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Title: Impact of particle shape and surface group on membrane fouling
Authors: Tanis-Kanbur, Melike Begum
Tamilselvam, Navin Raj
Lai, Hsiao Yu
Chew, Jia Wei
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Tanis-Kanbur, M. B., Tamilselvam, N. R., Lai, H. Y. & Chew, J. W. (2022). Impact of particle shape and surface group on membrane fouling. Membranes, 12(4), 403-.
Project: A20B3a0070 
Journal: Membranes 
Abstract: Membrane fouling remains one of the most critical drawbacks in membrane filtration processes. Although the effect of various operating parameters-such as flow velocity, concentration, and foulant size-are well-studied, the impact of particle shape is not well understood. To bridge this gap, this study investigated the effect of polystyrene particle sphericity (sphere, peanut and pear) on external membrane fouling, along with the effect of particle charge (unmodified, carboxylated, and aminated). The results indicate that the non-spherical particles produce higher critical fluxes than the spherical particles (i.e., respectively 24% and 13% higher for peanut and pear), which is caused by the looser packing in the cake due to the varied particle orientations. Although higher crossflow velocities diminished the differences in the critical flux values among the particles of different surface charges, the differences among the particle shapes remained distinct. In dead-end filtration, non-spherical particles also produced lower flux declines. The shear-induced diffusion model predicts all five particle types well. The Derjaguin-Landau-Verwey-Overbeek (DLVO) and extended DLVO (XDLVO) models were used to quantify the interaction energies, and the latter agreed with the relative critical flux trends of all of the PS particles. As for the flux decline trends, both the DLVO and XDLVO results are in good agreement.
ISSN: 2077-0375
DOI: 10.3390/membranes12040403
Schools: School of Chemical and Biomedical Engineering 
Research Centres: Nanyang Environment and Water Research Institute 
Singapore Membrane Technology Centre 
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:NEWRI Journal Articles
SCBE Journal Articles

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