Adsorption characteristics of Cu(II) and Zn(II) by nano-alumina material synthesized by the sol-gel method in batch mode.
Environ Sci Pollut Res Int
; 26(2): 1595-1605, 2019 Jan.
Article
em En
| MEDLINE
| ID: mdl-30446911
ABSTRACT
This study mainly focuses on the preparation, characterization, and sorption performance for Cu(II) and Zn(II) by using nano-alumina material (NA) synthesized through the sol-gel method. The SEM, EDS, FT-IR, and XRD analysis methods were implemented to identify the micromorphology and crystal structure of the synthesized NA absorbent and its structure after the adsorbing procedure. The effect of effective variables including various absorbent dose, contact time, initial ion concentration, and temperature on the removal of Cu(II) and Zn(II) from aqueous solution by using NA was investigated through a single factor experiment. Kinetic studies indicated that adsorption of copper and zinc ions by NA was chemical adsorption. The adsorption isotherm data were fitted by Langmuir (R2 0.919, 0.914), Freundlich (R2 0.983, 0.993), and Temkin (R2 0.876, 0.863) isotherms, indicating that copper and zinc ions were easily adsorbed by NA with maximum adsorption capacities of 87.7 and 77.5 mg/g for Cu2+ and Zn2+, respectively. Thermodynamic parameters indicated that the adsorption of Cu2+ was spontaneous(G<0) and the adsorption of Zn2+ might not be spontaneous (G > 0) by NA. Graphical abstract á
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Zinco
/
Cobre
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Nanoestruturas
/
Óxido de Alumínio
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article