Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
School of Environment, Tsinghua University, Beijing, 100084, China.
Environ Sci Pollut Res Int. 2018 Aug;25(23):22911-22919. doi: 10.1007/s11356-018-2385-4. Epub 2018 Jun 1.
Superhydrophobic materials have an excellent performance in oil adsorption. In this study, a novel magnetic polydivinylbenzene (PDVB) nanofiber was synthesized by the method of cation polymerization to adsorb oil from water. The magnetic PDVB was hollow nanofiber with FeO nanoparticles embedded in its structure. The synthesis condition was optimized that the ratio of divinylbenzene (DVB) to boron fluoride ethyl ether (BFEE) was 10:1 (v/v), and the FeO dosage was 0.175 g/g of DVB. The material showed an excellent oil adsorption performance in wastewater, and the oil concentration could be reduced from 2000 to 92.2 mg/L within 5 min. The magnetic PDVB had relatively high adsorption capacity (12 g/g) for oil, which could be attributed to its super hydrophobicity and one-dimensional nanostructure with high crosslinking degree. The isotherm study indicated that the magnetic PDVB adsorbed oil was an asymmetric or multilayer adsorption process. The material could be regenerated by simple squeeze and maintain its adsorption capacity after it has been used for 10 recycles. In real coking wastewater, the magnetic PDVB kept a good oil adsorption performance without the interference of various pollutants, indicating a wide prospect in practical use.
超疏水材料在吸附油方面具有优异的性能。在这项研究中，通过阳离子聚合的方法合成了一种新型的磁性聚二乙烯基苯（PDVB）纳米纤维，用于从水中吸附油。磁性 PDVB 是具有嵌入其结构中的 FeO 纳米颗粒的中空纳米纤维。优化了合成条件，即二乙烯基苯（DVB）与硼酸三乙基醚（BFEE）的比例为 10:1（v/v），FeO 的用量为 0.175 g/g 的 DVB。该材料在废水处理中表现出优异的吸油性能，可在 5 分钟内将油浓度从 2000 降至 92.2 mg/L。磁性 PDVB 对油具有较高的吸附容量（12 g/g），这归因于其超疏水性和高交联度的一维纳米结构。等温吸附研究表明，磁性 PDVB 吸附油是一种非对称或多层吸附过程。该材料可通过简单挤压进行再生，并在使用 10 次循环后保持其吸附容量。在实际焦化废水中，磁性 PDVB 保持了良好的吸油性能，不受各种污染物的干扰，表明其在实际应用中有广阔的前景。
