Teow Yeit Haan, Ooi Boon Seng, Ahmad Abdul Latif, Lim Jit Kang
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia.
Research Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor Darul Ehsan, Malaysia.
Membranes (Basel). 2020 Dec 24;11(1):16. doi: 10.3390/membranes11010016.
Natural organic matters (NOMs) have been found to be the major foulant in the application of ultrafiltration (UF) for treating surface water. Against this background, although hydrophilicity has been demonstrated to aid fouling mitigation, other parameters such as membrane surface morphology may contribute equally to improved fouling resistance. In this work, with humic acid solution as the model substance, the effects of titanium dioxides (TiO) types (PC-20, P25, and X500) on membrane anti-fouling and defouling properties were comparatively analysed. The aims are (1) to determine the correlation between membrane surface morphology and membrane fouling and (2) to investigate the anti-fouling and UV-cleaning abilities of PVDF/TiO mixed-matrix membranes with different membrane topographies and surface energy conditions. The mixed-matrix membrane with P25 TiO exhibited the most significant UV-defouling ability, with a high irreversible flux recovery ratio (IFRR(UV)) of 16.56 after 6 h of UV irradiation, whereas that with X500 TiO exhibited both superior anti-fouling and defouling properties due to its smoother surface and its highly reactive surface layer.
天然有机物（NOMs）已被发现是超滤（UF）处理地表水应用中的主要污染物。在此背景下，尽管亲水性已被证明有助于减轻污染，但其他参数，如膜表面形态，可能同样有助于提高抗污染性能。在这项工作中，以腐殖酸溶液为模型物质，比较分析了二氧化钛（TiO）类型（PC - 20、P25和X500）对膜抗污染和自清洁性能的影响。目的是（1）确定膜表面形态与膜污染之间的相关性，以及（2）研究具有不同膜形貌和表面能条件的聚偏氟乙烯/二氧化钛混合基质膜的抗污染和紫外线清洁能力。含有P25 TiO的混合基质膜表现出最显著的紫外线自清洁能力，紫外线照射6小时后，其不可逆通量恢复率（IFRR(UV)）高达16.56，而含有X500 TiO的混合基质膜由于其表面更光滑且具有高活性表面层，表现出优异的抗污染和自清洁性能。
