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Investigation of the adsorption mechanisms of Pb(II) and 1-naphthol by β-cyclodextrin modified graphene oxide nanosheets from aqueous solution.
- Source :
-
Journal of Colloid & Interface Science . Nov2018, Vol. 530, p154-162. 9p. - Publication Year :
- 2018
-
Abstract
- β-cyclodextrin decorated graphene oxides (β-CD-GO) was prepared by using an in - situ aggregation treatment, and used to remove inorganic (Pb(II)) and organic pollutants (1-naphthol) from water environment. The batch adsorption experiments of as-prepared β-CD-GO were carried out as a function of pH values, initial Pb(II) and 1-naphthol concentration, ionic strength, contact time and temperature. β-CD-GO kinetic results indicated that the adsorption was dominated by chemisorptions and followed a pseudo-second order model. The maximum adsorption capacities of β-CD-GO toward Pb(II) and 1-naphtholon the base of the Langmuir model were 149.56 and 207.6 mg·g −1 at 293 K, respectively. The thermodynamic experiments revealed that the adsorption of Pb(II) and 1-naphthol was spontaneous and endothermic. The surface compexation, hydrogen bonds and π-π interactions contributed to Pb(II) and 1-naphthol adsorption by means of the hydroxy and carboxyl functional groups on the surface of the β-CD-GO. The experimental results indicate that the β-CD-GO is an excellent composite for the elimination of Pb(II) and 1-naphthol from wastewater. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 530
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 131236079
- Full Text :
- https://doi.org/10.1016/j.jcis.2018.06.083