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Prevention of PVDF ultrafiltration membrane fouling by coating MnO2 nanoparticles with ozonation

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Title: Prevention of PVDF ultrafiltration membrane fouling by coating MnO2 nanoparticles with ozonation
Authors: Brown, M
Graham, NJD
Item Type: Journal Article
Abstract: Pre-treatment is normally required to reduce or control the fouling of ultrafiltration (UF) membranes in drinking water treatment process. Current pre-treatment methods, such as coagulation, are only partially effective to prevent long-term fouling. Since biological activities are a major contributor to accumulated fouling, the application of an oxidation/disinfection step can be an effective complement to coagulation. In this study, a novel pre-treatment method has been evaluated at laboratory scale consisting of the addition of low dose ozone into the UF membrane tank after coagulation and the use of a hollow-fibre membrane coated with/without MnO2 nanoparticles over a test period of 70 days. The results showed that there was minimal fouling of the MnO2 coated membrane (0.5 kPa for 70 days), while the uncoated membrane experienced both reversible and irreversible fouling. The difference was attributed to the greatly reduced presence of bacteria and organic matter because of the catalytic decomposition of ozone to hydroxyl radicals and increase of the hydrophilicity of the membrane surface. In particular, the MnO2 coated membrane had a much thinner cake layer, with significantly less polysaccharides and proteins, and much less accumulated organic matter within the membrane pores.
Issue Date: 20-Jul-2016
Date of Acceptance: 28-Jun-2016
URI: http://hdl.handle.net/10044/1/34298
DOI: http://dx.doi.org/10.1038/srep30144
ISSN: 2045-2322
Publisher: Nature Publishing Group
Journal / Book Title: Scientific Reports
Volume: 6
Copyright Statement: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: PIIF-GA-2012-328867
Publication Status: Published
Article Number: 30144
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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