. The obtained amorphous aluminum hydroxide hollow spheres were an excellent precursor for the fabrication of porous alumina hollow spheres via a simple thermal transformation process. The influence of the calcination temperature on the fluoride removal performance and the concentration of the residual aluminum ions were investigated. With the calcination temperature of 800 °C, the concentration of the residual aluminum ions was low than that of WHO guideline (0.2 mg L −1 ), and the corresponding adsorption capacity towards fluoride at neutral pH was 16.77 mg g −1 . When the calcination temperature lower than 800 °C, both of the fluoride adsorption capacity and the concentration of the residual aluminum ions were increased. Batch experiments were performed to study the influence of various experimental parameters such as contact time, initial concentration, pH value and the presence of competing anions on the adsorption of fluoride on porous alumina hollow spheres prepared with the calcination temperature of 800 °C. The fluoride adsorption can be well described by the Langmuir model, and the kinetic data was well fitted to pseudo-second-order model. The co-existing carbonate and phosphate anions have great influence on fluoride removal. Furthermore, the regeneration and recyclability of the obtained porous alumina hollow spheres were evaluated.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fluoride Effects and Removal · Esophageal and GI Pathology · Phosphorus and nutrient management
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
Show source-provided references
1. Molecular mechanisms of fluoride toxicity10.1016/j.cbi.2010.07.011 ↗
2. Fluoride in drinking water: a review on the status and stress effects10.1080/10643380600678112 ↗
3. WHO, Guidelines for Drinking-water Quality, First Addendum to Third Edition, 2006.
4. Fluoride in drinking water and defluoridation of water10.1021/cr2002855 ↗
5. Fluoride removal from water by adsorption–a review10.1016/j.cej.2011.05.028 ↗
6. Adsorption of fluoride from water by aligned carbon nanotubes10.1016/S0025-5408(02)01063-2 ↗
7. A facile precipitation synthesis of mesoporous 2-line ferrihydrite with good fluoride removal properties10.1039/C5RA15619J ↗
8. Removal of fluoride from aqueous solution by CaO nanoparticles
9. Excellent fluoride removal properties of porous hollow MgO microspheres10.1039/C4NJ01361A ↗
10. Remediating fluoride from water using hydrous zirconium oxide10.1016/j.cej.2012.05.084 ↗
11. Removal of fluoride from drinking water by adsorption onto alum-impregnated activated alumina10.1016/j.seppur.2005.11.036 ↗
12. Fluoride and arsenic removal performance of highly ordered mesoporous aluminas10.1016/j.jhazmat.2011.10.025 ↗
13. Fluoride removal by ordered and disordered mesoporous aluminas10.1016/j.micromeso.2014.06.010 ↗
14. Residual aluminium in water defluoridated using activated alumina adsorption–modeling and simulation studies10.1016/j.watres.2010.02.028 ↗
15. Pharmacological and toxicological effects of aluminofluoride complexes
16. Aluminium as a risk factor in Alzheimer's disease, with emphasis on drinking water10.1016/S0361-9230(01)00459-2 ↗
17. WHO, Environmental Health Criteria for Aluminium, 194, 1997.
18. Surface acidity of amorphous aluminum hydroxide10.1111/j.1755-6724.2006.tb00232.x ↗
19. Preparation of dispersed aluminum hydroxide nanoparticles via non-aqueous route and surface modification10.1016/j.matchemphys.2012.06.002 ↗
20. Anomalous reduction in surface area during mechanical activation of boehmite synthesized by thermal decomposition of gibbsite10.1016/j.powtec.2010.12.010 ↗
21. Abrupt structural transformation in hydrotalcite-like compounds Mg1−xAlx(OH)2(NO3)x·nH2O as a continuous function of nitrate anions10.1021/jp0029257 ↗
22. Coordination of acetate to Al(III) in aqueous solution and at the water-aluminum hydroxide interface: a potentiometric and attenuated total reflectance FTIR study10.1016/S0016-7037(98)00260-9 ↗
23. Study on the photochromism of Ni–Al layered double hydroxides containing nitrate anions10.1002/ejic.200600058 ↗
24. Meso/macroporous γ-Al2O3 fabricated by thermal decomposition of nanorods ammonium aluminium carbonate hydroxide10.1016/j.materresbull.2011.12.026 ↗
25. Hydrothermal crystallization of boehmite from freshly precipitated aluminium hydroxide10.1016/S0167-577X(99)00088-9 ↗
26. Facile synthesis of monodisperse α-alumina nanoparticles via an isolation-medium-assisted calcination method10.1007/s00339-014-8368-5 ↗
27. Hydrothermal synthesis of nanosize α-Al2O3 from seeded aluminum hydroxide10.1111/j.1151-2916.1998.tb02687.x ↗
28. Gas adsorption characterization of ordered organic inorganic nanocomposite materials10.1021/cm0101069 ↗
29. Millimeter-sized Mg–Al-LDH nanoflake impregnated magnetic alginate beads (LDH-n-MABs): a novel bio-based sorbent for the removal of fluoride in water10.1039/C3TA13526H ↗
30. Fluoride removal mechanism of bayerite/boehmite nanocomposites: roles of the surface hydroxyl groups and the nitrate anions10.1016/j.jcis.2014.10.069 ↗
31. Surfactant-free preparation of nickel carbonate hydroxide in aqueous solution and its toxic ion-exchange properties10.1039/C2NJ40983F ↗
32. Two-step self-assembly of iron oxide into three-dimensional hollow magnetic porous microspheres and their toxic ion adsorption mechanism10.1039/C2DT32522E ↗
33. Controlled synthesis of natroalunite microtubes and spheres with excellent fluoride removal performance10.1016/j.cej.2015.03.011 ↗
34. Porous 2-line ferrihydrite/bayerite composites (LFBC): fluoride removal performance and mechanism10.1016/j.cej.2015.01.080 ↗
35. The adsorption of gases on plane surfaces of glass, mica, and platinum10.1021/ja02242a004 ↗
36. Over the adsorption in solution
37. Defluoridation from aqueous solutions by granular ferric hydroxide (GFH)10.1016/j.watres.2008.10.031 ↗
38. Fluoride removal from aqueous solutions by boehmite10.1007/s11270-011-0925-3 ↗
39. Removal of fluoride ions from aqueous solution by the calcination product of Mg–Al–Fe hydrotalcite-like compound10.1016/j.desal.2010.09.045 ↗
40. Adsorption of fluoride from water by amorphous alumina supported on carbon nanotubes10.1016/S0009-2614(01)01351-3 ↗
41. Enhanced adsorptive removal of fluoride using mesoporous alumina10.1016/j.micromeso.2009.07.007 ↗
42. Studies on electrospun alumina nanofibers for the removal of chromium(VI) and fluoride toxic ions from an aqueous system10.1021/ie301586j ↗
43. Equilibrium, kinetics and breakthrough studies for adsorption of fluoride on activated alumina10.1016/j.seppur.2004.09.001 ↗
44. Defluoridation from aqueous solutions by nano-alumina: characterization and sorption studies10.1016/j.jhazmat.2010.11.102 ↗
45. Defluoridation performance and mechanism of nano-scale aluminum oxide hydroxide in aqueous solution10.1002/jctb.2131 ↗
46. A convenient method to determine kinetic parameters of adsorption processes by nonlinear regression of pseudo nth-order equation10.1016/j.cej.2013.10.013 ↗
47. Pseudo-second-order model for sorption processes10.1016/S0032-9592(98)00112-5 ↗
48. Adsorption of fluoride onto mixed rare earth oxides10.1016/S1383-5866(00)00219-7 ↗