Systematic screening of layered double hydroxides for phosphate removal and mechanism insight
Source abstract
Abstract
Abstract To optimize the chemical composition of layered double hydroxides (LDH) as phosphate adsorbents and further discuss the adsorption mechanism, 14 LDH were synthesized from theoretically feasible, inexpensive and innoxious (or low noxious) precursors through the coprecipitation method. The morphology, chemical composition and nanostructure of LDH were confirmed by scanning electron microscopy equipped with energy dispersive spectrometer, X-ray diffraction and Fourier transform infrared spectroscopy. Then their adsorption performance were evaluated and compared. Phosphate adsorption by the selected LDH as a function of pH and competing anions were subsequently studied. In a 20 mg-P/L phosphate solution at pH 5.5, LDH with trivalent cation Al3+ had a better performance than Fe3+-based LDH. Phosphate adsorption kinetics of the as-synthesize LDH fitted well with the pseudo-second-order model. Mg2-Al1-Cl-LDH (corresponding to LDH with cations of Mg2+ and Al3+ in Mg2+/Al3+ molar ratio of 2.0 and interlayer anion of Cl−) had a higher phosphate removal and faster kinetics than others did. The isotherm data of Mg2-Al1-Cl-LDH showed a good compliance with Langmiur model, and the maximum adsorption capacity reached 76.1 mg/g under 25 °C. The phosphate adsorption mechanisms were deduced as ion exchange, electrostatic attraction, physical adsorption and ligand exchange. Specifically, ion exchange was the main mechanism.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Phosphorus and nutrient management · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (58)
Show source-provided references
1. Study on the sorption-desorption-regeneration performance of Ca-, Mg- and CaMg-based layered double hydroxides for removing phosphate from water10.1016/j.cej.2014.02.061 ↗
2. Strategic phosphate removal/recovery by a re-usable Mg–Fe–Cl layered double hydroxide10.1016/j.psep.2017.03.009 ↗
3. Auerbach · 2004
4. Boron removal by hydrotalcite-like, carbonate-free Mg–Al–NO3-LDH and a rationale on the mechanism10.1016/j.micromeso.2006.08.004 ↗
5. Characterization of aluminium-based water treatment residual for potential phosphorus removal in engineered wetlands10.1016/j.envpol.2009.04.016 ↗
6. Textural properties of layered double hydroxides: effect of magnesium substitution by copper or iron10.1016/S1387-1811(01)00387-0 ↗
7. Hydrotalcite-type anionic clays: Preparation, properties and applications10.1016/0920-5861(91)80068-K ↗
8. Removal of phosphate from aqueous solution by zeolite synthesized from fly ash10.1016/j.jcis.2006.04.010 ↗
9. Phosphate immobilization from aqueous solution by fly ashes in relation to their composition10.1016/j.jhazmat.2006.06.034 ↗
10. Efficient removal of phosphate by facile prepared magnetic diatomite and illite clay from aqueous solution10.1016/j.cej.2015.11.028 ↗
11. Uptake properties of phosphate on a novel Zr-modified MgFe-LDH(CO3)10.1016/j.jcis.2010.05.068 ↗
12. The adsorption of phosphate by kaolinitic and montmorillonitic clays10.2136/sssaj1943.036159950007000C0020x ↗
13. Studies on Mg/Fe Hydrotalcite-Like-Compound (HTlc): I. Removal of inorganic selenite (SeO32−) from aqueous medium10.1006/jcis.2002.8319 ↗
14. Adsorption of phosphate by layered double hydroxides in aqueous solutions10.1016/j.clay.2006.02.005 ↗
15. Studies on Mg/Fe hydrotalcite-like-compound (HTlc): removal of Chromium (VI) from aqueous solution10.1080/0020723042000212627 ↗
16. Preparation, characterization and sorption properties for phosphates of hematite, bentonite and bentonite-hematite systems10.1016/S0001-8686(01)00046-X ↗
17. Phosphate recovery from wastewater using engineered superparamagnetic particles modified with layered double hydroxide ion exchangers10.1016/j.watres.2013.06.039 ↗
18. The effect of iron on the crystalline phases formed upon thermal decomposition of Mg-Al-Fe hydrotalcites10.1039/a804867c ↗
19. A simple technology for arsenic removal from drinking water using hydrotalcite10.1016/j.scitotenv.2006.01.036 ↗
20. Application of layered double hydroxides for removal of oxyanions: a review10.1016/j.watres.2007.10.043 ↗
21. A novel lanthanum-modified bentonite, Phoslock, for phosphate removal from wastewaters10.1016/j.clay.2009.09.009 ↗
22. Structure and the point of zero charge of magnesium aluminium hydroxide10.1039/a706607d ↗
23. High adsorption selectivity of ZnAl layered double hydroxides and the calcined materials toward phosphate10.1016/j.jcis.2009.11.004 ↗
24. Crystal chemistry and atomic order in brucite-related double-layer structures10.1080/08893119208032964 ↗
25. Occurrence of sepiolite in Croatia and its application in phosphate removal from wastewater10.1016/j.clay.2012.02.019 ↗
26. The rapid synthesis of the heteropolyoxometalate-pillared layered double hydroxide Zn2Al(OH)6[SiW11O39Co(H2O)]1/6 · 4H2O by the action of ultrasound10.1023/A:1018439802661 ↗
27. Synthesis and application of LDH intercalated cellulose nanocomposite for separation of rare earth elements (REEs)10.1016/j.cej.2016.10.028 ↗
28. Application of zinc-aluminium layered double hydroxides for adsorptive removal of phosphate and sulfate: Equilibrium, kinetic and thermodynamic
29. On the role of ultrasound and mechanical stirring for iodide adsorption by calcined layered double hydroxides10.1016/j.clay.2014.02.012 ↗
30. Laboratory study of boron removal by Mg/Al double-layered hydroxides10.1021/ie0703639 ↗
31. Kinetics and equilibrium studies on Mg-Al oxide for removal of fluoride in aqueous solution and its use in recycling10.1016/j.jenvman.2015.03.043 ↗
32. Phosphate uptake behavior of ZnAlZr ternary layered double hydroxides through surface precipitation10.1016/j.jcis.2009.09.059 ↗
33. Phosphate removal from aqueous solution using coir-pith activated carbon10.1080/01496395.2010.485604 ↗
34. Phosphate removal and recovery with a synthetic hydrotalcite as an adsorbent10.1016/j.chemosphere.2005.04.015 ↗
35. Removal of chloride ion from aqueous solution by ZnAl-NO3 layered double hydroxides as anion-exchanger10.1016/j.jhazmat.2008.04.114 ↗
36. Layered double hydroxides for phosphorus recovery from acidi fi ed and non-acidi fi ed dewatered sludge10.1016/j.watres.2019.01.004 ↗
37. Bromide ion removal from contaminated water by calcined and uncalcined MgAl-CO3 layered double hydroxides10.1016/j.jhazmat.2007.07.117 ↗
38. Layered double hydroxide ion exchangers on superparamagnetic microparticles for recovery of phosphate from waste water10.1039/C2TA00571A ↗
39. Mooyoung · 2013
40. The mechanism of phosphate adsorption by kaolinite, gibbsite, and pseudoboehmite10.1111/j.1365-2389.1966.tb01469.x ↗
41. Encapsulation of nucleotides and DNA into Mg–Al layered double hydroxide10.1016/j.ijpharm.2010.04.013 ↗
42. Evaluation of phosphate removal capacity of Mg/Al layered double hydroxides from aqueous solutions10.1016/j.fuel.2014.07.010 ↗
43. Synthesis of anionic clay minerals (mixed metal hydroxides, hydrotalcite)10.1016/0167-2738(86)90067-6 ↗
44. Removal of phosphate in aqueous solutions by the aluminum salt slag derived from the scrap aluminum melting process
45. Characterisation of layered double hydroxides and their decomposition products10.1016/S0254-0584(02)00024-X ↗
46. Phosphate adsorption characteristics of soils, slags and zeolite to be used as substrates in constructed wetland systems10.1016/S0043-1354(97)00271-6 ↗
47. Insights into phosphate adsorption behavior on structurally modified ZnAl layered double hydroxides10.1016/j.clay.2018.08.018 ↗
48. Phosphate removal from aqueous solutions by adsorption using ferric sludge10.1016/j.desal.2011.07.028 ↗
49. Adsorption of phosphate using calcined Mg3-Fe layered double hydroxides in a fixed-bed column study10.1016/j.jiec.2013.12.057 ↗
50. Studies on selective adsorbents for oxo-anions. Nitrate ion-exchange properties of layered double hydroxides with different metal atoms10.1039/b314938m ↗
51. Enhanced adsorption removal of phosphate from water by mixed lanthanum/aluminum pillared montmorillonite10.1016/j.cej.2009.02.006 ↗
52. Phosphorus removal by acid mine drainage sludge from secondary effluents of municipal wastewater treatment plants10.1016/j.watres.2008.04.005 ↗
53. Theoretical study of the hexahydrated metal cations for the understanding of their template effects in the construction of layered double hydroxides10.1016/j.theochem.2008.06.031 ↗
54. Phosphorus recovery through adsorption by layered double hydroxide nano-composites and transfer into a struvite-like fertilizer10.1016/j.watres.2018.09.005 ↗
55. Adsorptive removal of phosphate by Mg-Al and Zn-Al layered double hydroxides: Kinetics, isotherms and mechanisms10.1016/j.seppur.2013.12.042 ↗
56. Simultaneous removal of ammonium and phosphate from eutrophic waters using natural calcium-rich attapulgite-based versatile adsorbent10.1016/j.desal.2014.07.029 ↗
57. Highly selective adsorption of phosphate by pyromellitic acid intercalated ZnAl-LDHs: Assembling hydrogen bond acceptor sites10.1016/j.cej.2014.09.059 ↗
58. Adsorptive removal of phosphate from aqueous solutions using iron oxide tailings10.1016/j.watres.2003.12.009 ↗