RT Journal Article
T1 Cu or Fe-Exchanged Natural Clinoptilolite as Sustainable Light-Assisted Catalyst for Water Disinfection at Near Neutral pH
A1 Prieto Laria, Paula
A1 Fernández-Ibáñez, Pilar
A1 Ruiz-Salvador, A. Rabdel
A1 Canosa Pérez-Fragero, Inés
A1 Flores, Amando
A1 Salameh, Carlos
A1 Domínguez-Santos, José Enrique
A1 Ofelia Núñez, Nuria
A1 Ballesteros, María de la Menta
A1 Farías, Tania
K1 Natural zeolite
K1 Iron and copper exchange
K1 Heterogeneous photo-Fenton
K1 Visible light
K1 E. coli
AB Natural zeolites can be used to obtain effective catalysts for heterogeneous photocatalytic reactions due to their low cost and favorable physicochemical properties for water treatment. In this work, a natural clinoptilolite is modified by incorporating iron (NZ–Fe) and copper (NZ–Cu) as compensation cations through ion exchange processes. Metals incorporation and structural stability are demonstrated through X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. DR-UV–Vis measurements are used to estimate the bandgap and predict the photocatalytic performance of both materials. Their effectiviness in heterogeneous photocatalytic systems is confirmed by evaluating the inactivation of E. coli as a model pathogen in water. The bacterial detection limit (initial ≈106 CFU/mL) is reached using 1 gL−1 of both catalysts, 100 ppm of H2O2 under visible light (410–710 nm) and near neutral pH in 2 h, with no post-treatment regrowth observed. Experimental data are analyzed according to the Chick–Watson, Weibull, and Hom disinfection kinetic models. Although more hydroxyl radicals are generated (trapping tests) and less iron leachate is observed for NZ–Fe, good reusability is attained for three disinfection cycles when NZ–Cu is used. This makes copper-exchanged clinoptilolite a suitable and low-cost photocatalyst for water disinfection through heterogeneous photo-Fenton-type processes.
PB Chemistry Europe
YR 2025
FD 2025-09-18
LK https://hdl.handle.net/10433/24741
UL https://hdl.handle.net/10433/24741
LA en
NO Paula Prieto-Laria, Pilar Fernández-Ibáñez, A. Rabdel Ruiz-Salvador, Inés Canosa, Amando Flores, Carlos Salameh, José Enrique Domínguez-Santos, Nuria Ofelia Núñez, Menta Ballesteros, Tania Farías, ChemPlusChem 2025, 0, e202500225. https://doi.org/10.1002/cplu.202500225
NO Departamento de Biología Molecular e Ingeniería Bioquímica
DS RIO
RD May 6, 2026