Cellulose-based aerogel beads for efficient adsorption- reduction- sequestration of Cr(VI).
Int J Biol Macromol
; 216: 860-870, 2022 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-35914552
ABSTRACT
The reduction and sequestration of toxic Cr(VI) via a one-step process in an aqueous solution is critical to eliminate its environmental risk. In this study, amine functionalized cellulose-based aerogel beads (CGP) was developed for simultaneous and efficient adsorption- reduction- sequestration of Cr(VI). CGP showed a maximum Cr(VI) adsorption capacity of 386.40 mg/g at 25 °C due to its strong electrostatic attraction towards Cr(VI). The simultaneous Cr(VI) adsorption- reduction- sequestration performance of CGP over a wide Cr(VI) concentration range was examined. The mechanism was investigated in-depth via the analysis of adsorption kinetics, XPS spectra, and FTIR spectra. Moreover, the Cr immobilization stability of CGP after adsorption was evaluated in simulated neutral, acidic, and alkaline conditions. The effect of pH, temperature, ionic strength and the presence of interfering ions on CGP adsorption performance were investigated by batch adsorption experiments. Fixed-bed column adsorption study was performed to explore the application potential of CGP beads in a wastewater treatment process.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Celulose
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China