Role of electrostatic interactions in the adsorption of cadmium(II) from aqueous solution onto vermiculite
Source abstract
Abstract
Abstract The adsorption equilibrium data of Cd(II) on vermiculite was obtained in a batch adsorber. The adsorption data were interpreted with the Langmuir, Freundlich and Prausnitz–Radke (PR) isotherm models, and the PR isotherm best fitted the experimental data. The adsorption capacity of vermiculite towards Cd(II) was increased by raising the solution pH and temperature. The first effect was attributed to electrostatic interactions and competition between the protons and Cd(II) for the cationic sites. The second trend indicated that the adsorption was endothermic. The desorption of Cd(II) adsorbed on vermiculite at pH = 7, was irreversible and reversible when the pH of desorption solution was 7 and 3, respectively. The maximum uptake of Cd(II) on vermiculite was greater than the cationic exchange capacity. This result revealed that the adsorption of Cd(II) on vermiculite occurred by other adsorption mechanisms besides ion exchange. It was demonstrated that the greater the uptake of Cd(II) on vermiculite, the higher the reduction of the negative charge of the surface. Hence, the electrostatic interactions between the Cd 2 + cations in solution and the negative zeta potential of the surface played an important role on the adsorption capacity of vermiculite. Hence, the adsorption of Cd(II) on vermiculite is mainly due to the mechanisms of ion exchange and electrostatic attraction.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Clay minerals and soil interactions · Extraction and Separation Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (49)
Show source-provided references
1. Adsorption of atrazine, hydroxyatrazine, deethylatrazine, and deisopropylatrazine onto Fe(III) polyhydroxy cations intercalated vermiculite and montmorillonite10.1021/jf048556j ↗
2. Removal of fulvic acid from aqueous media by adsorption onto modified vermiculite10.1016/j.clay.2006.02.004 ↗
3. Interaction of metal ions with montmorillonite and vermiculite10.1016/j.clay.2007.04.002 ↗
4. Removal of heavy metals from waste waters by natural and Na-exchanged bentonites10.1346/CCMN.2003.0510501 ↗
5. Chemical and physical characterization of iron-intercalated vermiculite compounds10.1007/s00269-011-0429-0 ↗
6. Vermiculite as an exchanger for copper(II) and Cr(III) ions, kinetic studies10.1007/s11581-010-0456-8 ↗
7. Cation and anion exchange
8. Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: a review10.1016/j.cis.2007.12.008 ↗
9. Comparison of natural adsorbents for metal removal from acidic effluent10.1080/09593330309385552 ↗
10. Mercury adsorption by montmorillonite and vermiculite: a combined XRD, TG–MS, and EXAFS study10.1016/j.clay.2004.03.006 ↗
11. A comparative study of the removal of trivalent chromium from aqueous solution by bentonite and expanded perlite10.1016/S0304-3894(01)00382-X ↗
12. Charge reduction in a vermiculite by acid and hydrothermal methods: a comparative study10.1021/jp044437v ↗
13. Natural vermiculite as an exchanger support for heavy cations in aqueous solution10.1016/j.jcis.2004.11.031 ↗
14. Removal of cadmium, zinc, manganese and chromium cations from aqueous solution by a clay mineral10.1016/j.jhazmat.2006.02.001 ↗
15. Removal of lead by vermiculite medium10.1016/0169-1317(91)90027-7 ↗
16. Electrokinetic properties of vermiculite and expanded vermiculite: effects of pH, clay concentration and mono- and multivalent electrolytes10.1080/01496390802219109 ↗
17. Water remediation by adsorption of phenol onto hydrophobic modified clay10.1007/s11270-008-9863-0 ↗
18. Froment · 1990
19. Removal of heavy metal ions from wastewaters: a review10.1016/j.jenvman.2010.11.011 ↗
20. García · 2001
21. Surface speciation of Cd(II) and Pb(II) on kaolinite by XAFS spectroscopy10.1016/j.jcis.2007.05.022 ↗
22. Modelling the adsorption of Cd(II), Cu(II), Ni(II), Pb(II), and Zn(II) onto Fithian illite10.1016/j.jcis.2006.11.022 ↗
23. Modeling of cadmium(II) adsorption on kaolinite-based clays in the absence and presence of humic acid10.1016/j.clay.2006.02.002 ↗
24. Ion exchange and adsorption equilibrium studies on clinoptilolite, bentonite and vermiculite10.1016/j.jpcs.2009.12.077 ↗
25. Adsorption behaviour of Cu2+ and Cd2+ onto natural bentonite10.1016/j.desal.2008.12.046 ↗
26. The trapping of B from water by exfoliated and functionalized vermiculite10.1346/CCMN.2008.0560406 ↗
27. Modeling the adsorption of Cd(II) onto Muloorina illite and related clay minerals10.1016/S0021-9797(02)00031-0 ↗
28. Effect of temperature and pH on the adsorption of an anionic detergent on activated carbon10.1002/jctb.280450308 ↗
29. Adsorption of Cadmium(II) from aqueous solution onto activated carbon10.1016/S0273-1223(97)00132-7 ↗
30. Kinetics and thermodynamics of Lead(II) adsorption on vermiculite10.1080/01496390600998045 ↗
31. Adsorption of heavy metals on vermiculite: influence of pH and organic ligands10.1016/j.jcis.2006.03.011 ↗
32. Adsorption of cadmium from aqueous solutions by vermiculite10.1081/SS-120016698 ↗
33. Meunier · 2005 · 207
34. Quantitative determination clinoptilolite in soils by a cation exchange capacity method10.1346/CCMN.1987.0350607 ↗
35. Stabilization of Cr(VI) from fine ferrochrome dust using exfoliated vermiculite10.1016/j.jhazmat.2012.04.046 ↗
36. The mineral phase quantification of vermiculite and interstratified clay minerals-containing ores by X-ray diffraction and Rietveld method after K cation exchange10.1016/j.mineng.2011.05.017 ↗
37. Adsorptive removal of Cd(II) and Pb(II) ions from aqueous solutions by using Turkish illitic clay10.1016/j.jenvman.2011.07.022 ↗
38. Adsorption of heavy metal ions from aqueous solution onto sepiolite
39. Binary adsorption of heavy metals from aqueous solution onto natural clays10.1016/j.cej.2013.04.011 ↗
40. Cadmium adsorption on vermiculite, zeolite and pumice: batch experimental studies10.1016/j.jenvman.2007.10.005 ↗
41. Heavy metals removal from solution by palygorskite clay10.1016/j.mineng.2005.07.004 ↗
42. Comparison of rapid methods for chemical analyses of milligram samples of ultrafine clays10.1346/CCMN.1983.0310605 ↗
43. Adsorption by Powders and Porous Solids
44. Evaluating the adsorptive capacity of montmorillonitic and calcareous clays on the removal of several heavy metals in aqueous systems10.1016/j.cej.2011.05.015 ↗
45. Removal of Cu(II) in fixed bed and batch reactors using natural zeolite and exfoliated vermiculite as adsorbents10.1016/j.desal.2006.10.031 ↗
46. The effect of different plasma gas environments on vermiculite layer10.1016/j.clay.2006.05.007 ↗
47. EXAFS analysis of cadmium(II) adsorption to kaolinite10.1016/j.chemgeo.2008.01.001 ↗
48. Evaluating the removal of Cd(II), Pb(II) and Cu(II) from a wastewater sample of a coating industry by adsorption onto vermiculite10.1016/j.clay.2006.12.009 ↗
49. Factors affecting the adsorption of Zn2+ and Cd2+ ions from aqueous solution onto vermiculite