The oil-water mixture or oily wastewater are complex, containing oil and other pollutants such as heavy metal ions. In this study, we synthesized a micro/nanostructural silica/alkali-treated natural zeolite coated fabric for oil-water separation and heavy metal ions removal. The alkali-treated natural zeolite with a low SiO₂/Al₂O₃ ratio, and high hydroxyl group content exhibited excellent hydrophilicity and ion exchange property, while the nano-silica as a binder could assist the zeolite powders to form micro/nano-hierarchical structures on the surface of fabric. The as-prepared material with underwater superoleophobicity (151.5° for kerosene, 153.4° for cyclohexane) exhibited efficient oil-water separation efficiency (99.4% for kerosene, 98.0% for cyclohexane) and excellent recycle property (98.3% for kerosene, 96.8% for cyclohexane after recycled for 40 times). Additionally, the material could simultaneously remove heavy metal ions from water (86.5% for Cr ions, 67.4% for Mn ions after six times of separation). This study provided a simple, low cost and environmental approach for application in oil-water separation and heavy metal ions removal.

油水混合物或含油废水是复杂的，含有油和其他污染物，如重金属离子。在这项研究中，我们合成了一种微/纳米结构的二氧化硅/碱处理的天然沸石涂层织物，用于油水分离和重金属离子去除。低SiO ₂ /Al ₂ O ₃碱处理天然沸石比，高羟基含量表现出优异的亲水性和离子交换性能，而纳米二氧化硅作为粘合剂可以帮助沸石粉在织物表面形成微/纳米层次结构。制备的具有水下超疏油性（煤油 151.5°，环己烷 153.4°）的材料表现出高效的油水分离效率（煤油 99.4%，环己烷 98.0%）和优异的回收性能（煤油 98.3%，环己烷 96.8%）。循环40次后的环己烷）。此外，该材料可以同时去除水中的重金属离子（六次分离后，Cr 离子为 86.5%，Mn 离子为 67.4%）。该研究为油水分离和重金属离子去除提供了一种简单、低成本和环保的方法。