Fabrication of cationic cellulose nanofibrils/sodium alginate beads for Congo red removal.
Biomaterials
Chemistry
Environmental engineering
Materials chemistry
Materials science
Journal
iScience
ISSN: 2589-0042
Titre abrégé: iScience
Pays: United States
ID NLM: 101724038
Informations de publication
Date de publication:
20 Oct 2023
20 Oct 2023
Historique:
received:
04
05
2023
revised:
16
07
2023
accepted:
28
08
2023
medline:
18
9
2023
pubmed:
18
9
2023
entrez:
18
9
2023
Statut:
epublish
Résumé
Congo red is hard to remove from dye wastewater due to its structure stability and high chemical oxygen demand. In this study, cationic cellulose nanofibrils (CCNF) prepared from herb residues was physically crosslinked with sodium alginate (SA) in the presence of calcium ions, and the obtained CCNF/SA beads were used to adsorb Congo red. Results showed that CCNF/SA beads with porous internal structure were beneficial to adsorption. The maximum adsorption capacity of Congo red could reach to 518.4 mg/g, which was superior to most cellulose-based adsorption materials. Furthermore, the equilibrium adsorption isotherms and XPS analysis indicated the adsorption for Congo red was a physical process, and hydrogen bond and electrostatic adsorption were proposed as dominant adsorption mechanism. In addition, the Congo red removal efficiency of the beads was still higher than 70% after three cycles. Therefore, this high efficiency and green beads have great potential as adsorbents for anionic dyes removal.
Identifiants
pubmed: 37720102
doi: 10.1016/j.isci.2023.107783
pii: S2589-0042(23)01860-6
pmc: PMC10504542
doi:
Types de publication
Journal Article
Langues
eng
Pagination
107783Informations de copyright
© 2023 The Author(s).
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
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