Effects of molar ratio and calcination temperature on the adsorption performance of Zn/Al layered double hydroxide nanoparticles in the removal of pharmaceutical pollutants
Source abstract
Abstract
This work focuses on the development of zinc/aluminum layered double hydroxides (LDHs) phases intercalated by carbonates ions (Zn-Al-CO3) and their use in the removal of pharmaceutical pollutants. The materials were synthesized by the co-precipitation method at different Zn/Al molar ratios (r = 1, 3 and 5). Each synthesized material was calcined at 300, 400, 500 and 600 °C to increase their performance. Samples were characterized by various physicochemical techniques including XRD, FTIR, ICP-AES and TEM-EDX. The as-synthesized and calcined products were used for the removal of salicylic acid (SA) as a model of pharmaceutical pollutants. The results obtained show that the Zn/Al molar ratios and calcination temperatures have a great influence on the adsorption capacity. The optimum adsorption efficiency was found to be 94.59% for Zn/Al molar ratio of 3 and a calcination temperature of 300 °C. Kinetics of the adsorption takes place in two steps; the first fast rapid step can be interpreted by the adsorption on the external surface of the crystallites, while the second slow step could be due the reconstruction phenomenon of LDHs structure “memory effect”. After the adsorption processes, XRD patterns show that the calcined product (r = 3, T = 300 °C) was reconstructed by a salicylic acid. The adsorption performance was slightly decreased with regeneration cycles.
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Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Magnesium Oxide Properties and Applications · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Template free synthesis, characterization and application of nano ZnO rods for the photocatalytic decolourization of methyl orange10.1016/j.jwpe.2016.05.011 ↗
2. Simultaneous removal of phenol and cyanide from aqueous solution by adsorption onto surface modified activated carbon prepared from coconut shell10.1016/j.jwpe.2016.01.008 ↗
3. Kinetics of photocatalytic degradation of gaseous organic compounds on modified TiO2/AC composite photocatalyst10.1016/S1004-9541(11)60221-8 ↗
4. Pharmaceuticals and personal care products (PPCPs) in surface and treated waters of Louisiana, USA and Ontario, Canada10.1016/S0048-9697(03)00138-4 ↗
5. Pharmaceuticals and personal care products in the environment: overarching issues and overview10.1021/bk-2001-0791.ch001 ↗
6. Presence of pharmaceuticals and personal care products in the environment-a concern for human health?10.1021/bk-2010-1048.ch017 ↗
7. Remediation of water pollution caused by pharmaceutical residues based on electrochemical separation and degradation technologies: a review10.1016/j.envint.2011.07.012 ↗
8. Toxicological relevance of pharmaceuticals in drinking water10.1021/es1004895 ↗
9. Comparative study of the adsorption of phenol and salicylic acid from aqueous solution onto nonionic polymeric resins10.1016/j.seppur.2005.02.011 ↗
10. Enhanced adsorption of salicylic acid onto a bnaphthol modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin from aqueous solution10.1016/j.cej.2011.01.065 ↗
11. A novel post-crosslinked polystyrene/polyacryl diethylenetriamine (PST_pc/PADETA) interpenetrating polymer networks (IPNs) and its adsorption towards salicylic acid from aqueous solutions10.1016/j.cej.2014.03.061 ↗
12. Kinetic study on the photocatalytic degradation of salicylic acid using ZnO catalyst10.1016/j.jhazmat.2008.12.051 ↗
13. Synthesis, characterization and adsorption properties of diethylenetriamine-modified hypercrosslinked resins for efficient removal of salicylic acid from aqueous solution10.1016/j.jhazmat.2012.03.053 ↗
14. Aerobic degradation of aromatic compounds10.1016/j.copbio.2012.10.010 ↗
15. Revolution from monometallic to trimetallic nanoparticle composites, various synthesis methods and their applications: a review10.1016/j.msec.2016.11.002 ↗
16. Microwave assisted fabrication of La/Cu/Zr/carbon dots trimetallic nanocomposites with their adsorptional vs photocatalytic efficiency for remediation of persistent organic pollutants10.1016/j.jphotochem.2017.07.001 ↗
17. Membrane processes for removal of pharmaceutically active compounds (PhACs) from water and wastewaters10.1016/j.scitotenv.2015.12.139 ↗
18. Performance of Zn-, Mg-and Ni-Al layered double hydroxides in treating an industrial textile wastewater
19. Photoremediation of toxic dye from aqueous environment using monometallic and bimetallic quantum dots based nanocomposites10.1016/j.jclepro.2017.11.122 ↗
20. Photocatalytic degradation of highly toxic dyes using chitosan-g-poly(acrylamide)/ZnS in presence10.1016/j.jphotochem.2016.06.019 ↗
21. Facile hetero-assembly of superparamagnetic Fe3O4/BiVO4 stacked on biochar for solar photo-degradation of methyl paraben and pesticide removal from soil10.1016/j.jphotochem.2017.01.010 ↗
22. Photocatalytic degradation of caffeine by ZnO-ZnAl2O4 nanoparticles derived from LDH structure
23. A comparative adsorption for the removal of p-cresol from aqueous solution onto granular activated charcoal and granular activated alumina
24. Anion-exchange properties of hydrotalcite-like compounds10.1346/CCMN.1983.0310409 ↗
25. Layered double hydroxides
26. Hydrotalcite-type anionic clays: preparation, properties and applications10.1016/0920-5861(91)80068-K ↗
27. Mn-doped Zn/Al layered double hydroxides as photocatalysts for the 4-chlorophenol photodegradation10.1016/j.clay.2015.08.030 ↗
28. Zn, Al hydrotalcites calcined at different temperatures: preparation, characterization and photocatalytic activity in gas–solid regime10.1016/j.molcata.2011.04.015 ↗
29. Synthesis and characterization of a Fe(III)-Schiff base complex in a Zn-Al LDH host for cyclohexane oxidation10.1016/j.molcata.2010.06.010 ↗
30. Surface charging of layered double hydroxides during dynamic interactions of anions at the interfaces10.1016/j.jcis.2008.06.062 ↗
31. On the synthesis of layered double hydroxides (LDHs) by reconstruction method based on the “memory effect”10.1016/j.micromeso.2015.03.024 ↗
32. Intercalation of drugs in layered double hydroxides and their controlled release: a review10.1016/j.clay.2013.12.002 ↗
33. Over the adsorption in solution
34. On the structure of a catalyst surface10.1063/1.1746922 ↗
35. Modified Na montmorillonite with quaternary ammonium salts: application for removal of salicylic acid from aqueous solutions10.1002/clen.201400051 ↗
36. Preparation of calcined zirconia-carbon composite from metal organic frameworks and its application to adsorption of crystal violet and salicylic acid10.3390/ma9040261 ↗
37. Utilization of banana peel for the removal of benzoic and salicylic acid from aqueous solutions and its potential reuse
38. Application of layered double hydroxides for removal of oxyanions: a review10.1016/j.watres.2007.10.043 ↗