Composite crosslinked chitosan beads with zeolitic imidazolate framework-67 as peroxymonosulfate activator for increased dye degradation
10
Issued Date
2023-06-01
Resource Type
eISSN
22133437
Scopus ID
2-s2.0-85153374812
Journal Title
Journal of Environmental Chemical Engineering
Volume
11
Issue
3
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Environmental Chemical Engineering Vol.11 No.3 (2023)
Suggested Citation
Panawong C., Phonlakan K., Nijpanich S., Pornsuwan S., Budsombat S. Composite crosslinked chitosan beads with zeolitic imidazolate framework-67 as peroxymonosulfate activator for increased dye degradation. Journal of Environmental Chemical Engineering Vol.11 No.3 (2023). doi:10.1016/j.jece.2023.109909 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/81316
Title
Composite crosslinked chitosan beads with zeolitic imidazolate framework-67 as peroxymonosulfate activator for increased dye degradation
Other Contributor(s)
Abstract
In this study, a biodegradable cobalt-based peroxymonosulfate (PMS) activator for a dye degradation process was fabricated from crosslinked chitosan (CS) and zeolitic imidazolate framework-67 (ZIF-67) beads. Green synthesis of ZIF-67 produced a good yield, and its particles had an average size of 242 nm and a specific surface area of 1129 m2/g. These particles were then incorporated with the crosslinked CS beads at different loadings (2.5–10 %). The catalytic performance of these composite beads was evaluated for rhodamine B (RhB) degradation. Maximum degradation of 98 % was achieved with CS/7.5 %ZIF-67 and a PMS concentration of 0.15 g/L. The degradation equilibrium was obtained within 5 min, with a degradation rate of 0.957 min−1. The pH of the solution had no significant effect on the degradation extent. The predominant radical species in RhB degradation were sulfate radical anions, and a high concentration of coexisting anions decreased the degradation efficiency. The composite beads effectively degraded RhB over five cycles without any chemical recovery treatments. Furthermore, the PMS activating-composite beads effectively facilitated the degradation of various other dyes. This approach is a simple, practical, and cost-effective method for preparing a PMS activator that can efficiently increase dye degradation with ease of separation and recovery.