In this work, polyvinylidene fluoride (PVDF) intercalated CuFe layered double hydroxides (LDH) membranes were fabricated and investigated for UV-LED/persulfate degradation of methylene blue (MB), crystal violet (CV), methyl orange (MO), and Eriochrome black T (EBT) dyes from water. The PVDF-CuFe membrane exhibited improved heterogeneity, surface functionality (CuO, Fe-O, Cu-O-Fe), surface roughness, and hydrophilicity. The process parameters were optimized by response surface methodology, and maximum MB removal (100%) was achieved within 45.22-178.5 min at MB concentration (29.45-101.93 mg/L), PP concentration (0.5-2.41 g/L) and catalyst dosage (1.84-1.95 g/L). The degradation kinetics was well described by a pseudo-first-order model (R2 = 0.982) and fast reaction rate (0.029-0.089/min). The MB dye degradation mechanism is associated with HO·/SO4•- reactive species generated by Fe3+/Fe2+ or Cu2+/Cu+ in PVDF-CuFe membrane and PP dissociation. The PVDF-CuFe membrane demonstrated excellent recyclability performance with a 12% reduction after five consecutive cycles. The catalytic membrane showed excellent photocatalytic degradation of crystal violet (100%), methyl orange (79%), and Eriochrome black T (60%). The results showed that UV-LED/persulfate-assisted PVDF-CuFe membranes can be used as a recyclable catalyst for the effective degradation of dye-contaminated water streams.

Bioenergy Research Unit Department of Biophysics Institute for Research and Medical Consultations Imam Abdulrahman Bin Faisal University 1982 PO Box 1982 Dammam 31441 Saudi Arabia

Center for Advanced Materials Qatar University P O Box 2713 Doha Qatar

Centre of Polymer Systems University Institute Tomas Bata University in Zlín Třída Tomáše Bati 5678 76001 Zlín Czech Republic

Department of Civil and Architectural Engineering College of Engineering Qatar University PO Box 2713 Doha Qatar

Department of Environmental Engineering College of Engineering Imam Abdulrahman Bin Faisal University P O Box 1982 Dammam 31451 Saudi Arabia

Interdisciplinary Research Center for Membranes and Water Security King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia

Citace poskytuje Crossref.org