Photocatalytically active layered double hydroxide-PVDF composite membranes for effective remediation of dyes contaminated water
Language English Country England, Great Britain Media print-electronic
Document type Journal Article
PubMed
39181459
DOI
10.1016/j.chemosphere.2024.143169
PII: S0045-6535(24)02066-6
Knihovny.cz E-resources
- Keywords
- Dye pollution, Nanoparticles, Photocatalytic membranes: response surface methadology, Photodegradation,
- MeSH
- Azo Compounds * chemistry MeSH
- Coloring Agents * chemistry MeSH
- Water Pollutants, Chemical * chemistry MeSH
- Water Purification methods MeSH
- Fluorocarbon Polymers MeSH
- Gentian Violet chemistry MeSH
- Hydroxides * chemistry MeSH
- Catalysis MeSH
- Kinetics MeSH
- Copper chemistry MeSH
- Methylene Blue * chemistry MeSH
- Polyvinyls * chemistry MeSH
- Environmental Restoration and Remediation methods MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Azo Compounds * MeSH
- Coloring Agents * MeSH
- Water Pollutants, Chemical * MeSH
- Eriochrome Black T MeSH Browser
- Fluorocarbon Polymers MeSH
- Gentian Violet MeSH
- Hydroxides * MeSH
- Copper MeSH
- methyl orange MeSH Browser
- Methylene Blue * MeSH
- polyvinylidene fluoride MeSH Browser
- Polyvinyls * MeSH
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.
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