文献类型：期刊文献

英文题名：Oil removal performance and separation mechanism of oleophilic/ oleophobic mixed granular bed

作者：Chen, Kelong[1];Liu, Shuo[1];Zhang, Yanhong[1];Yang, Qiang[1];Lu, Hao[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：91

外文期刊名：JOURNAL OF WATER PROCESS ENGINEERING

收录：;Scopus(收录号：2-s2.0-105044054198);WOS:【SCI-EXPANDED(收录号:WOS:001821976100001)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant No. 52370077) and the Fundamental Research Funds for the Central Universities (Grant No. JKB01251542) .

语种：英文

外文关键词：Oil-water separation; Oil droplet coalescence; Oleophilic/oleophobic particles; Granular bed layer

摘要：To address the inherent "efficiency-stability" trade-off faced by single-wettability coalescence particles in oilwater separation, this study systematically constructed five packed beds with distinct particle stacking configurations. Through macro-scale performance evaluation and micro-scale visualization technology, the intrinsic synergistic mechanism of oleophilic/oleophobic mixed granular bed layers was thoroughly investigated. Microscopic analysis revealed that the efficiency degradation of traditional oleophilic bed layers stems from a static "capture-clogging" mode, while single oleophobic bed layers are trapped in an unstable "bridging-rupture" cycle. In contrast, the superior performance of the homogeneously mixed bed layer originates from its unique synergistic mechanism: oleophobic particles act as "guiding" channels to direct oil droplets toward oleophilic particles for capture; simultaneously, the pores formed by oleophobic particles exert a "snap-off" self-cleaning effect on overgrown oil films, establishing a dynamic equilibrium of "capture-growth-snap-off-recapture". Macroscopic experiments demonstrated that the oleophilic/oleophobic homogeneously mixed bed layer exhibited excellent performance under all tested challenging conditions, with separation efficiency stably maintaining above 99%. The synergistic mechanism revealed in this study provides key design references for the development of next-generation coalescence separation systems with both high efficiency and strong antiinterference capability.