Recovery of uranium ions from simulated seawater with palygorskite/amidoxime polyacrylonitrile composite
Source abstract
Abstract
Abstract A polyacrylonitrile/palygorskite composite chemically modified with amidoxime groups was prepared by free-radical graft polymerization of acrylonitrile onto 3-glycidyloxypropyl trimethoxy silane (KH-560)-modified palygorskite and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Adsorption of uranium(VI) from simulated seawater on the material was investigated. Batch experiments were carried out to study the effects of initial pH, contact time, initial feed concentration and ionic strength on uranium removal. The solution pH values had a major impact on uranium(VI) adsorption with optimal adsorption observed around pH 5. The kinetic data followed the pseudo second-order process. The equilibrium data fitted the Freundlich model well and the maximum adsorption capacity was found to be 78.13 mg/g. The ionic strength did not significantly affect uranium removal and chemisorption was assumed to describe the uranium adsorption. Desorption was performed using 0.1 M HCl solution, and the regenerated adsorbents could be reused with little loss of adsorption capacity after five cycles.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Radioactive element chemistry and processing · Chemical Synthesis and Characterization · Extraction and Separation Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
Show source-provided references
1. Uranium and thorium adsorption from aqueous solution using a novel polyhydroxyethylmethacrylate–pumice composite10.1016/j.jenvrad.2012.11.015 ↗
2. Synthesis and characterization of a functionalized graft copolymer of densified cellulose for the extraction of uranium(VI) from aqueous solutions10.1016/j.colsurfa.2010.03.031 ↗
3. Kinetic and equilibrium characterization of uranium(VI) adsorption onto carboxylate-functionalized poly(hydroxyethylmethacrylate)-grafted lignocellulosics10.1016/j.jenvman.2007.12.010 ↗
4. Removal of uranium(VI) from aqueous solutions and nuclear industry effluents using humic acid-immobilized zirconium-pillared clay10.1016/j.jenvrad.2009.12.001 ↗
5. FTIR and Mössbauer investigation of a substituted palygorskite: silicate with a channel structure10.1016/S0022-3697(97)00166-2 ↗
6. An unusually interlayered clay mineral from the eluvial horizon of a humus–iron podzol10.1180/claymin.1994.029.1.08 ↗
7. Adsorption of acid dye onto organobentonite10.1016/j.jhazmat.2005.07.049 ↗
8. The role of amine structure on catalytic activity for silylation reactions with Cab-O-Sil10.1016/0021-9797(88)90137-3 ↗
9. Development of a functionalized polymer-coated silica for the removal of uranium from groundwater10.1021/es020178g ↗
10. Adsorption study for removal of Congo red anionic dye using organo-attapulgite10.1007/s10450-009-9155-z ↗
11. Removal of Cu(II) from aqueous solution by adsorption onto acid-activated palygorskite10.1016/j.jhazmat.2007.03.085 ↗
12. Adsorption of uranium ions by resins with amidoxime and amidoxime/carboxyl group prepared by radiation-induced polymerization10.1016/S0969-806X(03)00072-0 ↗
13. Fast removal of Hg(II) ions from aqueous solution by amine-modified attapulgite10.1016/j.clay.2013.01.003 ↗
14. Chemical aspects of uranium recovery from seawater by amidoximated electron-beam-grafted polypropylene membranes10.1016/j.desal.2007.09.019 ↗
15. Exchanges of uranium(VI) species in amidoxime-functionalized sorbents10.1021/jp8097928 ↗
16. The removal of uranium (VI) from aqueous solutions onto natural sepiolite10.1016/j.jct.2009.01.009 ↗
17. Advanced materials and new applications of sepiolite and palygorskite
18. Rapid removal of uranium from aqueous solutions using magnetic Fe3O4@SiO2 composite particles10.1016/j.jenvrad.2011.11.003 ↗
19. Properties and applications of palygorskite–sepiolite clays10.1180/claymin.1996.031.4.01 ↗
20. Studies in adsorption. Part III. A system of classification of solution and adsorption isotherm, and its use in diagnosis of adsorption mechanisms and in measurement of specific surface area in solution10.1039/jr9600003973 ↗
21. Inconsistency in the triple layer model description of ionic strength dependent boron adsorption10.1016/j.jcis.2004.12.002 ↗
22. Pseudo-second order model for sorption processes10.1016/S0032-9592(98)00112-5 ↗
23. Adsorption studies of a water soluble dye, reactive red MF-3B, using sonication-surfactant-modified attapulgite clay10.1016/j.jhazmat.2006.09.088 ↗
24. Selective adsorption of tannin from flavonoids by organically modified attapulgite clay10.1016/j.jhazmat.2008.03.008 ↗
25. Adsorption of uranium from aqueous solution by PAMAM dendron functionalized styrene divinylbenzene10.1016/j.jhazmat.2013.01.040 ↗
26. Measurement and modeling of Th sorption onto TiO210.1006/jcis.1999.6535 ↗
27. Intensively competitive adsorption for heavy metal ions by PAMAM–SBA-15 and EDTA–PAMAM–SBA-15 inorganic–organic hybrid materials10.1016/j.micromeso.2007.02.024 ↗
28. Synthesis of novel inorganic–organic hybrid materials for simultaneous adsorption of metal ions and organic molecules in aqueous solution10.1016/j.jhazmat.2011.10.040 ↗
29. Preparation of novel nano-adsorbent based on organic–inorganic hybrid and their adsorption for heavy metals and organic pollutants presented in water environment10.1016/j.jhazmat.2010.12.057 ↗
30. About the theory of so-called adsorption of soluble substances
31. Adsorption properties of hyperbranched aliphatic polyester. grafted attapulgite towards heavy metal ions10.1016/j.jhazmat.2007.03.048 ↗
32. Ionic strength effects on cation sorption to oxides: macroscopic observations and their significance in microscopic interpretation10.1006/jcis.1997.5160 ↗
33. A critique of diffuse double layer models applied to colloid and surface chemistry10.1346/CCMN.1997.0450412 ↗
34. The removal of uranium(VI) from aqueous solutions onto activated carbon: kinetic and thermodynamic investigations10.1016/j.jcis.2005.09.045 ↗
35. Preparation and characterization of terbium palygorskite clay as acid catalyst10.1016/S1387-1811(00)00155-4 ↗
36. An introduction to palygorskite and sepiolite deposits — location, geology and uses
37. Effect of pH, ionic strength and humic acid on the sorption of uranium(VI) to attapulgite10.1016/j.apradiso.2009.03.113 ↗
38. Retention behaviour of humic substances onto mineral surfaces and consequences upon thorium (IV) mobility: case of iron oxides10.1016/S0883-2927(02)00045-8 ↗
39. Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium10.1016/j.jcis.2012.07.070 ↗
40. Adsorption of surfactants, dyes and cationic herbicides on sepiolite and palygorskite: modifications, applications and modelling
41. Fast removal of copper ions from aqueous solution by chitosan-g-poly(acrylic acid)/attapulgite composites10.1016/j.jhazmat.2009.02.120 ↗
42. Adsorptive removal of humic acid from aqueous solution on polyaniline/attapulgite composite10.1016/j.cej.2011.07.065 ↗
43. Amidoximation of the acrylonitrile polymer grafted on poly(tetrafluoroethylene-co-hexafluoropropylene) films and its relevance to the electroless plating of copper10.1021/la020497l ↗
44. The adsorption mechanism of uranium(VI) from seawater on a macroporous fibrous polymeric adsorbent containing amidoxime chelating functional group10.1016/j.reactfunctpolym.2003.07.005 ↗
45. pH effect on the uranium adsorption from seawater by a macroporous fibrous polymeric material containing amidoxime chelating functional group10.1016/j.reactfunctpolym.2005.02.015 ↗
46. Adsorption of thorium(IV) on MX-80 bentonite: effect of pH, ionic strength and temperature10.1016/j.clay.2007.09.012 ↗
47. Adsorption of Hg2+ from aqueous solution onto polyacrylamide/attapulgite10.1016/j.jhazmat.2009.06.048 ↗
48. Effect of pH, ionic strength and humic substances on the adsorption of uranium(VI) onto Na-rectorite10.1007/s10967-010-0846-4 ↗