Article (Scientific journals)
Effect of (TiO2: ZnO) ratio on the anti-fouling properties of bio-inspired nanofiltration membranes
Bahamonde Soria, Raúl; Zhu, Junyong; Gonza Quito, Irma Elizabeth et al.
2020In Separation and Purification Technology, 251, p. 117280
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Keywords :
Anti-fouling; Dopamine; Nanofiltration membrane; TiO2 nanoparticles; Uv-photocatalysis; ZnO nanoparticles; Anti-microbial activity; Antifouling property; Membrane performance; Modification methods; Modified membranes; Non-specific interactions; Pristine membranes; Thin-film composite membrane; Analytical Chemistry; Filtration and Separation
Abstract :
[en] Membrane fouling and biofouling, which arises from the nonspecific interaction between the membrane surface and foulants, significantly impedes the efficient application of membrane technology. The addition of nanoparticles could have an impact on the properties of membranes used for nanofiltration. Nanoparticles can provide various functionalities to a membrane but, there are very few studies of the effect of mixing catalysts in PDA-modified membranes. In this study, polydopamine has been used to firmly bind a combination of nanoparticles on thin film composite (TFC) membranes. Two simple methods (a one-step and a two-step method) to assemble a multifunctional (TiO2, ZnO) layer of nanoparticles onto a commercial NF membrane as support have been evaluated by applying fast deposition of polydopamine (PDA). The membrane performance was evaluated based on the relative flux decline. Results show that the modification methods did not compromise the rejection of MgSO4, combined with an increase ∼15% in the rejection of NaCl. A 25% increase in the hydrophilicity of the modified membranes compared to pristine membrane was evidenced. In addition, the two-step modification method has antimicrobial activity for an ultralow load of 0.03 wt% ZnO nanoparticles; the antimicrobial activity increased when the membrane had a combination of TiO2:ZnO nanoparticles at 1:2 and 2:1 ratios using Bacillus Subtilis as model bacteria. The photocatalytic activity of the nanoparticles layer was demonstrated through the removal of methylene blue from a solution contacting the membrane when exposed to solar radiation.
Disciplines :
Chemistry
Author, co-author :
Bahamonde Soria, Raúl;  Renewable Energy Laboratory, Faculty of Chemical Sciences, Central University of Ecuador, Quito, Ecuador ; Materials & Process Engineering (iMMC-IMAP), UCLouvain, Louvain-la-Neuve, Belgium
Zhu, Junyong;  School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, China ; Department of Chemical Engineering, KU Leuven, Leuven, Belgium
Gonza Quito, Irma Elizabeth  ;  Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Gestion de la qualité dans la chaîne alimentaire
Van der Bruggen, Bart;  Department of Chemical Engineering, KU Leuven, Leuven, Belgium
Luis, Patricia;  Materials & Process Engineering (iMMC-IMAP), UCLouvain, Louvain-la-Neuve, Belgium
Language :
English
Title :
Effect of (TiO2: ZnO) ratio on the anti-fouling properties of bio-inspired nanofiltration membranes
Publication date :
15 November 2020
Journal title :
Separation and Purification Technology
ISSN :
1383-5866
eISSN :
1873-3794
Publisher :
Elsevier B.V.
Volume :
251
Pages :
117280
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ARES - Académie de Recherche et d'Enseignement Supérieur [BE]
Funding text :
The authors acknowledge the support provided by I ́Académie de Recherche et d ́Enseignemetn Supérieur (ARES) and Central University of Ecuador for financially supporting this work ( RFCQ-CQ-SO13-186-2017 ). The authors greatly thanks Laurence Ryelandt from pole Materials and Processes Engineering (IMAP) UCLouvain, for the SEM and EDX measurements.
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