Enhanced Selective Degradation of Pharmaceutical and Personal Care Products by ß-Cyclodextrin-Decorated ZIF-67 Nanocomposites in Reclaimed Water.
ACS Appl Mater Interfaces
; 16(27): 34973-34987, 2024 Jul 10.
Article
em En
| MEDLINE
| ID: mdl-38918892
ABSTRACT
A peroxymonosulfate oxidation system was developed via modification of ß-cyclodextrin (ß-CD) on the surface of Fe2+-doped ZIF-67 (CD/Fe@ZIF-67) as an activator. The 99.7% carbamazepine, 91.3% bisphenol A (BPA), and 95.4% diclofenac (DCF) degradation efficiency were achieved within 10 min, 60, and 1 min, respectively. The hydrophobicity of these three pollutants is positively correlated with their adsorption kinetic constants by CD/Fe@ZIF-67 due to the introduction of ß-CD. Scavenger experiments and electron spin resonance spectra confirmed that carbamazepine was preferentially oxidized by SO4â¢- [λ(SO4â¢-)(70.5%) > λ(â¢OH)(28.2%) > λ(O2â¢-)(1.3%)], where SO4â¢- and O2â¢- played dominant roles in the degradation of BPA [λ(SO4â¢-)(71.7%) > λ(O2â¢-)(22.8%) > λ(â¢OH)(5.5%)], and O2â¢- was responsible for DCF removal [λ(O2â¢-) = 93.2%]. Additionally, the particulate catalyst was immobilized in the shell side of a ceramic membrane in a membrane reactor for catalyst recovery. This reactor achieved nearly 100% removal efficiency under optimal conditions 0.036 wt % catalyst loading, 0.5 mM peroxymonosulfate concentration, 1 L inflow, 10 mg/L initial carbamazepine concentration, and 0.012 L/min hydraulic retention time. In summary, this study elucidates the active role of ß-CD in a polymetallic/peroxymonosulfate system and provides valuable insights into the development of effective oxidation methods for pharmaceutical and personal care products in wastewater.
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MEDLINE
Assunto principal:
Poluentes Químicos da Água
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Carbamazepina
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Beta-Ciclodextrinas
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Nanocompostos
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article