Coalescence deoiling is a rapid and effective removal method of dispersed oil in wastewater. However, the coalescence process can not be used to treat the emulsion containing surfactants. In this paper, a Zeolite/Mg²⁺/cyclodextrin/Fe₃O₄ composite material is designed for simultaneous demulsification and coalescence deoiling of the emulsion containing surfactants. The zeolite can provide a considerable ion exchange capacity to capture the surfactant and a large surface area to be modified. The Mg²⁺ on the zeolite surface can compress the electric double layer, coagulat with the surfactant complex and then destroy the stability of emulsion. The cyclodextrin can capture the surfactant and adsorb the dissolved oil. The nano-Fe₃O₄ can act as a bridge between the cyclodextrin and the zeolite, and accelerate the solid-liquid separation assisted by a magnetic field. Experimental results show that this composite material can separate oil from the emulsion rapidly in about 40s and can be recycled. The surface of the material becomes lipophilic due to the bridging effect of surfactant, which accelerates the coalescence of oil particles. The demulsification and deoiling mechanism is concluded based on the comprehensive consideration of the change of the emulsion property and the material characterization results.

聚结脱油是一种快速有效地去除废水中分散油的方法。但是，聚结方法不能用于处理含有表面活性剂的乳液。本文设计了一种沸石/ Mg ²⁺ /环糊精/ Fe ₃ O ₄复合材料，用于同时对含表面活性剂的乳液进行反乳化和聚结脱油。沸石可以提供相当大的离子交换能力以捕获表面活性剂和较大的待改性表面积。沸石表面的Mg ²⁺可以压缩双电层，与表面活性剂复合物凝结，进而破坏乳液的稳定性。环糊精可以捕获表面活性剂并吸附溶解的油。纳米铁₃ O ₄可以充当环糊精和沸石之间的桥梁，并在磁场的辅助下加速固液分离。实验结果表明，该复合材料可在约40 s内迅速从乳液中分离出油，并可以回收利用。由于表面活性剂的桥接作用，材料的表面变为亲脂性，从而加速了油颗粒的聚结。在综合考虑乳液性能变化和材料表征结果的基础上，得出了破乳脱油机理。