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Superadsorbent hydrogel based on lignin and montmorillonite for Cu(II) ions removal from aqueous solution.
- Source :
-
International Journal of Biological Macromolecules . Apr2019, Vol. 127, p511-519. 9p. - Publication Year :
- 2019
-
Abstract
- Abstract Superadsorbent hydrogel was prepared from lignin and montmorillonite for Cu(II) ions removal, and the chemical structure and morphology of the hydrogel were characterized by FT-IR, XRD, SEM and XPS. The swelling kinetics of the prepared hydrogel was investigated, and the result showed that the swelling process fit the Schott second-order dynamic equation. The influences of pH, contact time, Na+ concentration, and initial Cu(II) ion concentration on adsorption were studied, and the maximum adsorption value was 1.17 mmol/g, and the adsorption was rapid during the initial 5 h period, and copper ions adsorption on the superadsorbent hydrogel is a favorable process. The results also indicated that the adsorption kinetics was in accordance with the pseudo-second-order kinetic model and the adsorption isotherm conformed to the Freundlich model. FT-IR and XPS analysis revealed that the adsorption behavior was mainly due to ion exchange. The desorption ratios of copper ions from the superadsorbent were >0.8, and the regeneration efficiency was >80% after five cycles reuse, and the results show the excellent desorption performance and reusability of the prepared hydrogel. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDROGELS
*LIGNINS
*MONTMORILLONITE
*COPPER ions
*AQUEOUS solutions
Subjects
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 127
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 134927211
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2019.01.058