Dissecting the role of foulant-spacer interaction energy on membrane fouling with a collision-attachment-based Monte Carlo approach

文献类型： 外文期刊

第一作者： Liu, Junxia

作者： Liu, Junxia;Peng, Mingxin;Liu, Bingzhi;Fu, Wei;Zhao, Dongsheng;Lin, Chenxi;Tang, Zhiwei;Huang, Weiwei;Li, Tian

作者机构：

关键词： Foulant-spacer interaction; Foulant-membrane interaction; Foulant-deposited-foulant interaction; Collision attachment theory; Monte Carlo simulation

期刊名称：DESALINATION （ 影响因子：9.8； 五年影响因子：9.9 ）

ISSN： 0011-9164

年卷期： 2025 年 614 卷

页码：

收录情况： SCI

摘要： Feed channel spacer is an essential part in typical spiral-wound reverse osmosis and nanofiltration membrane modules. While existing studies have primarily focused on optimizing spacer geometries to enhance mass transfer and reduce concentration polarization, they have often overlooked the influence of spacer surface energy. Here, we report a collision-attachment-based Monte Carlo approach to systematically explore the impact of colloidal foulant-spacer (F-S) interaction on fouling development. Our modelling predictions closely match experimental data on water flux dynamics under varying applied pressure. Simulation outcomes indicate that the impact of F-S interaction is significantly affected by foulant-clean-membrane (F-M) and foulant-deposited-foulant (F-F) interactions. A high F-F energy barrier (E-f) ensures a long-term stable flux, irrespective of F-S energy barrier (E-s). Nevertheless, in the context of high F-M energy barrier (E-m) but low E-f, we observe an obviously mitigated membrane fouling with extended metastable flux period at E-s < E-m, thanks to the hotspot effect of spacer filament that attracts colloidal attachment nearby, hence reducing foulant transport towards membrane; conversely, an exacerbated fouling with more flux losses occurs when E-s surpasses E-m. We further find the role of F-S interaction becomes less noticeable as permeate drag starts to dominate. These findings provide valuable insights and suggest novel strategies for spacer design and fouling control in membrane filtration system.

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