Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO2 Hollow-Fiber Membrane - Université de Montpellier
Article Dans Une Revue Membranes Année : 2022

Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO2 Hollow-Fiber Membrane

Emma Roubaud
  • Fonction : Auteur
  • PersonId : 1272418
  • IdRef : 233077367
Olivier Lorain
  • Fonction : Auteur
Lina Lamaa
  • Fonction : Auteur
Julie Mendret
Jean-Pierre Mericq
Stephan Brosillon
Catherine Faur
Christel Causserand

Résumé

In the context of designing a photocatalytic self-cleaning/low-fouling membrane, the stability of PVDF-PVP-TiO2 hollow-fiber membranes under UV irradiation has been studied. The effect of irradiation power, aqueous environment composition and fouling state on the properties of the membranes has been investigated. With this aim, SEM observations, chemical analysis and tensile strength measurements have been conducted. The results indicate that pristine membranes that undergo UV irradiation in ultra-pure water are significantly degraded due to attacks of OH° radicals. However, when methylene blue, used as a model pollutant, is introduced in the aqueous environment, OH° radicals preferentially react with this molecule rather than the membranes, successfully preserving the original properties of the latter. The presence of an adsorbed BSA layer (pre-fouling by immersion) on the surface of the membrane delays membrane aging, as the BSA layer is degraded by radicals instead of the membrane material. The degradation of the BSA layer also validates the self-cleaning properties of the membrane. However, when membranes are pre-fouled by filtration of a 2 g/L BSA solution, delay to aging is less. This is because OH° radicals do not reach BSA molecules that are trapped inside the membrane pores, and therefore react with the membrane material.
Fichier principal
Vignette du fichier
Roubaud_2022.pdf (3.55 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-03845105 , version 1 (01-06-2023)

Licence

Identifiants

Citer

Emma Roubaud, William Maréchal, Olivier Lorain, Lina Lamaa, Laure Peruchon, et al.. Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO2 Hollow-Fiber Membrane. Membranes, 2022, 12 (5), pp.538. ⟨10.3390/membranes12050538⟩. ⟨hal-03845105⟩
42 Consultations
11 Téléchargements

Altmetric

Partager

More