Optimization of hydrocalumite preparation under microwave irradiation for recovering aluminium from a saline slag
Source abstract
Abstract
Aluminium was successfully extracted by treating an aluminium slag with aqueous NaOH under reflux conditions. This solution was purified by precipitation of silicon species by addition of HCl up to pH = 1, and used for preparing hydrocalumite (Ca2Al(OH)6Cl·2H2O) by the coprecipitation method. The effect of temperature on the properties of hydrocalumite prepared under microwave (MW) irradiation was studied. Characterization of the obtained solid was carried out by powder X-ray diffraction (PXRD), thermal analysis, FT–IR spectroscopy, chemical analysis, electron microscopy and N2 adsorption–desorption at −196 °C. The results showed that the use of the extracted aluminium solution allowed to obtain hydrocalumite by the coprecipitation method and that the temperature of the MW ageing treatment had a large effect on the formation of side phases, in addition to hydrocalumite. The results here reported demonstrate that formation of hydrocalumite is an effective method for the recovering of aluminium from its waste.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Nanomaterials for catalytic reactions · Bauxite Residue and Utilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (62)
Show source-provided references
1. CaO supported on mesoporous silicas as basic catalysts for transesterification reactions10.1016/j.apcata.2007.09.028 ↗
2. Análisis microestructural por DRX de CaO obtenido a partir de carbonato cálcico molido (CCM)10.3989/cyv.2004.v43.i1.621 ↗
3. Incidencia de la radiación microondas en la cristalinidad de materiales laminares10.3989/cyv.2004.v43.i1.615 ↗
4. Microwave-hydrothermally aged Zn, Al hydrotalcite-like compounds: influence of the composition and the irradiation conditions10.1016/j.micromeso.2007.06.013 ↗
5. Microwaves and layered double hydroxides: a smooth understanding10.1351/PAC-CON-08-07-01 ↗
6. Characterisation and treatment of Australian salt cakes by aqueous leaching10.1016/j.mineng.2007.08.020 ↗
7. Recovery of valuable materials from aluminium salt cakes10.1016/j.minpro.2009.05.002 ↗
8. Hydrotalcite-type anionic clays: preparation, properties and applications10.1016/0920-5861(91)80068-K ↗
9. Treatment of salt cakes by aqueous leaching and Bayer-type digestion10.1016/j.mineng.2007.12.001 ↗
10. Layered double hydroxides: synthesis and post-synthesis modification
11. Directive 2010/75/EU of the European Parliament and of the Council · 2010
12. Multiwavelength luminescence in lanthanide-doped hydrocalumite and mayenite10.1021/cm200408x ↗
13. Crystal structure and X-ray identification of layered double hydroxides
14. Hydrotalcite-like compounds: a way to recover a hazardous waste in the aluminium tertiary industry10.1016/j.clay.2014.03.022 ↗
15. Synthesis and characterisation of hydrotalcites produced by an aluminium hazardous waste: a comparison between the use of ammonia and the use of triethanolamine10.1016/j.clay.2015.07.032 ↗
16. Temperature effects on the dissolution-precipitation synthesis of hydrocalumite10.1063/1.5084829 ↗
17. Green synthesis of hydrocalumite (CaAl-OH-LDH) from Ca(OH)2 and Al(OH)3 and the parameters that influence its formation and speciation10.3390/cryst10080672 ↗
18. Management of the salt cake from secondary aluminum fusion processes10.1021/ie050835o ↗
19. Gil · 2010
20. Management and valorization of aluminum saline slags: current status and future trends10.1016/j.cej.2015.12.069 ↗
21. Valorization of the saline slags generated during secondary aluminium melting processes as adsorbents for the removal of heavy metal ions from aqueous solutions10.1016/j.cej.2014.04.056 ↗
22. Application of industrial wastes from chemically treated aluminum saline slags as adsorbents10.1021/acsomega.8b02397 ↗
23. Synthesis and CO2 adsorption properties of hydrotalcite-like compounds prepared from aluminum saline slag wastes10.1016/j.cej.2017.11.100 ↗
24. Effect of microwaves, ultrasounds and interlayer anion on the hydrocalumites synthesis10.1016/j.micromeso.2014.08.004 ↗
25. Effect of the preparation conditions on the catalytic activity of calcined Ca/Al-layered double hydroxides for the synthesis of glycerol carbonate10.1016/j.apcata.2017.02.013 ↗
26. Assessment through FT-IR of surface acidity and basicity of hydrocalumites by nitrile adsorption10.1016/j.clay.2019.105180 ↗
27. Hudson Institute of Mineralogy · 2021
28. Jenkins · 1978
29. Synthesis of pollucite and analcime zeolites by recovering aluminum from a saline slag10.1016/j.jclepro.2021.126667 ↗
30. Chemistry and morphology of hydrogarnets formed in cement-based CASH hydroceramics cured at 200° to 350°C10.1111/j.1551-2916.2009.02958.x ↗
31. Heat stabilising flexible PVC with layered double hydroxide derivatives10.1016/j.polymdegradstab.2015.01.016 ↗
32. Layered double hydroxide derivatives as flame retardants for flexible PVC10.1002/masy.201800148 ↗
33. 1995
34. Carbonated hydrocalumite synthesized by the microwave method as a possible antacid10.1016/j.msec.2016.01.007 ↗
35. Characterization of synthetic hydrocalumite-type [Ca2Al(OH)6]NO3·mH2O: effect of the calcination temperature10.1007/BF00489810 ↗
36. Mineralogy Database · 2021
37. Synthesis of various layered double hydroxides using aluminum dross generated in aluminum recycling process10.1016/j.minpro.2012.03.011 ↗
38. Nakamoto · 2008
39. Nyquist · 2001
40. Formation behavior of tricalcium aluminate hexahydrate in synthetic sodium aluminate solution with high alkali concentration and caustic ratio10.1016/j.hydromet.2020.105373 ↗
41. Fast aging treatment for the synthesis of hydrocalumites using microwaves10.1016/j.clay.2013.05.006 ↗
42. Mechanism of the anion exchange reactions of the layered double hydroxides (LDHs) of Ca and Mg with Al10.1016/j.solidstatesciences.2005.05.004 ↗
43. 2001
44. Layered double hydroxides (LDH) intercalated with metal coordination compounds and oxometalates10.1016/S0010-8545(98)00216-1 ↗
45. Cu–Ca–Al catalysts derived from hydrocalumite and their application to ethanol dehydrogenation10.1007/s11144-018-1513-y ↗
46. Insights on the structural chemistry of hydrocalumite and hydrotalcite-like materials: investigation of the series Ca2M3+(OH)6Cl·2H2O (M3+: Al3+, Ga3+, Fe3+, and Sc3+) by X-ray powder diffraction10.1006/jssc.2002.9635 ↗
47. Innovative method for hydrocalumite-like compounds' preparation and their evaluation in the transesterification reaction10.1016/j.clay.2015.07.004 ↗
48. Zn-Ti-Al layered double hydroxides synthesized from aluminum saline slag wastes as efficient drug adsorbents10.1016/j.clay.2020.105486 ↗
49. Saline slag waste as an aluminum source for the synthesis of Zn-Al-Fe-Ti layered double-hydroxides as catalysts for the photodegradation of emerging contaminants10.1016/j.jallcom.2020.156007 ↗
50. Crystal-chemical study of layered (Al2Li(OH)6)+X−.nH2O10.1346/CCMN.1982.0300303 ↗
51. Physical and nanomechanical properties of the synthetic anhydrous crystalline CaCO3 polymorphs: vaterite, aragonite and calcite10.1007/s10853-017-1884-x ↗
52. Glycerol carbonate production from transesterification of glycerol with diethyl carbonate catalyzed by Ca/Al-mixed oxides derived from hydrocalumite
53. Sverdlin · 2003
54. Szabados · J. Catal. · 2020 · 391 · 28210.1016/j.jcat.2020.07.038 ↗
55. Removal mechanism of arsenate by bimetallic and trimetallic hydrocalumites depending on arsenate concentration10.1016/j.clay.2016.05.010 ↗
56. Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)10.1515/pac-2014-1117 ↗
57. Aluminium salt slag characterization and utilization - a review10.1016/j.jhazmat.2012.03.052 ↗
58. Aluminium recovery during black dross hydrothermal treatment10.1016/j.jece.2013.03.004 ↗
59. Factors influencing staging during anion-exchange intercalation into [LiAl2(OH)6]X·mH2O (X = Cl−, Br−, NO3−)10.1021/cm0503275 ↗
60. World Bureau of Metal Statistics
61. Zeolite synthesis from industrial wastes10.1016/j.micromeso.2019.06.009 ↗
62. Antioxidant intercalated hydrocalumite as multifunction nanofiller for Poly(propylene): synthesis, thermal stability, light stability, and anti-migration property10.1016/j.polymdegradstab.2017.04.012 ↗