Bai Ruxue, Huang Ying, Zhang Qingqing, Hu Xinyi, Li Sihang, Xian Yumei, Li Min, Phosri Cherdchai, Wang Haihua, Li Zhenyu
College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.
J Hazard Mater. 2026 Feb 15;504:141340. doi: 10.1016/j.jhazmat.2026.141340. Epub 2026 Feb 2.
Membrane fouling caused by oil droplets and organic contaminants remains a significant challenge in food oily wastewater treatment. Inspired by nacre's architecture, a superhydrophilic PVDF-PCT-Cu membrane was fabricated via a combination of deposition with polydopamine, carboxymethyl chitosan and tetrabutyl titanate and mineralization with Cu. The membrane exhibited superhydrophilicity (water contact angle: 0°) and underwater superoleophobicity (underwater oil contact angle: 152.65° ± 0.88°). It achieves high permeation fluxes (290.20-342.71 L m h) and separation efficiency (98.34-99.78 %) for four oil/water emulsions (soybean oil, corn oil, blended oil, and rapeseed oil). PVDF-PCT-Cu membrane also demonstrated excellent antioilfouling performance (flux recovery rate: 91.19 %), chemical stability across acidic, alkaline, and saline conditions, and strong antimicrobial activity against Escherichia coli and Staphylococcus aureus. In treating actual food oily wastewater, PVDF-PCT-Cu membrane achieved over 90.87 % separation efficiency, significantly reducing pollutants and improving clarity, showing great potential for food oily wastewater treatment.
油滴和有机污染物引起的膜污染仍然是食品含油废水处理中的一个重大挑战。受珍珠母结构的启发，通过聚多巴胺、羧甲基壳聚糖和钛酸四丁酯的沉积与铜的矿化相结合，制备了一种超亲水PVDF-PCT-Cu膜。该膜表现出超亲水性（水接触角：0°）和水下超疏油性（水下油接触角：152.65°±0.88°）。对于四种油/水乳液（大豆油、玉米油、调和油和菜籽油），它实现了高渗透通量（290.20-342.71 L m h）和分离效率（98.34-99.78%）。PVDF-PCT-Cu膜还表现出优异的抗油污性能（通量恢复率：91.19%）、在酸性、碱性和盐性条件下的化学稳定性以及对大肠杆菌和金黄色葡萄球菌的强抗菌活性。在处理实际食品含油废水时，PVDF-PCT-Cu膜的分离效率超过90.87%，显著降低了污染物并提高了清澈度，在食品含油废水处理方面显示出巨大潜力。
